LSN50 & LSN50-V2 - LoRaWAN Sensor Node User Manual

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= 1. Introduction =

== 1.1 What is LSN50 LoRa Sensor Node ==

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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.

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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.

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(% 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.

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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.

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[[image:1656294562709-486.png]]

== 1.2 Specifications ==

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

* STM32L072CZT6 MCU

* MCU: STM32L072CZT6

* Flash: 192KB

* RAM: 20KB

* EEPROM: 6KB

* Clock Speed: 32Mhz

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

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* Supply Voltage: 2.1v ~~ 3.6v

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* Operating Temperature: -40 ~~ 85°C

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* I/O pins: Refer to STM32L072 datasheet

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

* Frequency Range,

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

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

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* 168 dB maximum link budget.

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

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* +14 dBm high efficiency PA.

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* Programmable bit rate up to 300 kbps.

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* High sensitivity: down to -148 dBm.

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

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* Excellent blocking immunity.

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

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* Fully integrated synthesizer with a resolution of 61 Hz .

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

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* Built-in bit synchronizer for clock recovery.

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* Preamble detection.

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* 127 dB Dynamic Range RSSI.

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

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* Packet engine up to 256 bytes with CRC.

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* LoRaWAN 1.0.2 Specification

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

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* Li/SOCI2 un-chargeable battery

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* Capacity: 4000mAh

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* Self Discharge: <1% / Year @ 25°C

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* Max continuously current: 130mA

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* Max boost current: 2A, 1 second

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

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* STOP Mode: 2.7uA @ 3.3v

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

== 1.3 Features ==

* LoRaWAN 1.0.3 Class A, Class C

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* STM32L072CZT6 MCU

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* SX1276/78 Wireless Chip

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* Pre-load bootloader on USART1/USART2

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* MDK-ARM Version 5.24a IDE

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* I2C, LPUSART1, USB, SPI2

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* 3x12bit ADC, 1x12bit DAC

* 20xDigital I/Os

* LoRa™ Modem

* Preamble detection

* Baud rate configurable

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* CN470/EU433/KR920/US915/IN865

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* EU868/AS923/AU915

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* Open-source hardware / software

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

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* IP66 Waterproof Enclosure

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* Ultra-Low Power consumption

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* AT Commands to change parameters

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

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== 1.4 Applications ==

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* Smart Buildings & Home Automation

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* Logistics and Supply Chain Management

* Smart Metering

* Smart Agriculture

* Smart Cities

* Smart Factory

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== 1.5 Pin Definitions and Switch ==

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

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

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

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=== 1.5.1 Jumper JP2 ===

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Power on Device when put this jumper.

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=== 1.5.2 BOOT MODE / SW1 ===

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~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.

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

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=== 1.5.3 Reset Button ===

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Press to reboot the device.

=== 1.5.4 LED ===

It will flash:

1. When boot the device in flash mode

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1. Send an uplink packet

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=== 1.6 Hardware Change log ===

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Note: Hardware version is marked in the PCB.

**LSN50 v2.1:**

1. Change R14 to 1M ohm

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

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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

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* Add pin PA4, PB13, NRST

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

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

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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:

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

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[[image:1656298089706-973.png]]

= 2. Use LSN50 with LoRaWAN firmware =

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== 2.1 How it works ==

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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.

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

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

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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.

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

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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.

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(% 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" %)(%%)

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

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

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

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**Register the device：**

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**Add APP EUI and DEV EUI：**

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**Add APP EUI in the application：**

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(% 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" %)

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(% 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" %)

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(% 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" %)(%%)

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

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

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

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(% style="display:none" %)

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

**For LSn50v2:**

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

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(% 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" %)(%%)

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(% 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.

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(% 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"]]

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(% 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" %)

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== 2.3 Working Mode & Uplink Payload ==

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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.

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

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(% 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.

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

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

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

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

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**Size (bytes)**

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

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

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

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ignore

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

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

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

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

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

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

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)))

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

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

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

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

Temperature

(DS18B20)

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

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Temperature

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(SHT20 or SHT31 or Ultrasonic Sensor)

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Humidity

(SHT20)

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

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==== ====

== 2.5 Configure LSN50v2-S31 ==

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LSN50V2-S31 supports configuration via LoRaWAN downlink command or AT Commands.

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* Downlink command instructions for different platform: [[Use Note for Server>>doc:Main.WebHome]](IoT LoRaWAN Server)

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* AT Command Access Instructions: [[LINK>>||anchor="H4.A0UseATCommand"]]

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There are two parts of commands: General one and Special for this model.

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=== 2.5.1 General Configure Commands ===

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These commands are to configure:

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* General system settings like: uplink interval.

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* LoRaWAN protocol & radio related command.

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These commands can be found on the wiki: [[End Device AT Commands and Downlink Commands>>doc:Main.End Device AT Commands and Downlink Command.WebHome]]

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=== 2.5.2 Sensor related commands ===

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==== (% style="color:red" %)**Set Temperature Alarm Threshold:**(%%) ====

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

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**AT+SHTEMP=min,max**

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* When min=0, and max≠0, Alarm higher than max

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* When min≠0, and max=0, Alarm lower than min

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* When min≠0 and max≠0, Alarm higher than max or lower than min

Example:

AT+SHTEMP=0,30 ~/~/ Alarm when temperature higher than 30.

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

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**0x(0C 01 00 1E)** ~/~/Set AT+SHTEMP=0,30

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(% style="color:red" %)(note: 3^^rd^^ byte= 0x00 for low limit(not set), 4^^th^^ byte = 0x1E for high limit: 30)

==== (% style="color:red" %)**Set Humidity Alarm Threshold:**(%%) ====

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

**AT+SHHUM=min,max**

* When min=0, and max≠0, Alarm higher than max

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* When min≠0, and max=0, Alarm lower than min

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* When min≠0 and max≠0, Alarm higher than max or lower than min

Example:

AT+SHHUM=70,0 ~/~/ Alarm when humidity lower than 70%.

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

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**0x(0C 02 46 00)** ~/~/Set AT+SHTHUM=70,0

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(% style="color:red" %)(note: 3^^rd^^ byte= 0x46 for low limit (70%), 4^^th^^ byte = 0x00 for high limit (not set))

==== (% style="color:red" %)**Set Alarm Interval:**(%%) ====

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The shortest time of two Alarm packet. (unit: min)

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

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**AT+ATDC=30** ~/~/ The shortest interval of two Alarm packets is 30 minutes, Means is there is an alarm packet uplink, there won't be another one in the next 30 minutes.

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

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**0x(0D 00 1E)** **~-~-->** Set AT+ATDC=0x 00 1E = 30 minutes

==== (% style="color:red" %)**Poll the Alarm settings:**(%%) ====

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Send a LoRaWAN downlink to ask device send Alarm settings.

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

0x0E 01

**Example:**

[[image:1655972693463-687.png]]

**Explain:**

* Alarm & MOD bit is 0x7C, 0x7C >> 2 = 0x31: Means this message is the Alarm settings message.

== 2.6 LED Status ==

LSN50-v2-S31 has an internal LED, it will active in below situation:

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* LED will fast blink 5 times when boot, this means the temperature sensor is detected.

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* After the fast blinks on boot, the LED will flash once which means device is trying to send Join Packet to the network.

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* If device successful join LoRaWAN network, the LED will be solid on for 5 seconds.

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== 2.7 Button Function ==

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**Internal RESET button:**

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Press this button will reboot the device. Device will process OTAA Join to network again.

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== (% style="color:inherit; font-family:inherit; font-size:26px" %)2.8 Firmware Change Log(%%) ==

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Firmware version and change log please see: [[**See this link**>>url:http://www.dragino.com/downloads/index.php?dir=LSN50-LoRaST/Firmware/LSN50.hex/]]**.**

= 3. Battery Info =

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The LSN50v2-S31 battery is a combination of a 8500mAh ER26500 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.

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The battery is designed to last for more than 5 years for the LSN50v2-S31.

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The battery related documents can be found as below:

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[[http:~~/~~/www.dragino.com/downloads/index.php?dir=datasheet/Battery/ER26500/>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/ER26500/]]

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The connector is as below incase user want to use their own battery

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)))

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(% aria-label="image-20220607172042-11.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:image-20220607172042-11.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"]](% 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; left:0px; top:-15px" 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:url(~"http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png~") rgba(220, 220, 220, 0.5); left:0px; top:-15px" tabindex="-1" %)(%%)

567

568

(((

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There are several parameters affect the battery power. Please see consumption report from here for the detail explain:

)))

(((

[[http:~~/~~/www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LSN50v2-S31/Test_Report/>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LSN50v2-D20/Test_Report/]]

)))

(((

)))

= 3. Using the AT Commands =

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== 3.1 Access AT Commands ==

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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.

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

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

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

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[[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:

600

)))

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

== 3.2 Common AT Command Sequence ==

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

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

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

614

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

616

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

618

619

620

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

621

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

623

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

625

626

627

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

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

= 4. Upload Firmware =

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

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* 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.

638

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

639

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

640

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

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643

== 4.1 Upload Firmware via Serial Port ==

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

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

649

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(% 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]].

652

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

655

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

658

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

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

663

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665

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

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667

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

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669

The LSN50 will then run the new firmware.

670

671

672

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

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

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[[image:1656319349131-664.png]]

Connection:

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

681

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

682

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

683

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

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685

(% 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]]

686

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688

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

689

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691

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

692

693

694

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

695

696

697

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

698

699

700

(% 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.

701

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703

(% 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.

704

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

= 5. Developer Guide =

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712

(% style="display:none" %)

713

714

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

715

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

716

717

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

718

719

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

720

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

721

* 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/]]

722

723

Use Keil to open project file:

724

725

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

726

727

728

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

729

730

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

731

732

733

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

734

For example, change EU868 to US915

735

736

[[image:1656318662202-530.png]]

737

738

[[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? ==

749

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(((

751

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? ? ==

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757

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

758

759

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

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

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765

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

766

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

767

768

769

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

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(((

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.

)))

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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**:

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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]]

791

792

[[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]]

793

794

795

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

796

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

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800

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

801

802

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

803

804

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

805

806

807

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

808

809

810

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

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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.

813

814

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.

815

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817

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.

818

819

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

820

821

822

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

823

824

* 903.9 - SF7BW125 to SF10BW125

825

* 904.1 - SF7BW125 to SF10BW125

826

* 904.3 - SF7BW125 to SF10BW125

827

* 904.5 - SF7BW125 to SF10BW125

828

* 904.7 - SF7BW125 to SF10BW125

829

* 904.9 - SF7BW125 to SF10BW125

830

* 905.1 - SF7BW125 to SF10BW125

831

* 905.3 - SF7BW125 to SF10BW125

832

* 904.6 - SF8BW500

833

834

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:

835

836

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

837

838

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

839

840

841

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.

842

843

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

844

845

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

846

847

848

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

849

850

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

851

852

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

853

854

855

(% 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.

856

857

858

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

859

860

861

(% 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.

862

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]].

863

864

865

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

866

867

868

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

869

870

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

871

872

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

873

874

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

875

876

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

877

878

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

879

880

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

881

882

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

As shown below:

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

888

889

890

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

891

892

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

893

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.

894

895

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

896

897

898

= 7. Trouble Shooting =

899

900

== 7.1 Connection problem when uploading firmware. ==

901

902

(% 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.

903

904

905

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

906

907

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

908

909

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.

910

911

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

912

913

914

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

915

916

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.

917

918

919

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

920

921

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

922

923

924

7.3 AT Command input doesn't work

925

926

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(%%)**

933

934

935

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

936

937

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

938

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

939

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

940

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

941

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

942

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

943

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

944

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

945

946

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

947

948

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

949

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

950

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

951

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

952

953

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

954

955

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

956

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

= 9. Packing Info =

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

962

963

**Package Includes**:

964

965

* LSN50 LoRa Sensor Node x 1

966

967

**Dimension and weight**:

968

969

* Device Size: 8 x 6.5 x 5 cm

970

* Device Weight: 137g

971

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

972

* Weight / pcs : 160g

973

974

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

975

976

**Package Includes**:

977

978

* LSN50 v2 LoRa Sensor Node x 1

979

* External antenna x 1

980

* Spring Antenna (evaluate purpose)

981

982

**Dimension and weight**:

983

984

* Device Size: 9.7 x 6.5 x 4.7 cm

985

* Device Weight: 150g

986

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

987

* 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.

1000

* 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]]

1005

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

1006

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

1007

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

1008

1009

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

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