LSN50 & LSN50-V2 - LoRaWAN Sensor Node User Manual

(% style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||height="15" role="presentation" title="Click and drag to move" width="15"]]

20

)))

21

= 1. Introduction =

== 1.1 What is LSN50 LoRa Sensor Node ==

(((

(((

LSN50 is a Long Range LoRaWAN Sensor Node. It is designed for (% style="color:#4472c4" %)**outdoor data logging **(%%)and powered by (% style="color:#4472c4" %)**Li/SOCl2 battery**(%%) for long term use and secure data transmission. It is designed to facilitate developers to quickly deploy industrial level LoRa and IoT solutions. It helps users to turn the idea into a practical application and make the Internet of Things a reality. It is easy to program, create and connect your things everywhere.

)))

(((

It is based on SX1276/SX1278 allows the user to send data and reach extremely long ranges at low data-rates. It provides ultra-long range spread spectrum communication and high interference immunity whilst minimizing current consumption. It targets professional wireless sensor network applications such as irrigation systems, smart metering, smart cities, smartphone detection, building automation, and so on.

)))

(((

(% style="color:#4472c4" %)**LSN50**(%%) uses STM32l0x chip from ST, STML0x is the (% style="color:#4472c4" %)**ultra-low-power**(%%) STM32L072xx microcontrollers incorporate the connectivity power of the universal serial bus (USB 2.0 crystal-less) with the high-performance ARM® Cortex®-M0+ 32-bit RISC core operating at a 32 MHz frequency, a memory protection unit (MPU), high-speed embedded memories (192 Kbytes of Flash program memory, 6 Kbytes of data EEPROM and 20 Kbytes of RAM) plus an extensive range of enhanced I/Os and peripherals.

)))

(((

LSN50 is an (% style="color:#4472c4" %)**open source product**(%%), it is based on the STM32Cube HAL drivers and lots of libraries can be found in ST site for rapid development.

)))

)))

[[image:1656294562709-486.png]]

== 1.2 Specifications ==

62

63

64

(% style="color:#037691" %)**Micro Controller:**

* STM32L072CZT6 MCU

* MCU: STM32L072CZT6

* Flash: 192KB

* RAM: 20KB

* EEPROM: 6KB

* Clock Speed: 32Mhz

(% style="color:#037691" %)**Common DC Characteristics:**

74

75

* Supply Voltage: 2.1v ~~ 3.6v

76

* Operating Temperature: -40 ~~ 85°C

77

* I/O pins: Refer to STM32L072 datasheet

78

79

(% style="color:#037691" %)**LoRa Spec:**

* Frequency Range,

** Band 1 (HF): 862 ~~ 1020 Mhz

or

*

** Band 2 (LF): 410 ~~ 528 Mhz

89

* 168 dB maximum link budget.

90

* +20 dBm - 100 mW constant RF output vs.

91

* +14 dBm high efficiency PA.

92

* Programmable bit rate up to 300 kbps.

93

* High sensitivity: down to -148 dBm.

94

* Bullet-proof front end: IIP3 = -12.5 dBm.

95

* Excellent blocking immunity.

96

* Low RX current of 10.3 mA, 200 nA register retention.

97

* Fully integrated synthesizer with a resolution of 61 Hz .

98

* FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.

99

* Built-in bit synchronizer for clock recovery.

100

* Preamble detection.

101

* 127 dB Dynamic Range RSSI.

102

* Automatic RF Sense and CAD with ultra-fast AFC.

103

* Packet engine up to 256 bytes with CRC.

104

* LoRaWAN 1.0.2 Specification

105

106

(% style="color:#037691" %)**Battery:**

107

108

* Li/SOCI2 un-chargeable battery

109

* Capacity: 4000mAh

110

* Self Discharge: <1% / Year @ 25°C

111

* Max continuously current: 130mA

112

* Max boost current: 2A, 1 second

113

114

(% style="color:#037691" %)**Power Consumption**

115

116

* STOP Mode: 2.7uA @ 3.3v

117

* LoRa Transmit Mode: 125mA @ 20dBm 44mA @ 14dBm

== 1.3 Features ==

* LoRaWAN 1.0.3 Class A, Class C

122

* STM32L072CZT6 MCU

123

* SX1276/78 Wireless Chip

124

* Pre-load bootloader on USART1/USART2

125

* MDK-ARM Version 5.24a IDE

126

* I2C, LPUSART1, USB, SPI2

127

* 3x12bit ADC, 1x12bit DAC

* 20xDigital I/Os

* LoRa™ Modem

* Preamble detection

* Baud rate configurable

132

* CN470/EU433/KR920/US915/IN865

133

* EU868/AS923/AU915

134

* Open-source hardware / software

135

* Available Band:433/868/915/920 Mhz

136

* IP66 Waterproof Enclosure

137

* Ultra-Low Power consumption

138

* AT Commands to change parameters

139

* 4000mAh or 8500mAh Battery for long term use。

140

141

== 1.4 Applications ==

142

143

* Smart Buildings & Home Automation

144

* Logistics and Supply Chain Management

* Smart Metering

* Smart Agriculture

* Smart Cities

* Smart Factory

(% title="Click and drag to resize" %)(% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" tabindex="-1" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||data-widget="image" draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220, 220, 220, 0.5); display:none" tabindex="-1" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" tabindex="-1" title="Click and drag to resize" %)(% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220, 220, 220, 0.5); display:none" tabindex="-1" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||data-widget="image" draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]][[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% title="Click and drag to resize" %)(% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" tabindex="-1" %)(%%)

== 1.5 Pin Definitions and Switch ==

155

156

(% class="wikigeneratedid" %)

157

[[image:1656295519542-152.png||height="413" width="728"]]

158

159

160

(% class="wikigeneratedid" %)

161

[[image:1656295532863-613.png||height="371" width="721"]]

162

163

164

(% class="wikigeneratedid" %)

165

[[image:image-20220627101527-1.png]]

166

167

(% class="wikigeneratedid" style="display:none" %)

=== 1.5.1 Jumper JP2 ===

172

173

Power on Device when put this jumper.

174

175

176

=== 1.5.2 BOOT MODE / SW1 ===

177

178

(((

179

~1. ISP: upgrade mode, device won't have any signal in this mode. but ready for upgrade firmware. LED won't work. Firmware won't run.

)))

(((

2. Flash: work mode, device starts to work and send out console output for further debug

)))

=== 1.5.3 Reset Button ===

188

189

Press to reboot the device.

=== 1.5.4 LED ===

It will flash:

1. When boot the device in flash mode

197

1. Send an uplink packet

198

199

=== 1.6 Hardware Change log ===

200

201

Note: Hardware version is marked in the PCB.

**LSN50 v2.1:**

1. Change R14 to 1M ohm

206

1. Change R3, R4 to 4.7Kohm. So no need to modify them for 3 DS18B20 connection.

207

1. Add ESD to each I/O

**LSN50 v2.0:**

* Change to a new enclosure. Improve with external antenna, IP68, ear hook.

**LSN50 v1.3**:

* Add P-MOS to control 5V output

**LSN50 v1.2**:

* Add LED. Turn on for every LoRa transmit

220

* Add pin PA4, PB13, NRST

221

* Add 5V Output, on/off control by PB5(Low to Enable, High to Disable)

222

223

== (% id="cke_bm_478801S" style="display:none" %) (%%)1.7 Hole Option ==

224

225

The LSN50 provides different hole size options for different size sensor cable. The options provided are M12, M16 and M20. The definition is as below:

226

227

[[image:image-20220627104757-1.png]]

228

229

230

[[image:1656298089706-973.png]]

= 2. Use LSN50 with LoRaWAN firmware =

235

236

== 2.1 How it works ==

(((

(((

The LSN50 is pre-loaded with a firmware and is configured as LoRaWAN OTAA Class A mode by default. It has OTAA keys to join LoRaWAN network. To connect a local LoRaWAN network, you just need to input the OTAA keys in the LoRaWAN IoT server and power on the LSN50. It will automatically join the network via OTAA.

)))

(((

)))

(((

The diagram below shows the working flow in default firmware (ver 1.7.0):

)))

[[image:image-20220627104855-2.png]]

253

254

255

In case you can't set the OTAA keys in the LoRaWAN OTAA server, and you have to use the keys from the server, you can [[use AT Commands>>doc:Main.End Device AT Commands and Downlink Command.WebHome]] to set the keys in the LSN50.

)))

== 2.2 Quick guide to connect to LoRaWAN server (OTAA) ==

260

261

(((

262

Following is an example for how to join the [[TTN V3 LoRaWAN Network>>url:http://www.thethingsnetwork.org/]]. Below is the network structure; we use the [[LG308>>url:http://www.dragino.com/products/lora/item/140-lg308.html]] as a LoRaWAN gateway in this example.

263

264

(% style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]][[image:1655891470063-521.png]](% title="Click and drag to resize" %)[[image:1656298385089-555.png]]

)))

(% title="Click and drag to resize" %)(%%)The LG308 is already set to connected to [[TTN V3 network >>url:https://www.thethingsnetwork.org/]], so what we need to now is configure the TTN V3 server.(% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220, 220, 220, 0.5); display:none" tabindex="-1" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||data-widget="image" draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]][[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% title="Click and drag to resize" %)(% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" tabindex="-1" %)(%%)

(((

(% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LSN50.

275

276

Each LSN50is shipped with a sticker with the default device EUI as below:

)))

(((

)))

(% aria-label="image-20220607170145-1.jpeg image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:image-20220607170145-1.jpeg||data-widget="image"]](% style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% title="Click and drag to resize" %)(% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" tabindex="-1" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||data-widget="image" draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220, 220, 220, 0.5); display:none" tabindex="-1" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" tabindex="-1" title="Click and drag to resize" %)(% title="Click and drag to resize" %)(% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" tabindex="-1" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||data-widget="image" draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220, 220, 220, 0.5); display:none" tabindex="-1" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" tabindex="-1" title="Click and drag to resize" %)(% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220, 220, 220, 0.5); display:none" tabindex="-1" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||data-widget="image" draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]][[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% title="Click and drag to resize" %)(% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" tabindex="-1" %)(%%)

(((

You can enter this key in the LoRaWAN Server portal. Below is TTN screen shot:

288

289

**Register the device：**

290

)))

291

292

(% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" tabindex="-1" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||data-widget="image" draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220, 220, 220, 0.5); display:none" tabindex="-1" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" tabindex="-1" title="Click and drag to resize" %)(% title="Click and drag to resize" %)(% aria-label="1654935135620-998.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:1654935135620-998.png||data-widget="image"]](% style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](%%)(% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" tabindex="-1" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||data-widget="image" draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220, 220, 220, 0.5); display:none" tabindex="-1" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" tabindex="-1" title="Click and drag to resize" %)(% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" tabindex="-1" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||data-widget="image" draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220, 220, 220, 0.5); display:none" tabindex="-1" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" tabindex="-1" title="Click and drag to resize" %)(% title="Click and drag to resize" %)

293

294

(% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" tabindex="-1" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||data-widget="image" draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220, 220, 220, 0.5); display:none" tabindex="-1" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" tabindex="-1" title="Click and drag to resize" %)(% title="Click and drag to resize" %)

295

296

297

**Add APP EUI and DEV EUI：**

298

299

300

(% aria-label="image-20220611161308-4.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:image-20220611161308-4.png||data-widget="image" height="551" width="753"]](% style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% title="Click and drag to resize" %)

**Add APP EUI in the application：**

305

306

307

(% aria-label="image-20220611161308-5.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:image-20220611161308-5.png||data-widget="image" height="601" width="742"]](% style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% title="Click and drag to resize" %)

**Add APP KEY**

(% aria-label="image-20220611161308-6.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:image-20220611161308-6.png||data-widget="image" height="485" width="744"]](% style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% title="Click and drag to resize" %)

313

314

(% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" tabindex="-1" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||data-widget="image" draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220, 220, 220, 0.5); display:none" tabindex="-1" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" tabindex="-1" title="Click and drag to resize" %)(% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" tabindex="-1" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||data-widget="image" draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220, 220, 220, 0.5); display:none" tabindex="-1" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" tabindex="-1" title="Click and drag to resize" %)

315

316

(% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" tabindex="-1" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||data-widget="image" draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220, 220, 220, 0.5); display:none" tabindex="-1" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" tabindex="-1" title="Click and drag to resize" %)(% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220, 220, 220, 0.5); display:none" tabindex="-1" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||data-widget="image" draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]][[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% title="Click and drag to resize" %)(% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" tabindex="-1" %)(%%)

317

318

(% style="color:blue" %)**Step 2**(%%): Power on LSN50

319

320

Put a Jumper on JP2 to power on the device.(% style="display:none" %)

321

322

[[image:image-20220627145643-5.png]](% style="display:none" %)

323

324

(% style="display:none" %)

325

326

327

(% style="display:none" %) (%%)

**For LSn50v2:**

[[image:1656313034748-905.png]](% style="display:none" %)

332

333

334

(% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" tabindex="-1" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||data-widget="image" draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220, 220, 220, 0.5); display:none" tabindex="-1" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" tabindex="-1" title="Click and drag to resize" %)(%%)(% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" tabindex="-1" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||data-widget="image" draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220, 220, 220, 0.5); display:none" tabindex="-1" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" tabindex="-1" title="Click and drag to resize" %)(% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220, 220, 220, 0.5); display:none" tabindex="-1" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||data-widget="image" draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]][[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% title="Click and drag to resize" %)(% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" tabindex="-1" %)(%%)

(((

(((

(% style="color:blue" %)**Step 3**(%%)**:** The LSN50 will auto join to the TTN V3 network. After join success, it will start to upload messages to TTN V3 and you can see the messages in the panel.

)))

)))

(% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" tabindex="-1" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||data-widget="image" draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220, 220, 220, 0.5); display:none" tabindex="-1" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" tabindex="-1" title="Click and drag to resize" %)(% title="Click and drag to resize" %)[[image:1656312908855-552.png]](% style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]]

343

344

(% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" tabindex="-1" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||data-widget="image" draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220, 220, 220, 0.5); display:none" tabindex="-1" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" tabindex="-1" title="Click and drag to resize" %)(% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" tabindex="-1" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||data-widget="image" draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220, 220, 220, 0.5); display:none" tabindex="-1" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||draggable="true" height="15" role="presentation" title="Click and drag to move" width="15"]](% aria-label="Data URI image image widget" contenteditable="false" role="region" style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" tabindex="-1" title="Click and drag to resize" %)(% title="Click and drag to resize" %)

345

346

347

== 2.3 Working Mode & Uplink Payload ==

348

349

LSN50 has different working mode for the connections of different type of sensors. This section describes these modes. Use can use the AT Command AT+MOD to set LSN50 to different working modes.

For example:

(% style="color:red" %)**AT+MOD=2**(%%) ~/~/ will set the LSN50 to work in MOD=2 distance mode which target to measure distance via Ultrasonic Sensor.

354

355

356

(% style="color:red" %)**NOTE:**

357

358

(% style="color:red" %)1. Some working modes has payload more than 12 bytes, The US915/AU915/AS923 frequency bands’ definition has maximum 11 bytes in **DR0**. Server sides will see NULL payload while LSn50 transmit in DR0 with 12 bytes payload.

359

2. All modes share the same Payload Explanation from HERE.

360

3. By default, the device will send an uplink message every 5 minutes.

361

362

(% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:400px" %)

363

|=(% style="width: 62.5px;" %)(((

364

**Size (bytes)**

365

366

|(% style="width:65px" %)**Value**|(((

367

[[Battery>>||anchor="HBattery:"]]

368

)))|(% style="width:61px" %)(((

369

ignore

370

)))|(% style="width:91px" %)(((

371

[[Alarm Flag>>||anchor="HAlarmFlag26MOD:"]]

372

)))|(% style="width:99px" %)(((

373

[[Temperature>>||anchor="HTemperature:"]]

374

)))|(% style="width:97px" %)(((

375

[[Humidity>>||anchor="HHumidity:"]]

376

)))

377

378

=== 2.3.1 MOD~=1 (Default Mode) ===

379

380

(((

381

In this mode, uplink payload includes in total 11 bytes. Uplink packets use FPORT=2.

382

[[image:image-20220627171207-27.png]]

383

384

[[image:image-20220627150949-6.png]]

)))

=== 2.3.2 MOD~=2 (Distance Mode) ===

391

392

This mode is target to measure the distance. The payload of this mode is totally 11 bytes. The 8^^th^^ and 9^^th^^ bytes is for the distance.

393

394

[[image:image-20220627180835-31.png]]

395

396

397

[[image:1656324539647-568.png]]

Connection of LIDAR-Lite V3HP:

403

404

[[image:1656324581381-162.png]]

405

406

407

Connection to Ultrasonic Sensor:

408

409

[[image:1656324598488-204.png]]

For the connection to TF-Mini or TF-Luna , MOD2 payload is as below:

416

417

418

(% border="1" style="background-color:#ffffcc; color:green; width:959px" %)

419

420

|(% style="width:102px" %)**Value**|(% style="width:51px" %)BAT|(% style="width:178px" %)(((

421

Temperature(DS18B20)

422

)))|(% style="width:211px" %)Digital in & Digital Interrupt|(% style="width:60px" %)ADC|(% style="width:168px" %)(((

Distance measure by:

1)TF-Mini plus LiDAR

Or

2) TF-Luna LiDAR

)))|(% style="width:186px" %)Distance signal strength

Connection to [[TF-Mini plus>>url:http://en.benewake.com/product/detail/5c345cd0e5b3a844c472329b.html]] LiDAR(UART version):

435

436

Need to remove R3 and R4 resistors to get low power. Since firmware v1.7.0[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image005.png]]

Connection to [[TF-Luna>>url:http://en.benewake.com/product/detail/5e1c1fd04d839408076b6255.html]] LiDAR (UART version):

441

442

Need to remove R3 and R4 resistors to get low power. Since firmware v1.7.0

443

444

445

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image006.png]]

446

447

448

Please use firmware version > 1.6.5 when use MOD=2, in this firmware version, user can use LSn50 v1 to power the ultrasonic sensor directly and with low power consumption.

=== 2.3.3 MOD~=3 (3 ADC + I2C) ===

455

456

457

This mode has total 12 bytes. Include 3 x ADC + 1x I2C

458

459

460

(% border="1" style="background-color:#ffffcc; color:green" %)

461

|**Size(bytes)**|**2**|**2**|**2**|**1**|**2**|**2**|**1**

|**Value**|(((

ADC1

(Pin PA0)

)))|(((

ADC2

(PA1)

)))|(((

ADC3

(PA4)

)))|Digital in & Digital Interrupt|(((

Temperature

(SHT20 or SHT31)

)))|(((

Humidity

(SHT20 or SHT31)

)))|BAT

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image007.png]]

485

486

487

=== 2.3.4 MOD~=4 (3 x DS18B20) ===

488

489

490

This mode is supported in firmware version since v1.6.1. Software set to AT+MOD=4

491

492

Hardware connection is as below,

(Note:

* In hardware version v1.x and v2.0 , R3 & R4 should change from 10k to 4.7k ohm to support the other 2 x DS18B20 probes.

497

* In hardware version v2.1 no need to change R3 , R4, by default, they are 4.7k ohm already.

498

499

See [[here>>path:#hardware_changelog]] for hardware changelog.

)

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image008.png]]

504

505

506

This mode has total 11 bytes. As shown below:

507

508

(% border="1" style="background-color:#ffffcc; color:green" %)

509

|**Size(bytes)**|**2**|**2**|**2**|**1**|**2**|**2**

|**Value**|BAT|(((

Temperature1

(DS18B20)

(PB3)

)))|(((

ADC

)))|Digital in & Digital Interrupt|(((

Temperature2

(DS18B20)

(PA9)

)))|(((

Temperature3

(DS18B20)

(PA10)

)))

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image009.png]]

535

536

537

=== 2.3.5 MOD~=5(Weight Measurement by HX711) ===

538

539

540

This mode is supported in firmware version since v1.6.2. Please use v1.6.5 firmware version so user no need to use extra LDO for connection.

541

542

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image010.png]]

543

544

545

Each HX711 need to be calibrated before used. User need to do below two steps:

546

547

1. Zero calibration. Don’t put anything on load cell and run **AT+WEIGRE** to calibrate to Zero gram.

548

1. Adjust calibration factor (default value 400): Put a known weight thing on load cell and run **AT+WEIGAP** to adjust the Calibration Factor.

For example:

**AT+WEIGAP =403.0**

Response: Weight is 401 g

556

557

558

Check the response of this command and adjust the value to match the real value for thing.

(% border="1" style="background-color:#ffffcc; color:green" %)

563

|**Size(bytes)**|**2**|**2**|**2**|**1**|**2**|**2**

564

|**Value**|[[BAT>>path:#BAT]]|(((

565

[[Temperature>>path:#DS18B20]]

566

567

[[(DS18B20)>>path:#DS18B20]]

568

)))|[[ADC>>path:#ADC]]|[[Digital in & Digital Interrupt>>path:#Digtial_input]]|Weight|Reserved

569

570

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image011.png]]

=== 2.3.6 MOD~=6(Counting Mode, Since firmware v1.6.5) ===

577

578

579

In this mode, the device will work in counting mode. It counts the interrupt on the interrupt pins and sends the count on TDC time.

580

581

582

Connection is as below. The PIR sensor is a count sensor, it will generate interrupt when people come close or go away. User can replace the PIR sensor with other counting sensors.

583

584

585

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image012.png]]

586

587

Note: LoRaWAN wireless transmission will infect the PIR sensor. Which cause the counting value increase +1 for every uplink. User can change PIR sensor or put sensor away of the LSN50 to avoid this happen.

588

589

590

(% border="1" style="background-color:#ffffcc; color:green" %)

591

|**Size(bytes)**|**2**|**2**|**2**|**1**|**4**

592

|**Value**|[[BAT>>path:#BAT]]|(((

593

[[Temperature>>path:#DS18B20]]

594

595

[[(DS18B20)>>path:#DS18B20]]

596

)))|[[ADC>>path:#ADC]]|[[Digital in>>path:#Digtial_input]]|Count

597

598

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image013.png]]

=== 2.3.7 Decode payload in The Things Network ===

606

607

While using TTN V3 network, you can add the payload format to decode the payload.

608

609

610

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image014.png]]

611

612

613

The payload decoder function for TTN V3 are here:

614

615

LSN50 TTN V3 Payload Decoder: [[http:~~/~~/www.dragino.com/downloads/downloads/LSN50-LoRaST/Payload_decoder/>>url:http://www.dragino.com/downloads/downloads/LSN50-LoRaST/Payload_decoder/]]

== 2.4 Payload Explanation and Sensor Interface ==

624

625

=== 2.4.1 Battery Info ===

626

627

Check the battery voltage for LSN50.

Ex1: 0x0B45 = 2885mV

Ex2: 0x0B49 = 2889mV

=== 2.4.2 Temperature (DS18B20) ===

635

636

If there is a DS18B20 connected to PB3 pin. The temperature will be uploaded in the payload.

637

638

639

More DS18B20 can check the [[3 DS18B20 mode>>path:#ds18b20_3]]

**Connection**

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image015.png]]

**Example**:

If payload is: 0105H: (0105 & FC00 == 0), temp = 0105H /10 = 26.1 degree

650

651

If payload is: FF3FH : (FF3F & FC00 == 1) , temp = (FF3FH - 65536)/10 = -19.3 degrees.

652

653

654

=== 2.4.3 Digital Input ===

655

656

The digital input for pin PA12,

657

658

* When PA12 is high, the bit 1 of payload byte 6 is 1.

659

* When PA12 is low, the bit 1 of payload byte 6 is 0.

=== 2.4.4 Analogue Digital Converter (ADC) ===

664

665

666

The ADC pins in LSN50 can measure range from 0~~3.3v, it use reference voltage from STM32. If user need to measure a voltage >3.3v, please use resistors to divide this voltage to lower than 3.3v, otherwise, it may destroy the ADC pin.

667

668

669

The ADC monitors the voltage on the PA0 line, in mV.

Ex: 0x021F = 543mv,

**Example1:** Reading an Oil Sensor (Read a resistance value):

675

676

[[image:image-20220627172409-28.png]]

In the LSN50, we can use PB4 and PA0 pin to calculate the resistance for the oil sensor.

Steps:

1. Solder a 10K resistor between PA0 and VCC.

687

1. Screw oil sensor's two pins to PA0 and PB4.

688

689

The equipment circuit is as below:

690

691

[[image:image-20220627172500-29.png]]

According to above diagram:

697

698

(//VCC-VPA010k=VPA0Roilsensor//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image018.png]]

So

//Roilsensor=VPA0×10KVCC-VPA0//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image019.png]]

704

705

//VPA0//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image020.png]] is the reading of ADC. So if ADC=0x05DC=0.9 v and VCC (BAT) is 2.9v

706

707

708

The //Roilsensor=0.9×10K2.9-0.9=//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image021.png]] 4.5K ohm

709

710

Since the Bouy is linear resistance from 10 ~~ 70cm.

711

712

713

The position of Bouy is //4.5K10K×70cm-10cm+10cm=37cm//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image022.png]] , from the bottom of Bouy

714

715

716

=== 2.4.5 Digital Interrupt ===

717

718

Digital Interrupt refers to pin PB14, and there are different trigger methods. When there is a trigger, the LSN50 will send a packet to the server.

719

720

721

Interrupt connection method:

722

723

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image023.png]]

724

725

726

**Example to use with door sensor **

727

(Requires firmware > 1.5.1)

728

729

730

The door sensor is shown at right. It is a two wire magnetic contact switch used for detecting the open/close status of doors or windows. [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image024.png]]

731

732

733

When the two pieces are close to each other, the 2 wire output will be short or open (depending on the type), while if the two pieces are away from each other, the 2 wire output will be the opposite status. So we can use LSN50 interrupt interface to detect the status for the door or window.

734

735

736

Below is the installation example:

737

738

Fix one piece of the magnetic sensor to the door and connect the two pins to LSN50 as follows:

739

740

* One pin to LSN50’s PB14 pin

741

* The other pin to LSN50’s VCC pin

742

743

Install the other piece to the door. Find a place where the two pieces will be close to each other when the door is closed. For this particular magnetic sensor, when the door is closed, the output will be short, and PB14 will be at the VCC voltage.

744

745

746

Door sensors have two types: NC (Normal close) and NO (normal open). The connection for both type sensors are the same. But the decoding for payload are reverse, user need to modify this in the IoT Server decoder.

747

748

749

When door sensor is shorted, there will extra power consumption in the circuit, the extra current is 3v3/R14 = 3v2/1Mohm = 0.3uA which can be ignored.

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image025.png]]

755

756

757

The above photos shows the two parts of the magnetic switch fitted to a door.

758

759

760

The software by default uses the falling edge on the signal line as an interrupt. We need to modify it to accept both the rising edge (0v ~-~-> VCC , door close) and the falling edge (VCC ~-~-> 0v , door open) as the interrupt.

The command is:

**AT+INTMOD=1 ~/~/(more info about INMOD please refer **[[**AT Command Manual**>>url:http://www.dragino.com/downloads/index.php?dir=LSN50-LoRaST/&file=DRAGINO_LSN50_AT_Commands_v1.5.1.pdf]]**. )**

766

767

768

Below shows some screen captures in TTN V3:

769

770

771

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image026.png]]

772

773

774

In MOD=1, user can use byte 6 to see the status for door open or close. TTN V3 decoder is as below:

775

776

777

door= (bytes[6] & 0x80)? "CLOSE":"OPEN";

**Notice for hardware version LSN50 v1 < v1.3** (produced before 2018-Nov).

782

783

In this hardware version, there is no R14 resistance solder. When use the latest firmware, it should set AT+INTMOD=0 to close the interrupt. If user need to use Interrupt in this hardware version, user need to solder R14 with 10M resistor and C1 (0.1uF) on board.

784

785

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image027.png]]

=== 2.4.6 I2C Interface (SHT20) ===

792

793

The PB6(SDA) and PB7(SCK) are I2C interface lines. You can use these to connect to an I2C device and get the sensor data.

794

795

796

We have made an example to show how to use the I2C interface to connect to the SHT20 Temperature and Humidity Sensor. This is supported in the stock firmware since v1.5 with **AT+MOD=1 (default value).**

797

798

799

Below is the connection to SHT20.

800

801

802

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image028.png]]

803

804

805

The device will be able to get the I2C sensor data now and upload to IoT Server.

806

807

808

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image029.png]]

809

810

Convert the read byte to decimal and divide it by ten.

**Example:**

Temperature: Read:0116(H) = 278(D) Value: 278 /10=27.8℃;

816

817

Humidity: Read:0248(H)=584(D) Value: 584 / 10=58.4, So 58.4%

818

819

820

If you want to use other I2C device, please refer the SHT20 part source code as reference.

821

822

823

=== 2.4.7 Distance Reading ===

824

825

Refer [[Ultrasonic Sensor section>>path:#Ultrasonic_Sensor]].

826

827

828

=== 2.4.8 Ultrasonic Sensor ===

829

830

The LSN50 v1.5 firmware supports ultrasonic sensor (with AT+MOD=2) such as SEN0208 from DF-Robot. This Fundamental Principles of this sensor can be found at this link: [[https:~~/~~/wiki.dfrobot.com/Weather_-_proof_Ultrasonic_Sensor_with_Separate_Probe_SKU~~_~~__SEN0208>>url:https://wiki.dfrobot.com/Weather_-_proof_Ultrasonic_Sensor_with_Separate_Probe_SKU___SEN0208]]

831

832

833

The LSN50 detects the pulse width of the sensor and converts it to mm output. The accuracy will be within 1 centimeter. The usable range (the distance between the ultrasonic probe and the measured object) is between 24cm and 600cm.

834

835

836

The picture below shows the connection:

837

838

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image003.png]]

Connect to the LSN50 and run **AT+MOD=2** to switch to ultrasonic mode (ULT).

843

844

The ultrasonic sensor uses the 8^^th^^ and 9^^th^^ byte for the measurement value.

**Example:**

Distance: Read:0C2D(Hex) = 3117(D) Value: 3117 mm=311.7 cm

850

851

852

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image030.png]]

853

854

855

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image031.png]]

You can see the serial output in ULT mode as below:

860

861

862

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image032.png]]

In TTN V3 server:

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image030.png]]

869

870

871

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image031.png]]

872

873

874

=== 2.4.9 +5V Output ===

875

876

Since v1.2 hardware version, a +5v output is added in the hardware. The +5V output will be valid for every sampling. LSN50 will enable +5V output before all sampling and disable the +5v after all sampling.

877

878

879

Since firmware **v1.6.3**, The 5V output time can be controlled by AT Command.

**AT+5VT=1000**

Means set 5V valid time to have 1000ms. So the real 5V output will actually have 1000ms + sampling time for other sensors.

884

885

886

By default the AT+5VT=500. If the external sensor which require 5v and require more time to get stable state, user can use this command to increase the power ON duration for this sensor.

=== 2.4.10 Weigh Sensor HX711 ===

892

893

Since v1.6.2 firmware, LSN50 support Weigh Sensor HX711.

894

895

896

=== 2.4.11 BH1750 Illumination Sensor ===

897

898

Since v1.7.0 firmware, MOD=1 support this sensor. The sensor value is in the 8^^th^^ and 9^^th^^ bytes.

899

900

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image033.jpg]]

901

902

903

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image034.png]]

=== 2.4.12 Working MOD ===

908

909

The working MOD info is contained in the Digital in & Digital Interrupt byte (7^^th^^ Byte).

910

911

912

User can use the 3^^rd^^ ~~ 7^^th^^ bit of this byte to see the working mod:

913

914

915

Case 7^^th^^ Byte >> 2 & 0x1f:

* 0: MOD1

* 1: MOD2

* 2: MOD3

* 3: MOD4

* 4:MOD5

* 5:MOD6

== 2.5 Configure LSN50 via AT or Downlink ==

926

927

User can configure LSN50 via [[AT Commands >>path:#_Using_the_AT]]or LoRaWAN Downlink Commands

928

929

There are two kinds of Commands:

930

931

* (% style="color:#4472c4" %)**Common Commands**(%%): They should be available for each sensor, such as: change uplink interval, reset device. For firmware v1.7.0, user can find what common commands it supports: http:~/~/wiki.dragino.com/index.php?title=End_Device_AT_Commands_and_Downlink_Commands

932

933

* (% style="color:#4472c4" %)**Sensor Related Commands**(%%): These commands are special designed for LSN50. User can see these commands below:

934

935

=== 2.5.1 Common Commands: ===

936

937

938

They should be available for each of Dragino Sensors, such as: change uplink interval, reset device. For firmware v1.7.0, user can find what common commands it supports: http:~/~/wiki.dragino.com/index.php?title=End_Device_AT_Commands_and_Downlink_Commands

939

940

941

=== 2.5.2 Sensor related commands: ===

942

943

944

(% style="color:#4472c4" %)**Set work mode:**

945

946

* (% style="color:#037691" %)AT Command:

947

948

AT+MOD=2 ~/~/ Set work MOD =2. (1:IIC mode,2:Distance mode,3:3ADC mode, 4:3DS18B20 mode,5:weight mode)

949

950

AT+MOD=? ~/~/ Get current work MOD

951

952

953

* (% style="color:#037691" %)Downlink Payload:

954

955

0x0A aa ~/~/ Same as AT+MOD=aa

(% style="color:#4472c4" %)**Set the trigger interrupt mode:**

960

961

* (% style="color:#037691" %)AT Command:

962

963

AT+INTMOD=2 ~/~/ Set INTMOD =2. (0:Disable,1:falling or rising,2:falling,3:rising)

964

965

AT+INTMOD=? ~/~/ Get current INTMOD

966

967

968

* (% style="color:#037691" %)Downlink Payload:

969

970

0x06 000003 ~/~/ Set AT+INTMOD=3

971

972

973

(% style="color:#4472c4" %)**Set the 5V power open time during sampling:**

974

975

976

* (% style="color:#037691" %)AT Command:

977

978

AT+5VT=1000 ~/~/ Set 5v open time to 1000ms

979

980

AT+5VT=? ~/~/ Check current 5v open duration

981

982

983

* (% style="color:#037691" %)Downlink Payload:

984

985

0x07 aa bb ~/~/ Equal AT+5VT=0x(aa bb)

(% style="color:#4472c4" %)**Set the weight to 0g (Zero Calibration)**

991

992

* (% style="color:#037691" %)AT Command:

993

994

AT+WEIGRE ~/~/ Set the weight to 0g

995

996

997

* (% style="color:#037691" %)Downlink Payload:

998

999

0x08 01 ~/~/ Set the weight to 0g

(% style="color:#4472c4" %)**Get or Set the GAP Value (calibrate factor) of measurement**

1004

1005

* (% style="color:#037691" %)AT Command:

1006

1007

AT+WEIGAP=403.0 ~/~/ Set GAP Value =403.0 (response: Weight: xx g)

1008

1009

AT+WEIGAP=? ~/~/ Get current GAP Value

1010

1011

1012

* (% style="color:#037691" %)Downlink Payload:

1013

1014

0x08 02 aa bb ~/~/ Equal to AT+WEIGAP=0x(aa bb)/10

== 2.6 Show Data in Datacake IoT Server ==

1023

1024

Datacake provides a human friendly interface to show the sensor data, once we have data in TTN V3, we can use Datacake to connect to TTN V3 and see the data in Datacake. Below are the steps:

1025

1026

1027

(% style="color:blue" %)Step 1(%%): Be sure that your device is programmed and properly connected to the network at this time.

1028

1029

(% style="color:blue" %)Step 2(%%): To configure the Application to forward data to Datacake you will need to add integration. To add the Datacake integration, perform the following steps:

1030

1031

1032

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image035.png]]

1033

1034

1035

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image036.png]]

1036

1037

1038

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image037.png]]

(% style="color:blue" %)Step 3(%%): Create an account or log in Datacake.

1043

1044

(% style="color:blue" %)Step 4(%%): Search the LSN50 and add DevEUI.

1045

1046

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image038.png]]

== 2.7 Firmware Change Log ==

1051

1052

~* [[**Firmware download link**>>url:https://github.com/dragino/LoRa_STM32/tree/master/LSN50.hex]]

1053

1054

[[http:~~/~~/www.dragino.com/downloads/index.php?dir=LSN50-LoRaST/Firmware/LSN50.hex/>>url:http://www.dragino.com/downloads/index.php?dir=LSN50-LoRaST/Firmware/LSN50.hex/]]

1055

1056

1057

**~* Firmware Change Log:**

1058

1059

[[http:~~/~~/www.dragino.com/downloads/index.php?dir=LSN50-LoRaST/Firmware/LSN50.hex/>>url:http://www.dragino.com/downloads/index.php?dir=LSN50-LoRaST/Firmware/LSN50.hex/]]

== 2.8 Use VDD or +5V to Power External Sensor ==

1065

1066

User can use VDD or +5V to power external sensor.

1067

1068

(% style="color:red" %)Note:

1069

1070

1. VDD is 2.5~~3.3v from the battery + diode, the VDD is always on, so when use VDD to power external sensor, make sure the sensor has a low power consumption in sleep mode ( less 50 uA) to get a long battery life.

1071

1. +5V output is only ON when sampling. And MCU will turn off it after sampling. So if sensor can support 5v, +5V out is the best choice. [[See here for more info>>path:#output_5v]].

1072

1073

(% style="color:red" %)Note: Always test the actually current pass by the JP2 jumper when connect to a new type of sensor.

== 2.9 Battery Analysis ==

1082

1083

=== 2.9.1 Battery Type ===

1084

1085

The LSN50 battery is a combination of a 4000mAh or 8500mAh Li/SOCI2 Battery and a Super Capacitor. The battery is non-rechargeable battery type with a low discharge rate (<2% per year). This type of battery is commonly used in IoT devices such as water meter.

1086

1087

1088

The battery is designed to last for more than 5 years for the LSN50.

1089

1090

1091

The battery related documents as below:

1092

1093

* [[Battery Dimension>>https://www.dragino.com/downloads/index.php?dir=datasheet/Battery/]],

1094

* [[Lithium-Thionyl Chloride Battery datasheet>>https://www.dragino.com/downloads/index.php?dir=datasheet/Battery/]], [[Tech Spec>>https://www.dragino.com/downloads/index.php?dir=datasheet/Battery/]]

1095

* [[Lithium-ion Battery-Capacitor datasheet>>https://www.dragino.com/downloads/index.php?dir=datasheet/Battery/]], [[Tech Spec>>https://www.dragino.com/downloads/index.php?dir=datasheet/Battery/]]

1096

1097

[[image:image-20220627175349-30.png]]

1098

1099

1100

=== 2.9.2 Power consumption Analyze ===

1101

1102

When connect to different sensors, it is good to test the power consumption with the sensor working. User can remove the [[ON/OFF Jumper>>path:#power_on]] of LSN50, and connect a multimeter between the two pins of this header and measure the current to know the whole system power consumption. Because the sleep mode will have as low as 10uA, at least 4.5 digit multimeter is required to measure this level of current.

1103

1104

A victor VC86E is recommended.

1105

1106

[[image:1656323400306-359.png]]

1107

1108

1109

In a minimum system with DS18B20 and Oil Sensor and default firmware, the power consumption includes:

1110

1111

1112

~1. Deep Sleep (Stop mode) for STM32. ~~ 5uA

1113

1114

2. Sampling current while reading DS18B20 and Oil Sensor

1115

1116

* Oil Sensor sampling time: 200us, current: 0.3mA

1117

* DS18B20 sampling time: 750ms, current: 0.64mA

1118

* Above power should add 8mA CPU power in working mode.

1119

1120

3. LoRaWAN transmit and receive time consumption. The LoRa TX / RX time and power can be found in the [[LoRa calculator tool>>url:https://www.semtech.com/uploads/documents/SX1272LoRaCalculatorSetup1_1.zip]].

1121

1122

1123

In a typical LoRaWAN data transmit. The energy profile is as below:

1124

1125

1126

[[image:1656323450362-299.png]]

1127

1128

In the LoRaWAN protocol, the device will transfer in different LoRa Radio, and have different energy profile in LoRa part. We can calculate the battery life in two cases:

1129

1130

1. Lower power LoRa radio. Device has a good signal to gateway

1131

1. Higher power LoRa radio. Device has a poor signal to gateway

1132

1133

(% style="color:blue" %)**Low Power Case**:

1134

1135

* Radio Parameter: SF7, 125kHz, 20dbm

1136

* Transmit interval: 15 minutes.

1137

* Payload: 8 Bytes.

1138

1139

(% style="color:blue" %)**High Power Case**:

1140

1141

* Radio Parameter: SF10, 125kHz, 20dbm

1142

* Transmit interval: 15 minutes.

1143

* Payload: 8 Bytes.

1144

1145

To simplify the calculation, we can:

1146

1147

* Combine oil sensor and DS18B20 sampling energy together to **751ms@8.64ma**

1148

1149

* Combine the two RX windows together.

1150

1151

There is a [[power consumption tool>>url:http://www.dragino.com/downloads/index.php?dir=LSN50-LoRaST/&file=Battery_Calculator_v1.0.xlsx]] for easy analysis. Below is the analysis result.

1152

1153

1154

[[image:1656323531520-949.png]]

1155

1156

[[image:1656323549994-233.png]]

1157

1158

1159

(% style="color:red" %)Note: Ignore the 18 year result, because the battery has a max 2% discharge per year.

1160

1161

1162

=== 2.9.3 Battery Note ===

1163

1164

(((

1165

The Li-SICO battery is designed for small current / long period application. It is not good to use a high current, short period transmit method. The recommended minimum period for use of this battery is 5 minutes. If you use a shorter period time to transmit LoRa, then the battery life may be decreased.

)))

=== 2.9.4 Replace the battery ===

1170

1171

(((

1172

You can change the battery in the LSN50.The type of battery is not limited as long as the output is between 3v to 3.6v. On the main board, there is a diode (D1) between the battery and the main circuit. If you need to use a battery with less than 3.3v, please remove the D1 and shortcut the two pads of it so there won’t be voltage drop between battery and main board.

)))

(((

The default battery pack of LSN50 includes a ER18505 plus super capacitor. If user can't find this pack locally, they can find ER18505 or equivalence, which will also work in most case. The SPC can enlarge the battery life for high frequency use (update period below 5 minutes).

)))

= 3. Using the AT Commands =

1182

1183

== 3.1 Access AT Commands ==

1184

1185

LSN50 supports AT Command set in the stock firmware. You can use a USB to TTL adapter to connect to LSN50 for using AT command, as below.

1186

1187

1188

(% style="color:#4472c4" %)**LSN50 v1 UART connection photo**

1189

1190

[[image:image-20220627165424-24.png||height="495" width="486"]]

1191

1192

1193

(% style="color:#4472c4" %)**LSN50 v2 UART connection photo**

1194

1195

[[image:image-20220627165424-25.png||height="483" width="988"]]

(((

In the PC, you need to set the serial baud rate to (% style="color:green" %)**9600**(%%) to access the serial console for LSN50. LSN50 will output system info once power on as below:

1200

)))

1201

1202

[[image:image-20220627165531-26.png]]

== 3.2 Common AT Command Sequence ==

1207

1208

1209

=== 3.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===

1210

1211

(% style="color:#037691" %)**If device has not joined network via OTAA:**

1212

1213

(% style="background-color:#dcdcdc" %)AT+FDR

1214

1215

(% style="background-color:#dcdcdc" %)AT+NJM=0

1216

1217

(% style="background-color:#dcdcdc" %)ATZ

1218

1219

1220

(% style="color:#037691" %)**If device already joined network:**

1221

1222

(% style="background-color:#dcdcdc" %)AT+NJM=0

1223

1224

(% style="background-color:#dcdcdc" %)ATZ

1225

1226

1227

=== 3.2.2 Single-channel ABP mode (Use with LG01/LG02) ===

1228

1229

See [[Sect 6.7>>path:#single_channel_mode]]

= 4. Upload Firmware =

1234

1235

(% style="color:red" %)**Notes**:

1236

1237

* Since image v1.3, the firmware will show version info during boot. If your device doesn't show version info, you may have a very old image version.

1238

* Always run AT+FDR to reset parameters to factory default after an update image.

1239

If the update is from image >= v1.3 to another image version >=v1.3, then the keys will be kept after running AT+FDR.

1240

Otherwise (e.g. from v1.2 to v1.3), AT+FDR may erase the keys.

1241

1242

== 4.1 Upload Firmware via Serial Port ==

1243

1244

The LSN50's AT Command port can be used for firmware upgrade. The hardware connection for upgrade firmware is as below:

1245

1246

1247

[[image:image-20220627163506-18.png||height="426" width="418"]]

1248

1249

1250

(% style="color:blue" %)**Step1**(%%)**:** Download [[flash loader>>url:https://www.st.com/content/st_com/en/products/development-tools/software-development-tools/stm32-software-development-tools/stm32-programmers/flasher-stm32.html]].

1251

1252

1253

(% style="color:blue" %)**Step2**(%%)**:** Download the [[LSN50 Image files>>url:https://github.com/dragino/LoRa_STM32/tree/master/LSN50.hex]].

1254

1255

1256

(% style="color:blue" %)**Step3**(%%)**: **Open flashloader; choose the correct COM port to update

1257

1258

[[image:image-20220627163821-19.png]]

1259

1260

1261

[[image:image-20220627163930-20.png||height="450" width="751"]]

1262

1263

1264

[[image:image-20220627164030-21.png||height="459" width="750"]]

1265

1266

(% style="color:blue" %)**Step4**(%%)**: **Switch SW1 back to flash state and push the RESET button.

1267

1268

The LSN50 will then run the new firmware.

1269

1270

1271

== 4.2 Upload Firmware via ST-Link V2 ==

1272

1273

You can use ST-LINK to upgrade firmware into LSN50. The hardware connection for upgrade firmware is as below:

1274

1275

[[image:1656319349131-664.png]]

Connection:

* ST-LINK v2 GND <~-~-> LSN50 GND

1280

* ST-LINK v2 SWCLK <~-~-> LSN50 PA14

1281

* ST-LINK v2 SWDIO <~-~-> LSN50 PA13

1282

* ST-LINK v2 RST <~-~->LSN50 NRST.

1283

1284

(% style="color:blue" %)**Step1:**(%%) Install [[ST-LINK driver>>url:https://www.stmicroelectronics.com.cn/content/st_com/en/products/development-tools/software-development-tools/stm32-software-development-tools/stm32-utilities/stsw-link009.html]] first and then install [[ST-LINK Utility>>url:https://www.st.com/content/st_com/en/products/development-tools/software-development-tools/stm32-software-development-tools/stm32-programmers/stsw-link004.html]]

1285

1286

1287

(% style="color:blue" %)**Step2**(%%): Download the [[LSN50 Image files>>url:https://github.com/dragino/LoRa_STM32/tree/master/LSN50.hex]].

1288

1289

1290

(% style="color:blue" %)**Step3:**(%%)** **Open ST-LINK utility, (% style="color:blue" %)**file ~-~-> open file**(%%) to select the image to be upgraded.

1291

1292

1293

(% style="color:blue" %)**Step4:**(%%)** **Click the “(% style="color:blue" %)**Program Verify**”(%%) button on ST-LINK.

1294

1295

1296

[[image:image-20220627164303-22.png]]

1297

1298

1299

(% style="color:blue" %)**Step5:**(%%)** **The led on the ST-LINK adapter will now blinking, and the ST-Link utility will pop up a download window. Click the start button to download the image to LSN50.

1300

1301

1302

(% style="color:red" %)NOTE: If this step fails, ST-LINK can't establish connection to LSN50, please try to swap SWDIO & SWCLK pin. Some ST-LINK v2 devices are incorrectly marked.

1303

1304

1305

[[image:image-20220627164303-23.png]]

= 5. Developer Guide =

1310

1311

(% style="display:none" %)

1312

1313

* Software Source Code Download : [[https:~~/~~/github.com/dragino/LoRa_STM32/tree/master/STM32CubeExpansion_LRWAN>>https://github.com/dragino/LoRa_STM32/tree/master/STM32CubeExpansion_LRWAN]]

1314

* Hardware Source Code Download: [[https:~~/~~/github.com/dragino/Lora/tree/master/LSN50>>https://github.com/dragino/Lora/tree/master/LSN50]]

1315

1316

LSN50 is an open source project, developer can use compile their firmware for customized applications. User can get the source code from:

1317

1318

* Software Source Code: [[https:~~/~~/github.com/dragino/LoRa_STM32/tree/master/STM32CubeExpansion_LRWAN>>url:https://github.com/dragino/LoRa_STM32/tree/master/STM32CubeExpansion_LRWAN]]

1319

* Hardware Design files: [[https:~~/~~/github.com/dragino/Lora/tree/master/LSN50>>url:https://github.com/dragino/Lora/tree/master/LSN50]]

1320

* Compile instruction: [[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/Firmware%20Compile%20Instruction%20~~-~~-%20STM32/>>http://wiki.dragino.com/xwiki/bin/view/Main/Firmware%20Compile%20Instruction%20--%20STM32/]]

1321

1322

Use Keil to open project file:

1323

1324

STM32CubeExpansion_LRWAN/Projects/Multi/Applications/LoRa/DRAGINO-LRWAN(AT)/MDK-ARM/STM32L072CZ-Nucleo/Lora.uvprojx

1325

1326

1327

In Keil, you can see what frequency band the code support.

1328

1329

[[image:image-20220627162417-15.png]]

1330

1331

1332

~1. If you want to change frequency, modify the Preprocessor Symbols.

1333

For example, change EU868 to US915

1334

1335

[[image:1656318662202-530.png]]

1336

1337

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image002.emz]]

2. Compile and build

[[image:image-20220627163212-17.png]]

= 6. FAQ =

== 6.1 Why there is 433/868/915 version? ==

1348

1349

(((

1350

Different countries have different rules for the ISM band for LoRa. Although the LoRa chip can support a wide range of Frequencies, we provide different versions of the hardware for best tune of the LoRa hardware part.

)))

== 6.2 What is the frequency range of LT LoRa part? ? ==

1355

1356

Different LT version supports different frequency range, below is the table for the working frequency and recommend bands for each model:

1357

1358

[[image:image-20220627155456-9.png]]

== 6.3 How to change the LoRa Frequency Bands/Region? ==

1363

1364

You can follow the instructions for [[how to upgrade image>>path:#3ygebqi]].

1365

When downloading the images, choose the required image file for download.

1366

1367

1368

== 6.4 Can I use Private LoRa protocol? ==

(((

(((

The stock firmware is based on LoRaWAN protocol. You can use a private LoRa protocol in LSN50. This section describes an example for base LoRa transfer. It is a reference/demo and we do not provide further software development support on this topic.

)))

(((

In this demo, we will show the communication between LoRa Shield and LSN50, both of them using the basic LoRa library. LSN50 will send a message to a LoRa Shield and the LoRa Shield will print it to the console.

)))

)))

(% style="color:#4472c4" %)**LoRa Shield + UNO**:

1383

1384

Use the [[LoRa Library>>url:http://www.dragino.com/downloads/index.php?dir=LSN50-LoRaST/LoRa_Raw_Example/Arduino/&file=LoRa.zip]] and upload the [[LoRa Receive>>http://www.dragino.com/downloads/downloads/LSN50-LoRaST/LoRa_Raw_Example/Arduino/LoRaReceiver.ino]] Sketch to Arduino.

Refs:

[[http:~~/~~/www.dragino.com/downloads/index.php?dir=LSN50-LoRaST/LoRa_Raw_Example/Arduino/&file=LoRa.zip>>url:http://www.dragino.com/downloads/index.php?dir=LSN50-LoRaST/LoRa_Raw_Example/Arduino/&file=LoRa.zip]]

1390

1391

[[http:~~/~~/www.dragino.com/downloads/downloads/LSN50-LoRaST/LoRa_Raw_Example/Arduino/LoRaReceiver.ino>>url:http://www.dragino.com/downloads/downloads/LSN50-LoRaST/LoRa_Raw_Example/Arduino/LoRaReceiver.ino]]

1392

1393

1394

Open the serial monitor to Arduino. The device acts as a LoRa Receiver and listen on the frequency 868.3Mhz by default.

1395

1396

1397

(% style="color:#4472c4" %)**LSN50**:

1398

1399

Use the <[[LoRa RAW code>>url:http://www.dragino.com/downloads/index.php?dir=LSN50-LoRaST/LoRa_Raw_Example/LSN50/&file=lora_send.zip]]> . The project file is in: MDK-ARM\STM32L072CZ-Nucleo\ Lora.uvprojx

1400

1401

[[Compile>>path:#19c6y18]] it and [[Upload>>path:#3ygebqi]] it to LSN50, the LSN50 will transfer on the frequency 868.3Mhz.

1402

1403

In the Arduino Console, it will see the received packets as below.

1404

1405

1406

[[image:image-20220627160116-10.png]]

1407

1408

1409

== 6.5 How to set up LSN50 to work in 8 channel mode ==

1410

1411

By default, the frequency bands US915, AU915, CN470 work in 72 frequencies. Many gateways are 8 channel gateways, and in this case, the OTAA join time and uplink schedule is long and unpredictable while the end node is hopping in 72 frequencies.

1412

1413

You can configure the end node to work in 8 channel mode by using the AT+CHE command. The 500kHz channels are always included for OTAA.

1414

1415

1416

For example, in (% style="color:blue" %)**US915**(%%) band, the frequency table is as below. By default, the end node will use all channels (0~~71) for OTAA Join process. After the OTAA Join, the end node will use these all channels (0~~71) to send uplink packets.

1417

1418

[[image:image-20220627160940-13.png]]

1419

1420

1421

When you use the TTN V3 network, the US915 frequency bands use are:

1422

1423

* 903.9 - SF7BW125 to SF10BW125

1424

* 904.1 - SF7BW125 to SF10BW125

1425

* 904.3 - SF7BW125 to SF10BW125

1426

* 904.5 - SF7BW125 to SF10BW125

1427

* 904.7 - SF7BW125 to SF10BW125

1428

* 904.9 - SF7BW125 to SF10BW125

1429

* 905.1 - SF7BW125 to SF10BW125

1430

* 905.3 - SF7BW125 to SF10BW125

1431

* 904.6 - SF8BW500

1432

1433

Because the end node is now hopping in 72 frequency, it makes it difficult for the devices to Join the TTN V3 network and uplink data. To solve this issue, you can access the device via the AT commands and run:

1434

1435

(% style="color:blue" %)**AT+CHE=2**

1436

1437

(% style="color:blue" %)**ATZ**

1438

1439

1440

to set the end node to work in 8 channel mode. The device will work in Channel 8-15 & 64-71 for OTAA, and channel 8-15 for Uplink.

1441

1442

The (% style="color:blue" %)**AU915**(%%) band is similar. Below are the AU915 Uplink Channels.

1443

1444

[[image:image-20220627161124-14.png]]

1445

1446

1447

== 6.6 How to set up LSN50 to work with Single Channel Gateway such as LG01/LG02? ==

1448

1449

In this case, users need to set LSN50 to work in ABP mode and transmit in only one frequency.

1450

1451

Assume we have a LG02 working in the frequency 868400000 now, below is the steps.

1452

1453

1454

(% style="color:blue" %)**Step1: **(%%)Log in TTN V3, Create an ABP device in the application and input the network session key (NETSKEY), app session key (APPSKEY) from the device.

1455

1456

1457

[[image:image-20220627160542-11.png]]

1458

1459

1460

(% style="color:red" %)Note: You need to make sure the above three keys match in the device and in TTN V3. You can change them either in TTN V3 or in the Device to make them match. In TTN V3, NETSKEY and APPSKEY can be configured in the setting page, but the Device Addr is generated by TTN V3.

1461

You can also change the Device ADDR in TTN V3 by using the [[The Things Network CLI>>url:https://www.thethingsnetwork.org/docs/network/cli/quick-start.html]].

1462

1463

1464

(% style="color:blue" %)**Step2: **(%%)Run AT commands to make the LSN50 work in Single frequency and ABP mode. Below are the AT commands:

1465

1466

1467

(% style="background-color:#dcdcdc" %)AT+FDR(%%) Reset Parameters to Factory Default, Keys Reserve

1468

1469

(% style="background-color:#dcdcdc" %)AT+NJM=0(%%) Set to ABP mode

1470

1471

(% style="background-color:#dcdcdc" %)AT+ADR=0(%%) Set the Adaptive Data Rate Off

1472

1473

(% style="background-color:#dcdcdc" %)AT+DR=5(%%) Set Data Rate (Set AT+DR=3 for 915 band)

1474

1475

(% style="background-color:#dcdcdc" %)AT+TDC=300000(%%) Set transmit interval to 5 minutes

1476

1477

(% style="background-color:#dcdcdc" %)AT+CHS=868400000(%%) Set transmit frequency to 868.4Mhz

1478

1479

(% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%) Set Device Address to 26 01 1A F1

1480

1481

(% style="background-color:#dcdcdc" %)ATZ(%%) Reset MCU

As shown below:

[[image:image-20220627160542-12.png]]

1487

1488

1489

== 6.7 How to configure the EUI keys in LSN50? ==

1490

1491

The early version of LSN50 firmware doesn't have pre-configured keys.

1492

It is recommended that you update the image to the latest version before configure the keys. Refer [[upgrade_image>>path:#3ygebqi]] to update the firmware to the latest version.

1493

1494

Run AT commands to set the keys to desired keys; refer [[AT Command manual>>path:#23ckvvd]].

1495

1496

1497

= 7. Trouble Shooting =

1498

1499

== 7.1 Connection problem when uploading firmware. ==

1500

1501

(% style="color:red" %)**Issue**(%%): While using USB to TTL to upload firmware via UART interface. It works for several times but most of times it fails.

1502

1503

1504

(% style="color:green" %)**Checklist**:

1505

1506

~1. Double check if follow up exactly the steps as manual.

1507

1508

2. Check if hardware works fine: a) check if AT command works, b) check if ISP / flash switch works: PA12 will have different output level while set the ISP/Flash Switch in different position. c) check if reset button works.

1509

1510

3. If you use Windows10 system. Please change the flash loader to run in Windows7 compatibility mode.

1511

1512

1513

[[image:image-20220627153421-8.png]]

1514

1515

4. We have seen cases where the FT232 USB TTL adapter has a reliability issue with the PC USB chipset (Intel). In this case, even though points 1 and 2 above work, it still has a reliability issue for uploading. If this happens, change to a different PC or change the USB to TTL adapter to solve the issue.

1516

1517

1518

== 7.2 Why I can't join TTN V3 in US915 / AU915 bands? ==

1519

1520

It is due to channel mapping. Please see the [[Eight Channel Mode>>path:#206ipza]] section above for details.

1521

1522

1523

7.3 AT Command input doesn't work

1524

1525

In the case if user can see the console output but can't type input to the device. Please check if you already include the (% style="color:red" %)**ENTER**(%%) while sending out the command. Some serial tool doesn't send (% style="color:red" %)**ENTER**(%%) while press the send key, user need to add ENTER in their string.

= 8. Order Info =

Part Number: (% style="color:blue" %)**LSN50-XX-YY **(%%)**or (% style="color:blue" %)LSN50-XX-YY-ZZ(%%)**

1532

1533

1534

(% style="color:blue" %)**XX**(%%): The default frequency band

1535

1536

* (% style="color:red" %)**AS923 **(%%)**:** LoRaWAN AS923 band

1537

* (% style="color:red" %)**AU915 **(%%)**:** LoRaWAN AU915 band

1538

* (% style="color:red" %)**EU433 **(%%)**:** LoRaWAN EU433 band

1539

* (% style="color:red" %)**EU868 **(%%)**:** LoRaWAN EU868 band

1540

* (% style="color:red" %)**KR920 **(%%)**:** LoRaWAN KR920 band

1541

* (% style="color:red" %)**US915 **(%%)**:** LoRaWAN US915 band

1542

* (% style="color:red" %)**IN865 **(%%)**:** LoRaWAN IN865 band

1543

* (% style="color:red" %)**CN470 **(%%)**:** LoRaWAN CN470 band

1544

1545

(% style="color:blue" %)**YY**(%%)**: **Hole Option

1546

1547

* (% style="color:red" %)**12**(%%): With M12 waterproof cable hole

1548

* (% style="color:red" %)**16**(%%): With M16 waterproof cable hole

1549

* (% style="color:red" %)**20**(%%): With M20 waterproof cable hole (LSN50 v2 doesn’t have this version)

1550

* (% style="color:red" %)**NH**(%%): No Hole

1551

1552

(% style="color:blue" %)**ZZ**(%%)**: **Battery Option ( Only valid for v2 model)

1553

1554

* (% style="color:red" %)**4**(%%): with 4000mAh battery

1555

* (% style="color:red" %)**8**(%%): with 8500mAg battery

= 9. Packing Info =

(% style="color:blue" %)**For LSN50**(%%)**:**

1561

1562

**Package Includes**:

1563

1564

* LSN50 LoRa Sensor Node x 1

1565

1566

**Dimension and weight**:

1567

1568

* Device Size: 8 x 6.5 x 5 cm

1569

* Device Weight: 137g

1570

* Package Size / pcs : 9 x 7 x 6cm

1571

* Weight / pcs : 160g

1572

1573

(% style="color:blue" %)**For LSN50 v2**(%%)**:**

1574

1575

**Package Includes**:

1576

1577

* LSN50 v2 LoRa Sensor Node x 1

1578

* External antenna x 1

1579

* Spring Antenna (evaluate purpose)

1580

1581

**Dimension and weight**:

1582

1583

* Device Size: 9.7 x 6.5 x 4.7 cm

1584

* Device Weight: 150g

1585

* Package Size / pcs : 14.0 x 8x 5 cm

1586

* Weight / pcs : 180g

(((

)))

= 10. Support =

* Support is provided Monday to Friday, from 09:00 to 18:00 GMT+8. Due to different timezones we cannot offer live support. However, your questions will be answered as soon as possible in the before-mentioned schedule.

1599

* Provide as much information as possible regarding your enquiry (product models, accurately describe your problem and steps to replicate it etc) and send a mail to [[support@dragino.com>>url:http://../../../../../../D:%5C%E5%B8%82%E5%9C%BA%E8%B5%84%E6%96%99%5C%E8%AF%B4%E6%98%8E%E4%B9%A6%5CLoRa%5CLT%E7%B3%BB%E5%88%97%5Csupport@dragino.com]].

= 11. References =

* [[Product Page>>url:http://www.dragino.com/products/lora/item/128-lsn50.html]]

1604

* [[Data Sheet>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/EN/&file=Datasheet_LoRaSensorNode.pdf]]

1605

* [[Image Download>>url:https://github.com/dragino/LoRa_STM32/tree/master/LSN50.hex]]

1606

* [[Mechanical Drawing>>http://www.dragino.com/downloads/index.php?dir=LSN50-LoRaST/Mechanical_Drawing/]]

1607

1608

Wiki source code of LSN50 & LSN50-V2 - LoRaWAN Sensor Node User Manual

Applications

Navigation