RS485-LN – RS485 to LoRaWAN Converter User Manual

1

(% aria-label="1653266934636-343.png image widget" contenteditable="false" role="region" tabindex="-1" %)

2

(((

3

(% data-widget="image" style="text-align:center" %)

4

[[image:1653266934636-343.png||height="385" width="385"]](% title="Click and drag to resize" %)

5

6

(% style="background-image:url(http://wiki.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"]]

)))

**Table of Contents:**

(% aria-label="macro:toc widget" contenteditable="false" role="region" tabindex="-1" %)

21

(((

22

(% style="background-image:url(http://wiki.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"]]

)))

= 1. Introduction =

== 1.1 What is RS485-LN RS485 to LoRaWAN Converter ==

(((

The Dragino RS485-LN is a (% style="color:blue" %)**RS485 to LoRaWAN Converter**(%%). It converts the RS485 signal into LoRaWAN wireless signal which simplify the IoT installation and reduce the installation/maintaining cost.

)))

(((

RS485-LN allows user to (% style="color:blue" %)**monitor / control RS485 devices**(%%) and reach extremely long ranges. 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, building automation, and so on.

)))

(((

(% style="color:blue" %)**For data uplink**(%%), RS485-LN sends user-defined commands to RS485 devices and gets the return from the RS485 devices. RS485-LN will process these returns according to user-define rules to get the final payload and upload to LoRaWAN server.

)))

(((

(% style="color:blue" %)**For data downlink**(%%), RS485-LN runs in LoRaWAN Class C. When there downlink commands from LoRaWAN server, RS485-LN will forward the commands from LoRaWAN server to RS485 devices.

)))

(((

(% style="color:blue" %)**Demo Dashboard for RS485-LN**(%%) connect to two energy meters: [[https:~~/~~/app.datacake.de/dashboard/d/58844a26-378d-4c5a-aaf5-b5b5b153447a>>url:https://app.datacake.de/dashboard/d/58844a26-378d-4c5a-aaf5-b5b5b153447a]]

)))

(% aria-label="1653267211009-519.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:1653267211009-519.png||data-widget="image" height="419" width="724"]](% style="background-image:url(http://wiki.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" %)

58

59

60

== 1.2 Specifications ==

61

62

63

(% style="color:#037691" %)**Hardware System:**

64

65

* STM32L072xxxx MCU

66

* SX1276/78 Wireless Chip

67

* Power Consumption (exclude RS485 device):

68

** Idle: 32mA@12v

69

** 20dB Transmit: 65mA@12v

70

71

(% style="color:#037691" %)**Interface for Model:**

72

73

* RS485

74

* Power Input 7~~ 24V DC.

75

76

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

77

78

* Frequency Range:

79

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

80

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

81

* 168 dB maximum link budget.

82

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

83

* +14 dBm high efficiency PA.

84

* Programmable bit rate up to 300 kbps.

85

* High sensitivity: down to -148 dBm.

86

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

87

* Excellent blocking immunity.

88

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

89

* Fully integrated synthesizer with a resolution of 61 Hz.

90

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

91

* Built-in bit synchronizer for clock recovery.

92

* Preamble detection.

93

* 127 dB Dynamic Range RSSI.

94

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

95

* Packet engine up to 256 bytes with CRC

== 1.3 Features ==

* LoRaWAN Class A & Class C protocol (default Class C)

101

* Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/IN865/RU864/MA869

102

* AT Commands to change parameters

103

* Remote configure parameters via LoRa Downlink

104

* Firmware upgradable via program port

105

* Support multiply RS485 devices by flexible rules

106

* Support Modbus protocol

107

* Support Interrupt uplink (Since hardware version v1.2)

108

109

== 1.4 Applications ==

110

111

112

* Smart Buildings & Home Automation

113

* Logistics and Supply Chain Management

* Smart Metering

* Smart Agriculture

* Smart Cities

* Smart Factory

== 1.5 Firmware Change log ==

120

121

122

[[RS485-LN Image files – Download link and Change log>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/]]

123

124

125

== 1.6 Hardware Change log ==

(((

(((

(((

v1.2: Add External Interrupt Pin.

)))

(((

v1.0: Release

)))

== 1.7 Pin Definitions ==

140

141

142

The following diagram shows the V1.2 hardware version.

143

144

[[image:image-20240925161141-1.jpeg||height="412" width="405"]]

145

146

[[image:image-20240925161157-2.jpeg||height="367" width="545"]]

)))

)))

= 2. Power ON Device =

(((

The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below

157

158

* Power Source VIN to RS485-LN VIN+

159

* Power Source GND to RS485-LN VIN-

160

161

(((

162

Once there is power, the RS485-LN will be on.

163

)))

164

165

(% aria-label="1653268091319-405.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:1653268091319-405.png||data-widget="image"]](% style="background-image:url(http://wiki.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" %)

)))

= 3. Operation Mode =

171

172

== 3.1 How it works? ==

(((

(((

The RS485-LN is configured as LoRaWAN OTAA Class C mode by default. It has OTAA keys to join network. To connect a local LoRaWAN network, user just need to input the OTAA keys in the network server and power on the RS485-LN. It will auto join the network via OTAA.

)))

)))

== 3.2 Example to join LoRaWAN network ==

184

185

186

Here shows an example for how to join the TTN V3 Network. Below is the network structure, we use [[LG308>>url:http://www.dragino.com/products/lora-lorawan-gateway/item/140-lg308.html]] as LoRaWAN gateway here.

187

188

189

(% aria-label="1653268155545-638.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:1653268155545-638.png||data-widget="image" height="334" width="724"]](% style="background-image:url(http://wiki.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" %)

(((

(((

The RS485-LN in this example connected to two RS485 devices for demonstration, user can connect to other RS485 devices via the same method. The connection is as below:

)))

(((

485A+ and 485B- of the sensor are connected to RS485A and RA485B of RS485-LN respectively.

)))

(% aria-label="1653268227651-549.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:1653268227651-549.png||data-widget="image" height="592" width="720"]](% style="background-image:url(http://wiki.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" %)

(((

The LG308 is already set to connect to [[TTN V3 network >>path:https://www.thethingsnetwork.org/]]. So what we need to now is only configure the TTN V3:

)))

(((

(% style="color:blue" %)**Step 1**(%%): Create a device in TTN V3 with the OTAA keys from RS485-LN.

)))

(((

Each RS485-LN is shipped with a sticker with unique device EUI:

)))

)))

(% style="background-image:url(http://wiki.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:image-20230425175410-2.png]](% title="Click and drag to resize" %)

(((

(((

User can enter this key in their LoRaWAN Server portal. Below is TTN V3 screen shot:

)))

(((

**Add APP EUI in the application.**

)))

)))

(% aria-label="image-20220519174512-1.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:image-20220519174512-1.png||data-widget="image"]](% style="background-image:url(http://wiki.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" %)

237

238

(% aria-label="image-20220519174512-2.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:image-20220519174512-2.png||data-widget="image" height="323" width="720"]](% style="background-image:url(http://wiki.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" %)

239

240

(% aria-label="image-20220519174512-3.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:image-20220519174512-3.png||data-widget="image" height="556" width="724"]](% style="background-image:url(http://wiki.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" %)

241

242

(% aria-label="image-20220519174512-4.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:image-20220519174512-4.png||data-widget="image"]](% style="background-image:url(http://wiki.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"]]

243

244

245

(% title="Click and drag to resize" %)

246

247

You can also choose to create the device manually.

248

249

(% aria-label="1652953542269-423.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:1652953542269-423.png||data-widget="image" height="710" width="723"]](% style="background-image:url(http://wiki.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 and DEV EUI**

254

255

(% aria-label="1652953553383-907.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:1652953553383-907.png||data-widget="image" height="514" width="724"]](% style="background-image:url(http://wiki.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" %)

(((

(% style="color:blue" %)**Step 2**(%%): Power on RS485-LN and it will auto join to the TTN V3 network. After join success, it will start to upload message to TTN V3 and user can see in the panel.

)))

(% aria-label="1652953568895-172.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:1652953568895-172.png||data-widget="image" height="232" width="724"]](% style="background-image:url(http://wiki.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" %)

265

266

267

== 3.3 Configure Device to Read RS485 Sensors ==

268

269

270

There are plenty of RS485 and TTL level devices in the market and each device has different commands to read the valid data. To support these devices in most flexible, RS485-LN supports flexible command set. User can use [[Dragino RS485 Tool>>url:https://www.dropbox.com/sh/us9qecn39fwt8n1/AABREdqUCzEmJMRrfuWuXasoa?dl=0]], [[AT Commands or LoRaWAN Downlink>>url:http://wiki.dragino.com/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/RS485-LB_Waterproof_RS485UART_to_LoRaWAN_Converter/#H3.5ConfigureRS485-LBviaATorDownlink]] Command to configure how RS485-LN should read the sensor and how to handle the return from RS485 or TTL sensors.

(((

(((

(((

(% style="color:red" %)**Note: below description and commands are for firmware version >v1.1, if you have firmware version v1.0. Please check the [[user manual v1.0>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/&file=RS485-LN_UserManual_v1.0.1.pdf]] or upgrade the firmware to v1.1**

)))

=== 3.3.1 Method 1 ~-~- via RS485 Configure Tool ===

281

282

283

Use the RS485 Configure tool is the recommand method. Please see the instruction of how to use the tool:

284

285

* **[[RS485 Configure Tool Instruction>>url:http://wiki.dragino.com/xwiki/bin/view/Main/RS485_Configure_Tool/]]**

286

287

[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/RS485-LB_Waterproof_RS485UART_to_LoRaWAN_Converter/WebHome/image-20231127144411-1.png?width=494&height=368&rev=1.1||alt="image-20231127144411-1.png" height="368" width="494"]]

288

289

290

=== 3.3.2 Method 2 ~-~- via AT Commands ===

)))

)))

==== 3.3.2.1 Configure UART settings for RS485 communication ====

295

296

297

To use RS485-LN to read data from RS485 sensors, connect the RS485-LN A/B traces to the sensors. The related commands for UART settings are:

298

299

(% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)

300

|=(% style="width: 126px; background-color:#4F81BD;color:white" %)(((

301

**AT Commands**

302

)))|=(% style="width: 187px; background-color:#4F81BD;color:white" %)(((

303

**Description**

304

)))|=(% style="width: 197px;background-color:#4F81BD;color:white" %)(((

305

**Example**

306

)))

307

|(% style="width:126px" %)(((

(((

AT+BAUDR

)))

)))|(% style="width:177px" %)(((

314

Set the baud rate (for RS485 connection). Default Value is: 9600.

315

)))|(% style="width:193px" %)(((

(((

AT+BAUDR=9600

)))

(((

Options: (1200,2400,4800,

14400,19200,115200)

)))

)))

|(% style="width:126px" %)(((

326

AT+PARITY

327

)))|(% style="width:177px" %)(((

328

Set UART parity (for RS485 connection)

329

)))|(% style="width:193px" %)(((

(((

AT+PARITY=0

)))

(((

Option: 0: no parity,

1: odd parity,

2: even parity

)))

)))

|(% style="width:126px" %)(((

341

AT+STOPBIT

342

)))|(% style="width:177px" %)(((

343

(((

344

Set serial stopbit (for RS485 connection)

345

)))

346

)))|(% style="width:193px" %)(((

347

(((

348

AT+STOPBIT=0 for 1bit

)))

(((

AT+STOPBIT=1 for 1.5 bit

)))

(((

AT+STOPBIT=2 for 2 bits

)))

)))

=== 3.3.3 Configure sensors ===

(((

Some sensors might need to configure before normal operation. User can configure such sensor via PC and RS485 adapter or through RS485-LN AT Commands (% style="color:#4f81bd" %)**AT+CFGDEV**(%%). Each (% style="color:#4f81bd" %)**AT+CFGDEV **(%%)equals to send a RS485 command to sensors. This command will only run when user input it and won't run during each sampling.

365

)))

366

367

(% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)

368

|=(% style="width: 122px; background-color:#4F81BD;color:white" %)**AT Commands**|=(% style="width: 198px; background-color:#4F81BD;color:white" %)**Description**|=(% style="width: 190px;background-color:#4F81BD;color:white" %)**Example**

369

|(% style="width:122px" %)AT+CFGDEV|(% style="width:196px" %)(((

370

(((

371

This command is used to configure the RS485/TTL devices; they won’t be used during sampling.

)))

(((

AT+CFGDEV=xx xx xx xx xx xx xx xx xx xx xx xx,

)))

(((

mm: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command

380

)))

381

)))|(% style="width:190px" %)AT+CFGDEV=xx xx xx xx xx xx xx xx xx xx xx xx,m

382

383

=== 3.3.4 Configure read commands for each sampling ===

(((

During each sampling, we need confirm what commands we need to send to the RS485 sensors to read data. After the RS485 sensors send back the value, it normally include some bytes and we only need a few from them for a shorten payload.

388

389

To save the LoRaWAN network bandwidth, we might need to read data from different sensors and combine their valid value into a short payload.

390

391

This section describes how to achieve above goals.

392

393

During each sampling, the RS485-LN can support 15 commands to read sensors. And combine the return to one or several uplink payloads.

394

395

396

(% style="color:#037691" %)**Each RS485 commands include two parts:**

397

398

399

~1. What commands RS485-LN will send to the RS485 sensors. There are total 15 commands from **AT+COMMAD1**, **ATCOMMAND2**,…, to **AT+COMMANDF**. All commands are of same grammar.

400

401

2. How to get wanted value the from RS485 sensors returns from by 1). There are total 15 AT Commands to handle the return, commands are **AT+DATACUT1**,**AT+DATACUT2**,…, **AT+DATACUTF** corresponding to the commands from 1). All commands are of same grammar.

402

403

3. Some RS485 device might has longer delay on reply, so user can use AT+CMDDL to set the timeout for getting reply after the RS485 command is sent. For example **AT+CMDDL1=1000** to send the open time to 1000ms

404

405

406

After we got the valid value from each RS485 commands, we need to combine them together with the command **AT+DATAUP**.

407

408

Below are examples for the how above AT Commands works.

409

410

411

(% style="color:#037691" %)**AT+COMMANDx **(%%)**: **This command will be sent to RS485 devices during each sampling, Max command length is 14 bytes. The grammar is:

412

413

(% border="1" style="background-color:#f2f2f2; width:499px" %)

414

|(% style="width:496px" %)(((

415

**AT+COMMANDx=xx xx xx xx xx xx xx xx xx xx xx xx,m**

416

417

**xx xx xx xx xx xx xx xx xx xx xx xx: The RS485 command to be sent**

418

419

**m: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command**

420

)))

421

422

For example, if we have a RS485 sensor. The command to get sensor value is: 01 03 0B B8 00 02 46 0A. Where 01 03 0B B8 00 02 is the Modbus command to read the register 0B B8 where stored the sensor value. The 46 0A is the CRC-16/MODBUS which calculate manually.

423

424

In the RS485-LN, we should use this command AT+COMMAND1=01 03 0B B8 00 02,1 for the same.

425

426

427

If a single command exceeds 14 bytes, you can use the command splicing function.

428

429

When AT+CMDDLx=1, the commands of AT+COMMANDx and AT+COMMAND(x+1) will be merged.

430

431

432

**Examples:** To send 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F data it should be configured:

433

434

AT+COMMAND1=00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D,0

AT+COMMAND1=1

AT+COMMAND2=0E 0F,0

(% style="color:#037691" %)**AT+DATACUTx **(%%)**: **This command defines how to handle the return from AT+COMMANDx, max return length is 100 bytes.

442

443

(% border="1" style="background-color:#f2f2f2; width:510px" %)

444

|(% style="width:510px" %)(((

445

**AT+DATACUTx=a,b,c**

446

447

* **a: length for the return of AT+COMMAND**

448

* **b:1: grab valid value by byte, max 6 bytes. 2: grab valid value by bytes section, max 3 sections.**

449

* **c: define the position for valid value. **

)))

**Examples:**

* (% style="color:#037691" %)**Grab bytes**

456

457

(% aria-label="image-20220602153621-1.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:image-20220602153621-1.png||data-widget="image"]](% style="background-image:url(http://wiki.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" %)

* (% style="color:#037691" %)**Grab a section**

462

463

(% aria-label="image-20220602153621-2.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:image-20220602153621-2.png||data-widget="image"]](% style="background-image:url(http://wiki.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" %)

* (% style="color:#037691" %)**Grab different sections**

468

469

(% aria-label="image-20220602153621-3.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:image-20220602153621-3.png||data-widget="image"]](% style="background-image:url(http://wiki.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" %)

)))

=== 3.3.5 Compose the uplink payload ===

(((

Through AT+COMMANDx and AT+DATACUTx we got valid value from each RS485 commands, Assume these valid value are RETURN1, RETURN2, .., to RETURNx. The next step is how to compose the LoRa Uplink Payload by these RETURNs. The command is **AT+DATAUP.**

)))

(((

(% style="color:#037691" %)**Examples: AT+DATAUP=0**

)))

(((

Compose the uplink payload with value returns in sequence and send with (% style="color:red" %)**A SIGNLE UPLINK**.

)))

(((

Final Payload is (% style="color:#4f81bd" %)**Battery Info+PAYVER + VALID Value from RETURN1 + Valid Value from RETURN2 + … + RETURNx**

)))

(((

Where PAYVER is defined by AT+PAYVER, below is an example screen shot.

)))

[[image:image-20220929111027-1.png||height="509" width="685"]](% title="Click and drag to resize" %)

504

505

506

(% style="color:#037691" %)**Examples: AT+DATAUP=1**

507

508

509

Compose the uplink payload with value returns in sequence and send with (% style="color:red" %)**Multiply UPLINKs**.

510

511

Final Payload is (% style="color:#4f81bd" %)**PAYVER + PAYLOAD COUNT + PAYLOAD# + DATA**

512

513

514

~1. PAYVER: Defined by AT+PAYVER

515

516

2. PAYLOAD COUNT: Total how many uplinks of this sampling.

517

518

3. PAYLOAD#: Number of this uplink. (from 0,1,2,3…,to PAYLOAD COUNT)

519

520

4. DATA: Valid value: max 8 bytes for each uplink so each uplink <= 11 bytes. For the last uplink, DATA will might less than 8 bytes

521

522

523

(% aria-label="image-20220602155039-4.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:image-20220602155039-4.png||data-widget="image"]](% style="background-image:url(http://wiki.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" %)

524

525

526

So totally there will be 3 uplinks for this sampling, each uplink include 8 bytes DATA

527

528

DATA1=RETURN1 Valid Value + the first two of Valid value of RETURN10= **20 20 0a 33 90 41 02 aa**

529

530

DATA2=3^^rd^^ ~~ 10^^th^^ byte of Valid value of RETURN10= **05 81 0a 20 20 20 20 2d**

531

532

DATA3=the rest of Valid value of RETURN10= **30**

533

534

535

(% style="color:red" %)**Notice: In firmware v1.3, the Max bytes has been changed according to the max bytes in different Frequency Bands for lowest SF. As below:**

536

537

538

~* For AU915/AS923 bands, if UplinkDwell time=0, max 51 bytes for each uplink.

539

540

* For AU915/AS923 bands, if UplinkDwell time=0, max 11 bytes for each uplink.

541

542

* For US915 band, max 11 bytes for each uplink.

543

544

~* For all other bands: max 51 bytes for each uplink.

545

546

547

(% style="color:red" %)** When AT+DATAUP=1, the maximum number of segments is 15, and the maximum total number of bytes is 1500;**

548

549

(% style="color:red" %)** When AT+DATAUP=1 and AT+ADR=0, the maximum number of bytes of each payload is determined by the DR value. (Since v1.4.0)**

Below are the uplink payloads:

554

555

556

(% aria-label="1654157178836-407.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:1654157178836-407.png||data-widget="image"]](% style="background-image:url(http://wiki.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" %)

557

558

559

=== 3.3.6 Uplink on demand ===

560

561

562

Except uplink periodically, RS485-LN is able to uplink on demand. The server send downlink command to RS485-LN and RS485 will uplink data base on the command.

563

564

(% style="color:blue" %)**Downlink control command:**

565

566

(% style="color:#4472c4" %)** 0x08 command**(%%): Poll an uplink with current command set in RS485-LN.

567

568

(% style="color:#4472c4" %)** 0xA8 command**(%%): Send a command to RS485-LN and uplink the output from sensors.

569

570

571

=== 3.3.7 Uplink on Interrupt ===

572

573

574

RS485-LN support external Interrupt uplink since hardware v1.2 release.

575

576

(% aria-label="1654157342174-798.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:1654157342174-798.png||data-widget="image"]](% style="background-image:url(http://wiki.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"]]

577

578

(% title="Click and drag to resize" %)(%%)When there is a high voltage (3.3v and above, the maximum is 24V, but not more than 12v is recommended) on (% style="color:blue" %)**INT**(%%) pin. At this point, an interrupt is triggered and the Device will send an uplink packet.

**Example:**

* Use a dry contact to connect the (% style="color:blue" %)**INT**(%%) pin and (% style="color:blue" %)**VIN+**(%%) pin of the RS485-LN.

583

584

When the dry contact is closed, INT and VIN+ conduct, and INT goes high, which triggers an interrupt, and the node sends an uplink message.

== 3.4 Uplink Payload ==

590

591

592

(% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)

593

|(% style="background-color:#4f81bd; color:white; width:70px" %)(((

594

**Size(bytes)**

595

)))|(% style="background-color:#4f81bd; color:white; width:80px" %)**1**|(% style="background-color:#4f81bd; color:white; width:360px" %)(((

596

**Length depends on the return from the commands**

597

)))

598

|(% style="width:90px" %)(((

599

Value

600

)))|(% style="width:114px" %)(((

601

PAYLOAD_VER

602

)))|(% style="width:353px" %)(((

603

If the valid payload is too long and exceed the maximum

604

605

support payload length in server, server will show payload not

606

607

provided in the LoRaWAN server.

608

)))

609

610

(% style="background-image:url(http://wiki.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"]](%%)Below is the decoder for the first 3 bytes. The rest bytes are dynamic depends on different RS485 sensors.

611

612

613

== 3.5 Configure RS485-LN via AT or Downlink ==

(((

User can configure RS485-LN via AT Commands or LoRaWAN Downlink Commands

)))

(((

There are two kinds of Commands:

)))

* (((

(% style="color:#4f81bd" %)**Common Commands**(%%): They should be available for each sensor, such as: change uplink interval, reset device. For firmware v1.3, user can find what common commands it supports: [[AT Commands and Downlink Command>>doc:Main.End Device AT Commands and Downlink Command.WebHome]]

)))

* (((

(% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for RS485-LN. User can see these commands below:

)))

(((

)))

=== 3.5.1 Common Commands ===

638

639

640

They should be available for each of Dragino Sensors, such as: change uplink interval, reset device. For firmware v1.3, user can find what common commands it supports: [[End Device AT Commands and Downlink Command>>doc:Main.End Device AT Commands and Downlink Command.WebHome]]

641

642

643

=== 3.5.2 Downlink Response(Since firmware v1.4) ===

644

645

646

Response feature is added to the server's downlink, a special package with a FPort of 200 will be uploaded immediately after receiving the data sent by the server.

647

648

649

(% aria-label="image-20220602163333-5.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:image-20220602163333-5.png||data-widget="image" height="263" width="1160"]]

650

651

(% title="Click and drag to resize" %)

652

653

The first byte of this package represents whether the configuration is successful, 00 represents failure, 01 represents success. Except for the first byte, the other is the previous downlink. (All commands except A8 type commands are applicable)

654

655

656

=== 3.5.3 Sensor related commands ===

==== (% style="color:blue" %)**RS485 Debug Command**(%%) ====

(((

This command is used to configure the RS485 devices; they won't be used during sampling. Max Length of AT+CFGDEV is **40 bytes**.

)))

(((

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

669

670

(((

671

(% style="color:#4472c4" %)** AT+CFGDEV=xx xx xx xx xx xx xx xx xx xx xx xx,m** (%%) m: 0: no CRC, 1: add CRC-16/MODBUS in the end of this command

)))

)))

(((

)))

* (((

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

)))

(((

Format: (% style="color:#4472c4" %)** A8 MM NN XX XX XX XX YY**

)))

(((

Where:

)))

* (((

MM: 1: add CRC-16/MODBUS ; 0: no CRC

693

)))

694

* (((

695

NN: The length of RS485 command

696

)))

697

* (((

698

XX XX XX XX: RS485 command total NN bytes

)))

* (((

(((

YY: How many bytes will be uplink from the return of this RS485 command,

)))

* (((

if YY=0, RS485-LN will execute the downlink command without uplink;

707

)))

708

* (((

709

if YY>0, RS485-LN will uplink total YY bytes from the output of this RS485 command; Fport=200

710

)))

711

* (((

712

if YY=FF, RS485-LN will uplink RS485 output with the downlink command content; Fport=200.

)))

)))

(((

(% style="color:blue" %)**Example 1:** (%%) ~-~-> Configure without ask for uplink (YY=0)

)))

(((

To connect a Modbus Alarm with below commands.

)))

* (((

The command to active alarm is: 0A 05 00 04 00 01 4C B0. Where 0A 05 00 04 00 01 is the Modbus command to read the register 00 40 where stored the DI status. The 4C B0 is the CRC-16/MODBUS which calculate manually.

)))

* (((

The command to deactivate alarm is: 0A 05 00 04 00 00 8D 70. Where 0A 05 00 04 00 00 is the Modbus command to read the register 00 40 where stored the DI status. The 8D 70 is the CRC-16/MODBUS which calculate manually.

)))

(((

So if user want to use downlink command to control to RS485 Alarm, he can use:

)))

(((

(% style="color:#4f81bd" %)**A8 01 06 0A 05 00 04 00 01 00**(%%): to activate the RS485 Alarm

)))

(((

(% style="color:#4f81bd" %)**A8 01 06 0A 05 00 04 00 00 00**(%%): to deactivate the RS485 Alarm

)))

(((

A8 is type code and 01 means add CRC-16/MODBUS at the end, the 3^^rd^^ byte is 06, means the next 6 bytes are the command to be sent to the RS485 network, the final byte 00 means this command don’t need to acquire output.

)))

(((

)))

(((

(% style="color:blue" %)**Example 2:** (%%)

)))

(((

Check TTL Sensor return:

)))

(((

(((

[[image:http://8.211.40.43/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/test/WebHome/1654132684752-193.png?rev=1.1||alt="1654132684752-193.png"]](% title="Click and drag to resize" %)

)))

)))

==== (% style="color:blue" %)**Set Payload version**(%%) ====

(((

This is the first byte of the uplink payload. RS485-LN can connect to different sensors. User can set the PAYVER field to tell server how to decode the current payload.

)))

(((

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

781

782

(% style="color:#4472c4" %)** AT+PAYVER: ** (%%) Set PAYVER field = 1

)))

* (((

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

)))

(((

(% style="color:#4472c4" %)** 0xAE 01** (%%) ~-~-> Set PAYVER field = 0x01

)))

(((

(% style="color:#4472c4" %)** 0xAE 0F** (%%) ~-~-> Set PAYVER field = 0x0F

)))

**1 ) Add the interrupt flag at the highest bit of the Payver byte, that is, Byte7 of the first byte. (Since v1.4.0)**

801

802

803

[[image:image-20220824145428-2.png||height="168" width="1300"]]

**2 ) if the data intercepted by AT+DATACUT or AT+MBFUN is empty, it will display NULL, and the payload will be filled with n FFs.**

808

809

810

[[image:image-20220824145428-3.png||height="308" width="1200"]]

==== (% style="color:blue" %)**Set RS485 Sampling Commands**(%%) ====

(((

AT+COMMANDx or AT+DATACUTx

)))

(((

These three commands are used to configure how the RS485-LN polling data from Modbus device. Detail of usage please see : [[polling RS485 device>>||anchor="H3.3.3Configurereadcommandsforeachsampling"]].

)))

(((

)))

* (((

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

831

)))

832

833

(% style="color:#4472c4" %)** AT+COMMANDx: ** (%%) Configure RS485 read command to sensor.

834

835

(% style="color:#4472c4" %)** AT+DATACUTx: **(%%) Configure how to handle return from RS485 devices.

* (((

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

)))

(((

(% style="color:#4472c4" %)** 0xAF**(%%) downlink command can be used to set AT+COMMANDx or AT+DATACUTx.

)))

(((

(% style="color:red" %)**Note : if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.**

)))

(((

Format: (% style="color:#4472c4" %)** AF MM NN LL XX XX XX XX YY**

)))

(((

Where:

)))

* (((

MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,

864

)))

865

* (((

866

NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.

867

)))

868

* (((

869

LL: The length of AT+COMMAND or AT+DATACUT command

870

)))

871

* (((

872

XX XX XX XX: AT+COMMAND or AT+DATACUT command

873

)))

874

* (((

875

YY: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN will execute an uplink after got this command.

)))

(((

**Example:**

)))

(((

(% style="color:#037691" %)**AF 03 01 06 0A 05 00 04 00 01 00**(%%): Same as AT+COMMAND3=0A 05 00 04 00 01,1

)))

(((

(% style="color:#037691" %)**AF 03 02 06**(% style="color:orange" %)** 10 **(% style="color:red" %)**01 **(% style="color:green" %)**05 06 09 0A**(% style="color:#037691" %)** 00**(%%): Same as AT+DATACUT3=(% style="color:orange" %)**16**(%%),(% style="color:red" %)**1**(%%),(% style="color:green" %)**5+6+9+10**

)))

(((

(% style="color:#037691" %)**AF 03 02 06 **(% style="color:orange" %)**0B**(% style="color:red" %)** 02 **(% style="color:green" %)**05 07 08 0A **(% style="color:#037691" %)**00**(%%): Same as AT+DATACUT3=(% style="color:orange" %)**11**(%%),(% style="color:red" %)**2**(%%),(% style="color:green" %)**5~~7+8~~10**

)))

==== (% style="color:blue" %)**Fast command to handle MODBUS device**(%%) ====

(((

(% style="color:#4472c4" %)** AT+MBFUN**(%%) is valid since v1.3 firmware version. The command is for fast configure to read Modbus devices. It is only valid for the devices which follow the [[MODBUS-RTU protocol>>url:https://www.modbustools.com/modbus.html]].

)))

(((

This command is valid since v1.3 firmware version

)))

(((

AT+MBFUN can auto read the Modbus function code: 01, 02, 03 or 04. AT+MBFUN has lower priority vs AT+DATACUT command. If AT+DATACUT command is configured, AT+MBFUN will be ignore.

)))

(((

)))

(((

**Example:**

)))

* (((

AT+MBFUN=1 and AT+DATACUT1/AT+DATACUT2 are not configure (0,0,0). So RS485-LN.

923

)))

924

* (((

925

AT+COMMAND1= 01 03 00 10 00 08,1 ~-~-> read slave address 01 , function code 03, start address 00 01, quantity of registers 00 08.

926

)))

927

* (((

928

AT+COMMAND2= 01 02 00 40 00 10,1 ~-~-> read slave address 01 , function code 02, start address 00 40, quantity of inputs 00 10.

)))

(% aria-label="image-20220602165351-6.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:image-20220602165351-6.png||data-widget="image"]]

934

935

(% title="Click and drag to resize" %)

936

937

(% aria-label="image-20220602165351-7.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:image-20220602165351-7.png||data-widget="image"]](% title="Click and drag to resize" %)

938

939

* (((

940

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

941

)))

942

943

**~ (% style="color:#4472c4" %)A9 aa(%%)** ~-~-> Same as AT+MBFUN=aa

944

945

946

==== (% style="color:blue" %)**RS485 command timeout**(%%) ====

(((

Some Modbus device has slow action to send replies. This command is used to configure the RS485-LN to use longer time to wait for their action.

)))

(((

Default value: 0, range: 0 ~~ 65 seconds

)))

(((

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

959

960

(% style="color:#4472c4" %)** AT+CMDDLaa=hex(bb cc)*1000**

)))

(((

**Example:**

)))

(((

(% style="color:#4472c4" %)** AT+CMDDL1=1000** (%%)to send the open time to 1000ms

)))

(((

)))

* (((

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

)))

(((

(% style="color:#4472c4" %)** 0x AA aa bb cc**(%%) Same as: AT+CMDDLaa=hex (bb cc)

)))

(((

**Example:**

)))

(((

**0xAA 01 03 E8** ~-~-> Same as **AT+CMDDL1=1000 ms**

)))

==== (% style="color:blue" %)**Uplink payload mode**(%%) ====

(((

Define to use one uplink or multiple uplinks for the sampling.

)))

(((

The use of this command please see: [[Compose Uplink payload>>||anchor="H3.3.4Composetheuplinkpayload"]]

)))

(((

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

1012

1013

(% style="color:#4472c4" %)** AT+DATAUP=0**

1014

1015

(% style="color:#4472c4" %)** AT+DATAUP=1**

)))

(% style="color:#4472c4" %)** 0xAD 01 00 00 14** (%%) **~-~->** Same as AT+DATAUP=1，20000 ~/~/ (00 00 14 is 20 seconds)

1021

1022

Each uplink is sent to the server at 20-second intervals when segmented.

* (((

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

1027

)))

1028

1029

(% style="color:#4472c4" %)** 0xAD 00** (%%) **~-~->** Same as AT+DATAUP=0

1030

1031

(% style="color:#4472c4" %)** 0xAD 01** (%%) **~-~->** Same as AT+DATAUP=1 ~/~/Each uplink is sent to the server one after the other as it is segmented.

1032

1033

1034

(Since firmware v1.4.0)

1035

1036

* (((

1037

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

1038

)))

1039

1040

(% style="color:#4472c4" %)** AT+DATAUP=1,Timeout**

* (((

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

1045

)))

1046

1047

(% style="color:#4472c4" %)** 0xAD 01 00 00 14** (%%) **~-~->** Same as AT+DATAUP=1，20000 ~/~/ (00 00 14 is 20 seconds)

1048

1049

Each uplink is sent to the server at 20-second intervals when segmented.

1050

1051

1052

==== (% style="color:blue" %)**Cut data separation processing(Since Version 1.4.2)**(%%) ====

1053

1054

1055

AT+NEWLINE command, which only takes effect when AT+DATAUP=1 or AT+DATAUP=1, timeout.

1056

1057

When not set, each part of AT+DATAUP is sent according to the maximum number of bytes of DR.

1058

1059

When setting, each part of AT+DATAUP is sent according to the value set by AT+NEWLINE.

* (((

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

1064

)))

1065

1066

(% style="color:#4472c4" %)//**AT+NEWLINE=ALL**//(%%)// //The data cut out by each AT+COMMANDx command is sent separately as an uplink.

1067

1068

(% style="color:#4472c4" %)//**AT+NEWLINE=ALL**//(%%)// equal： (% style="color:#4472c4" %)**AT+NEWLINE=1+2+3+4+5+6+7+8+9+10+11+12+13+14+15**//

1069

1070

1071

(% style="color:#4472c4" %)//**AT+NEWLINE=a+b+c**//(%%)// //The data returned by all commands is divided into three parts, COMMAND(1~~a) is the first part, COMMAND(a+1~~b) is the second part,COMMAND(b+1~~c) is the third part.

1072

1073

1074

(% style="color:#4472c4" %)//**AT+NEWLINE=NULL**//(%%)// //Turn off the functionality of this AT command.

* (((

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

1079

)))

1080

1081

//AT+NEWLINE=ALL ~-~--> (% style="color:#4472c4" %)**0xAC 01**//

1082

1083

// AT+NEWLINE= NULL ~-~--> (% style="color:#4472c4" %)**0xAC 00**//

1084

1085

//AT+NEWLINE= a+b+c ~-~--> (% style="color:#4472c4" %)**0xAC number of bytes a b c**//

1086

1087

//AT+NEWLINE= 1+5+15 ~-~--> (% style="color:#4472c4" %)**0xAC 03 01 05 0F**//

1088

1089

1090

==== (% style="color:blue" %)**Manually trigger an Uplink**(%%) ====

(((

Ask device to send an uplink immediately.

)))

* (((

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

)))

(((

No AT Command for this, user can press the [[ACT button>>||anchor="H3.7Buttons"]] for 1 second for the same.

)))

(((

)))

* (((

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

)))

(((

(% style="color:#4472c4" %)** 0x08 FF**(%%), RS485-LN will immediately send an uplink.

)))

==== (% style="color:blue" %)**Clear RS485 Command**(%%) ====

(((

The AT+COMMANDx and AT+DATACUTx settings are stored in special location, user can use below command to clear them.

)))

* (((

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

)))

(((

(% style="color:#4472c4" %)** AT+CMDEAR=mm,nn** (%%) mm: start position of erase ,nn: stop position of erase

)))

(((

Etc. AT+CMDEAR=1,10 means erase AT+COMMAND1/AT+DATACUT1 to AT+COMMAND10/AT+DATACUT10

)))

(((

Example screen shot after clear all RS485 commands.

)))

(((

)))

(((

The uplink screen shot is:

1152

)))

1153

1154

(% aria-label="1654160691922-496.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:1654160691922-496.png||data-widget="image"]](% style="background-image:url(http://wiki.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" %)

* (((

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

)))

(((

(% style="color:#4472c4" %)** 0x09 aa bb** (%%) same as AT+CMDEAR=aa,bb

)))

==== (% style="color:blue" %)**Set Serial Communication Parameters**(%%) ====

(((

Set the Rs485 serial communication parameters:

)))

(((

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

)))

(((

* Set Baud Rate

)))

(% style="color:#4472c4" %)** AT+BAUDR=9600** (%%) ~/~/ Options: (200~~115200) When using low baud rate or receiving multiple bytes, you need to use AT+CMDDL to increase the receive timeout (the default receive timeout is 400ms), otherwise data will be lost

(((

* Set UART Parity

)))

(% style="color:#4472c4" %)** AT+PARITY=0** (%%) ~/~/ Option: 0: no parity, 1: odd parity, 2: even parity

(((

* Set STOPBIT

)))

(% style="color:#4472c4" %)** AT+STOPBIT=0** (%%) ~/~/ Option: 0 for 1bit; 1 for 1.5 bit ; 2 for 2 bits

(((

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

)))

(((

(% style="color:#4472c4" %)** A7 01 aa bb**: (%%) Same AT+BAUDR=hex(aa bb)*100

)))

(((

**Example:**

)))

* (((

A7 01 00 60 same as AT+BAUDR=9600

1213

)))

1214

* (((

1215

A7 01 04 80 same as AT+BAUDR=115200

)))

(((

* A7 02 aa: Same as AT+PARITY=aa (aa value: 00 , 01 or 02)

)))

(((

* A7 03 aa: Same as AT+STOPBIT=aa (aa value: 00 , 01 or 02)

)))

==== (% style="color:blue" %)**Configure Databit (Since Version 1.4.0)**(%%) ====

* (((

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

1234

)))

1235

1236

(% style="color:#4472c4" %)** AT+DATABIT=7 **(%%)~/~/ Set the data bits to 7

1237

1238

(% style="color:#4472c4" %)** AT+DATABIT=8 **(%%)~/~/ Set the data bits to 8

1239

1240

* (((

1241

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

1242

)))

1243

1244

(% style="color:#4472c4" %)** A7 04 07**(%%): Same as AT+DATABIT=7

1245

1246

(% style="color:#4472c4" %)** A7 04 08**(%%): Same as AT+DATABIT=8

==== (% style="color:blue" %)**Encrypted payload(Since Version 1.4.0)**(%%) ====

(((

)))

* (((

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

1258

)))

1259

1260

(% style="color:#4472c4" %)** AT+DECRYPT=1 ** (%%) ~/~/ The payload is uploaded without encryption

1261

1262

(% style="color:#4472c4" %)** AT+DECRYPT=0 ** (%%) ~/~/ Encrypt when uploading payload (default)

==== (% style="color:blue" %)**Get sensor value(Since Version 1.4.0)**(%%) ====

* (((

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

1271

)))

1272

1273

(% style="color:#4472c4" %)** AT+GETSENSORVALUE=0 **(%%) ~/~/ The serial port gets the reading of the current sensor

1274

1275

(% style="color:#4472c4" %)** AT+GETSENSORVALUE=1 **(%%) ~/~/ The serial port gets the current sensor reading and uploads it.

==== (% style="color:blue" %)**Resets the downlink packet count(Since Version 1.4.0)**(%%) ====

* (((

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

1284

)))

1285

1286

(% style="color:#4472c4" %)** AT+DISFCNTCHECK=0 **(%%) ~/~/ When the downlink packet count sent by the server is less than the node downlink packet count or exceeds 16384, the node will no longer receive downlink packets (default)

1287

1288

(% style="color:#4472c4" %)** AT+DISFCNTCHECK=1 **(%%) ~/~/ When the downlink packet count sent by the server is less than the node downlink packet count or exceeds 16384, the node resets the downlink packet count and keeps it consistent with the server downlink packet count.

==== (% style="color:blue" %)**When the limit bytes are exceeded, upload in batches(Since Version 1.4.0)**(%%) ====

* (((

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

1297

)))

1298

1299

(% style="color:#4472c4" %)** AT+DISMACANS=0** (%%) ~/~/ When the MACANS of the reply server plus the payload exceeds the maximum number of bytes of 11 bytes (DR0 of US915, DR2 of AS923, DR2 of AU195), the node will send a packet with a payload of 00 and a port of 4. (default)

1300

1301

(% style="color:#4472c4" %)** AT+DISMACANS=1** (%%) ~/~/ When the MACANS of the reply server plus the payload exceeds the maximum number of bytes of the DR, the node will ignore the MACANS and not reply, and only upload the payload part.

* (((

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

1306

)))

1307

1308

(% style="color:#4472c4" %)** 0x21 00 01 ** (%%) ~/~/ Set the DISMACANS=1

==== (% style="color:blue" %)**Copy downlink to uplink (Since Version 1.4.0)**(%%) ====

* (((

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

1317

)))

1318

1319

(% style="color:#4472c4" %)** AT+RPL=5** (%%) ~/~/ After receiving the package from the server, it will immediately upload the content of the package to the server, the port number is 100.

1320

1321

Example：**aa xx xx xx xx** ~/~/ aa indicates whether the configuration has changed, 00 is yes, 01 is no; xx xx xx xx are the bytes sent.

1322

1323

1324

[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LSN50%20%26%20LSN50-V2%20-%20LoRaWAN%20Sensor%20Node%20User%20Manual/WebHome/image-20220823173747-6.png?width=1124&height=165&rev=1.1||alt="image-20220823173747-6.png"]]

1325

1326

For example, sending 11 22 33 44 55 66 77 will return invalid configuration 00 11 22 33 44 55 66 77.

[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LSN50%20%26%20LSN50-V2%20-%20LoRaWAN%20Sensor%20Node%20User%20Manual/WebHome/image-20220823173833-7.png?width=1124&height=149&rev=1.1||alt="image-20220823173833-7.png"]]

1331

1332

For example, if 01 00 02 58 is issued, a valid configuration of 01 01 00 02 58 will be returned.

==== (% style="color:blue" %)**Query version number and frequency band 、TDC(Since Version 1.4.0)**(%%) ====

(((

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

1341

1342

(% style="color:#4472c4" %)** 26 01 ** (%%) ~/~/ Downlink 26 01 can query device upload frequency, frequency band, software version number, TDC time.

)))

Example：

[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LSN50%20%26%20LSN50-V2%20-%20LoRaWAN%20Sensor%20Node%20User%20Manual/WebHome/image-20220823173929-8.png?width=1205&height=76&rev=1.1||alt="image-20220823173929-8.png"]]

==== (% style="color:blue" %)** Monitor RS485 communication of other devices(Since Version 1.4.0)**(%%) ====

* (((

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

1358

)))

1359

1360

(% style="color:#4472c4" %)**AT+RXMODE=1,10** (%%) ~/~/ When the RS485-LN receives more than 10 bytes from the RS485, it immediately sends the uplink of the received data.

1361

1362

(% style="color:#4472c4" %)**AT+RXMODE=2,500 ** (%%) ~/~/ RS485-LN uploads data as uplink from the first byte received by RS485 to the data received within 500ms after that.

1363

1364

(% style="color:#4472c4" %)**AT+RXMODE=0,0 ** (%%) ~/~/ Disable this mode (default)

* (((

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

1369

)))

1370

1371

(% style="color:#4472c4" %)** A6 aa bb bb ** (%%) ~/~/ same as AT+RXMODE=aa,bb

1372

1373

[[image:image-20220824144240-1.png]]

1374

1375

1376

== 3.6 Listening mode for RS485 network ==

(((

This feature support since firmware v1.4

)))

(((

RS485-LN supports listening mode, it can listen the RS485 network packets and send them via LoRaWAN uplink. Below is the structure. The blue arrow shows the RS485 network packets to RS485-LN.

)))

(% aria-label="image-20220602171200-8.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:image-20220602171200-8.png||data-widget="image" height="567" width="1007"]](% style="background-image:url(http://wiki.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"]]

1390

1391

(% title="Click and drag to resize" %)

1392

1393

(((

1394

To enable the listening mode, use can run the command (% style="color:#4472c4" %)** AT+RXMODE**.

1395

)))

1396

1397

(% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)

1398

|=(% style="width: 156px; background-color:#4F81BD;color:white" %)(((

1399

**Command example**

1400

)))|=(% style="width: 355px; background-color:#4F81BD;color:white" %)(((

1401

**Function**

1402

)))

1403

|(% style="width:156px" %)(((

1404

AT+RXMODE=1,10

1405

)))|(% style="width:352px" %)(((

1406

Enable listening mode 1, if RS485-LN has received more than 10 RS485 commands from the network. RS485-LN will send these commands via LoRaWAN uplinks.

1407

)))

1408

|(% style="width:156px" %)(((

1409

AT+RXMODE=2,500

1410

)))|(% style="width:352px" %)(((

1411

Enable listening mode 2, RS485-LN will capture and send a 500ms content once from the first detect of character. Max value is 65535 ms

1412

)))

1413

|(% style="width:156px" %)(((

1414

AT+RXMODE=0,0

1415

)))|(% style="width:352px" %)(((

1416

Disable listening mode. This is the default settings.

1417

)))

1418

|(% style="width:156px" %)(((

1419

1420

)))|(% style="width:352px" %)(((

1421

A6 aa bb cc same as AT+RXMODE=aa,(bb<<8 | cc)

)))

(((

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

)))

(((

(% style="color:#4472c4" %)** 0xA6 aa bb cc **(%%) same as AT+RXMODE=aa,(bb<<8 | cc)

)))

(((

)))

(((

**Example**:

)))

(((

The RS485-LN is set to AT+RXMODE=2,1000

)))

(((

There is a two Modbus commands in the RS485 network as below:

)))

(((

The Modbus master send a command: (% style="background-color:#ffc000" %)**01 03 00 00 00 02 c4 0b**

)))

(((

And Modbus slave reply with: (% style="background-color:green" %)**01 03 04 00 00 00 00 fa 33**

)))

(((

RS485-LN will capture both and send the uplink: (% style="background-color:#ffc000" %)**01 03 00 00 00 02 c4 0b **(% style="background-color:green" %)**01 03 04 00 00 00 00 fa 33**

)))

(((

(% aria-label="image-20220602171200-9.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:image-20220602171200-9.png||data-widget="image"]](% style="background-image:url(http://wiki.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" %)

)))

(((

(% style="color:red" %)**Notice: Listening mode can work with the default polling mode of RS485-LN. When RS485-LN is in to send the RS485 commands (from AT+COMMANDx), the listening mode will be interrupt for a while.**

)))

== 3.7 Buttons ==

(% border="1.5" cellspacing="4" style="background-color:#f2f2f2; width:430px" %)

1479

|=(% style="width: 50px;background-color:#4F81BD;color:white" %)**Button**|=(% style="width: 380px;background-color:#4F81BD;color:white" %)**Feature**

1480

|(% style="width:50px" %)ACT|(% style="width:361px" %)If RS485 joined in network, press this button for more than 1 second, RS485 will upload a packet, and the SYS LED will give a (% style="color:blue" %)**Blue blink**

1481

|(% style="width:50px" %)RST|(% style="width:361px" %)Reboot RS485

1482

|(% style="width:50px" %)PRO|(% style="width:361px" %)Use for upload image, see [[How to Update Image>>||anchor="H6.1Howtoupgradetheimage3F"]]

== 3.8 LEDs ==

(% border="1.5" cellspacing="4" style="background-color:#f2f2f2; width:430px" %)

1488

|=(% style="width: 50px;background-color:#4F81BD;color:white" %)**LEDs**|=(% style="width: 380px;background-color:#4F81BD;color:white" %)**Feature**

1489

|PWR|Always on if there is power

1490

|SYS|After device is powered on, the SYS will (% style="color:green" %)**fast blink in GREEN**(%%) for 5 times, means RS485-LN start to join LoRaWAN network. If join success, SYS will be (% style="color:green" %)**on GREEN for 5 seconds** (%%)**. **SYS will (% style="color:green" %)**blink Blue**(%%) on every upload and (% style="color:green" %)**blink Green**(%%) once receive a downlink message.

= 4. Case Study =

User can check this URL for some case studies: [[APP RS485 COMMUNICATE WITH SENSORS>>doc:Main.Application Note \: Communicate with Different Sensors ----- RS485-LN RS485-BL.WebHome]]

1496

1497

1498

= 5. Use AT Command =

1499

1500

== 5.1 Access AT Command ==

(((

RS485-LN supports AT Command set. User can use a USB to TTL adapter plus the 3.5mm Program Cable to connect to RS485-LN to use AT command, as below.

)))

(% aria-label="1654162355560-817.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:1654162355560-817.png||data-widget="image"]](% style="background-image:url(http://wiki.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" %)

(((

In PC, User needs to set (% style="color:blue" %)**serial tool**(%%)(such as [[putty>>url:https://www.chiark.greenend.org.uk/~~sgtatham/putty/latest.html]], SecureCRT) baud rate to (% style="color:green" %)**9600**(%%) to access to access serial console of RS485-LN. The default password is 123456. Below is the output for reference:

)))

(% aria-label="1654162368066-342.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:1654162368066-342.png||data-widget="image"]](% style="background-image:url(http://wiki.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" %)

(((

More detail AT Command manual can be found at [[AT Command Manual>>https://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]

)))

== 5.2 Common AT Command Sequence ==

1528

1529

=== 5.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===

1530

1531

1532

If device has not joined network yet:

1533

1534

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

1535

* (% style="color:#037691" %)**AT+NJM=0**

1536

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

(((

If device already joined network:

1542

1543

* (% style="color:#037691" %)**AT+NJM=0**

1544

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

)))

=== 5.5.2 Single-channel ABP mode (Use with LG01/LG02) ===

1550

1551

1552

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

1553

1554

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

1555

1556

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

1557

1558

(% style="background-color:#dcdcdc" %)**AT+DR=5** (%%) Set Data Rate

1559

1560

(% style="background-color:#dcdcdc" %)**AT+TDC=60000** (%%) Set transmit interval to 60 seconds

1561

1562

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

1563

1564

(% style="background-color:#dcdcdc" %)**AT+RX2FQ=868400000** (%%) Set RX2Frequency to 868.4Mhz (according to the result from server)

1565

1566

(% style="background-color:#dcdcdc" %)**AT+RX2DR=5** (%%) Set RX2DR to match the downlink DR from server. see below

1567

1568

(% style="background-color:#dcdcdc" %)**AT+DADDR=26** (%%) 01 1A F1 Set Device Address to 26 01 1A F1, this ID can be found in the LoRa Server portal.

1569

1570

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

1571

1572

1573

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

1574

1575

(((

1576

(% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.

1577

2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.

1578

3. Make sure SF / bandwidth setting in LG01/LG02 match the settings of AT+DR. refer [[this link>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_Gateway/&file=LoRaWAN%201.0.3%20Regional%20Parameters.xlsx]] to see what DR means.

1579

4. The command AT+RX2FQ and AT+RX2DR is to let downlink work. to set the correct parameters, user can check the actually downlink parameters to be used. As below. Which shows the RX2FQ should use 868400000 and RX2DR should be 5

)))

(% aria-label="1654162478620-421.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:1654162478620-421.png||data-widget="image"]](% style="background-image:url(http://wiki.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" %)

= 6. FAQ =

== 6.1 How to upgrade the image? ==

(((

The RS485-LN LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to RS485-LN to:

)))

* (((

Support new features

)))

* (((

For bug fix

)))

* (((

Change LoRaWAN bands.

)))

(((

Below shows the hardware connection for how to upload an image to RS485-LN:

1608

)))

1609

1610

(% aria-label="1654162535040-878.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:1654162535040-878.png||data-widget="image"]](% style="background-image:url(http://wiki.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"]]

1611

1612

(% title="Click and drag to resize" %)

1613

1614

(((

1615

(% 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]].

)))

(((

(% style="color:blue" %)**Step2**(%%)**:** Download the [[LT Image files>>url:https://www.dropbox.com/sh/g99v0fxcltn9r1y/AACP33wo_ZQLsxW2MJ70oUoba/RS485-LN/Firmware?dl=0&subfolder_nav_tracking=1]].

)))

(((

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

)))

(((

(((

(((

(% style="color:blue" %) Hold down the PRO button and then momentarily press the RST reset button and the SYS led will change from OFF to ON, While SYS LED is RED ON, it means the RS485-LN is ready to be program.

)))

)))

)))

(% aria-label="image-20220602175818-12.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:image-20220602175818-12.png||data-widget="image"]](% style="background-image:url(http://wiki.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" %)

1642

1643

1644

(% aria-label="image-20220602175848-13.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:image-20220602175848-13.png||data-widget="image"]](% style="background-image:url(http://wiki.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" %)

1645

1646

1647

(% aria-label="image-20220602175912-14.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:image-20220602175912-14.png||data-widget="image"]](% style="background-image:url(http://wiki.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" %)

(% style="color:red" %)**Users can select the new burning software STM32Cubeprogramer for firmware upgrade and follow the same connection steps to enter burning mode (until SYS LED is RED ON):**

1652

1653

[[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/Firmware%20Upgrade%20Instruction%20for%20STM32%20base%20products/#H4.2.FirmwareupgradeusingSTM32Cubeprogramer>>url:http://wiki.dragino.com/xwiki/bin/view/Main/Firmware%20Upgrade%20Instruction%20for%20STM32%20base%20products/#H4.2.FirmwareupgradeusingSTM32Cubeprogramer]]

1654

1655

1656

(% style="color:red" %)**Notice**: **In case user has lost the program cable. User can hand made one from a 3.5mm cable. The pin mapping is:**

1657

1658

(% aria-label="image-20220602175638-10.png image widget" contenteditable="false" role="region" tabindex="-1" %)[[image:image-20220602175638-10.png||data-widget="image"]](% style="background-image:url(http://wiki.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" %)

1659

1660

1661

== 6.2 How to change the LoRa Frequency Bands/Region? ==

1662

1663

1664

User can follow the introduction for [[how to upgrade image>>||anchor="H6.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.

1665

1666

1667

== 6.3 How many RS485-Slave can RS485-LN connects? ==

1668

1669

1670

The RS485-LN can support max 32 RS485 devices. Each uplink command of RS485-LN can support max 16 different RS485 command. So RS485-LN can support max 16 RS485 devices pre-program in the device for uplink. For other devices no pre-program, user can use the [[downlink message (type code 0xA8) to poll their info>>||anchor="H3.3.3Configurereadcommandsforeachsampling"]].

1671

1672

1673

== 6.4 Compatible question to ChirpStack and TTI LoRaWAN server ? ==

1674

1675

1676

When user need to use with ChirpStack or TTI. Please set AT+RPL=4.

1677

1678

Detail info check this link: [[Set Packet Receiving Response Level>>doc:Main.End Device AT Commands and Downlink Command.WebHome||anchor="H7.23SetPacketReceivingResponseLevel"]]

1679

1680

1681

== 6.5 Can i use point to point communication for RS485-LN? ==

1682

1683

1684

Yes, please updating point-to-point [[firmware>>https://www.dropbox.com/sh/g99v0fxcltn9r1y/AACP33wo_ZQLsxW2MJ70oUoba/RS485-LN/Firmware?dl=0&subfolder_nav_tracking=1]]，then refer [[Point to Point Communication for RS485-LN>>Point to Point Communication for RS485-LN]].

1685

1686

1687

== 6.6 How to Use RS485-LN to connect to RS232 devices? ==

1688

1689

1690

[[Use RS485-BL or RS485-LN to connect to RS232 devices. - DRAGINO>>url:http://8.211.40.43:8080/xwiki/bin/view/Main/RS485%20to%20RS232/]]

1691

1692

1693

== 6.7 How to judge whether there is a problem with the set COMMAND ==

1694

1695

=== 6.7.1 Introduce: ===

1696

1697

1698

Users can use below the structure to fast debug the communication between RS485BL and RS485-LN. The principle is to put the PC in the RS485 network and sniff the packet between Modbus MTU and RS485-BL/LN. We can use this way to:

1699

1700

1. Test if Modbus-MTU works with PC commands.

1701

1. Check if RS485-LN sent the expected command to Mobus-MTU

1702

1. Check if Modbus-MTU return back the expected result to RS485-LN.

1703

1. If both b) and c) has issue, we can compare PC’s output and RS485-LN output.

1704

1705

[[image:image-20240816112950-1.png||height="382" width="731"]]

Example Connection:

[[image:image-20221130104310-2.png]]

1711

1712

1713

=== 6.7.2 Set up PC to monitor RS485 network With Serial tool ===

1714

1715

1716

(% style="color:red" %)**Note: Receive and send set to hex mode**

1717

1718

[[image:image-20221130104310-3.png||height="616" width="714"]]

1719

1720

1721

=== 6.7.3 With ModRSsim2: ===

1722

1723

1724

(% style="color:blue" %)**(1) Select serial port MODBUS RS-232**

1725

1726

[[image:image-20221130104310-4.png||height="390" width="865"]]

1727

1728

1729

(% style="color:blue" %)**(2) Click the serial port icon**

1730

1731

[[image:image-20221130104310-5.png||height="392" width="870"]]

1732

1733

1734

(% style="color:blue" %)**(3) After selecting the correct serial port and baud rate, click ok**

1735

1736

[[image:image-20221130104310-6.png]]

1737

1738

1739

(% style="color:blue" %)**(4) Click the comms.**

1740

1741

[[image:image-20221130104310-7.png||height="376" width="835"]]

1742

1743

(% class="wikigeneratedid" id="HRunRS485-LN2FBLcommandandmonitorifitiscorrect." %)

1744

**Run RS485-LN/BL command and monitor if it is correct.**

1745

1746

1747

=== 6.7.4 Example – Test the CFGDEV command ===

1748

1749

1750

RS485-LN sent below command:

1751

1752

(% style="color:blue" %)**AT+CFGDEV=01 03 00 20 00 01,1**(%%) to RS485 network, and PC is able to get this command and return commands from MTU to show in the serial tool.

1753

1754

1755

We can see the output from the Serial port tool to analyze. And check if they are expected result.

1756

1757

[[image:image-20221130104310-8.png||height="214" width="797"]]

1758

1759

1760

We can also use (% style="color:blue" %)**ModRSsim2**(%%) to see the output.

1761

1762

[[image:image-20221130104310-9.png||height="531" width="729"]]

1763

1764

1765

=== 6.7.5 Example – Test CMD command sets. ===

1766

1767

1768

Run (% style="color:blue" %)**AT+SENSORVALUE=1**(%%) to test the CMD commands set in RS485-LN.

1769

1770

1771

(% style="color:blue" %)**Serial port tool:**

1772

1773

[[image:image-20221130104310-10.png||height="339" width="844"]]

1774

1775

1776

(% style="color:blue" %)**ModRSsim2:**

1777

1778

[[image:image-20221130104310-11.png||height="281" width="962"]]

1779

1780

1781

=== 6.7.6 Test with PC ===

1782

1783

1784

If there is still have problem to set up correctly the commands between RS485-LN and MTU. User can test the correct RS485 command set in PC and compare with the RS485 command sent out via RS485-LN. as long as both commands are the same, the MTU should return correct result.

1785

1786

1787

Or User can send the working commands set in PC serial tool to Dragino Support to check what should be configured in RS485-LN.

1788

1789

(% style="color:blue" %)**Connection method：**

1790

1791

[[image:image-20221130104310-12.png]]

1792

1793

1794

(% style="color:blue" %)**Link situation:**

1795

1796

[[image:image-20221130104310-13.png||height="458" width="486"]]

1797

1798

1799

[[image:image-20221130104310-14.png||height="371" width="823"]]

1800

1801

1802

== 6.8 Where to get the decoder for RS485-LN? ==

1803

1804

1805

The decoder for RS485-LN needs to be written by yourself. Because the sensor to which the user is connected is custom, the read device data bytes also need custom parsing, so there is no universal decoder. We can only provide [[templates>>https://github.com/dragino/dragino-end-node-decoder/tree/main/RS485-LN]] for decoders (no intermediate data parsing part involved)

1806

1807

1808

== 6.9 How to configure RS485 commands more conveniently？ ==

1809

1810

1811

Dragino has developed an application for the RS485 series of products.

1812

1813

It can help you configure RS485 sensors more conveniently

1814

Please refer to the link below for specific usage：

1815

1816

[[RS485 Configure Tool - DRAGINO>>url:http://wiki.dragino.com/xwiki/bin/view/Main/RS485_Configure_Tool/#HTableofContentsFF1A]]

1817

1818

1819

= 7. Trouble Shooting =

1820

1821

== 7.1 Downlink doesn't work, how to solve it? ==

1822

1823

1824

Please see this link for debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome]]

1825

1826

1827

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

1828

1829

1830

It might about the channels mapping. Please see for detail: [[Notice of Frequency band>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]

1831

1832

1833

== 7.3 Why can't customers see the device's data in the server when the data is too long? ==

1834

1835

This is due to the limitation of the lorawan protocol, and the fixed DR needs to be adjusted to improve this problem.

1836

1837

Please refer to the following link for the number of bytes limited by different frequencies and different DRs in the lorawan protocol

1838

1839

[[lora-alliance.org/wp-content/uploads/2021/05/RP002-1.0.3-FINAL-1.pdf>>url:https://lora-alliance.org/wp-content/uploads/2021/05/RP002-1.0.3-FINAL-1.pdf]]

Example:

[[image:image-20240620145456-1.png]]

1844

1845

Please refer to the following command to fix DR

AT+ADR=0

AT+DR=3

Downlink command:

[[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20AT%20Commands%20and%20Downlink%20Command/#H7.4DataRate>>http://wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20AT%20Commands%20and%20Downlink%20Command/#H7.4DataRate]]

= 8. Order Info =

(% style="color:blue" %)**Part Number: RS485-LN-XXX**

1861

1862

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

1863

1864

* (% style="color:red" %)**EU433**(%%): frequency bands EU433

1865

* (% style="color:red" %)**EU868**(%%): frequency bands EU868

1866

* (% style="color:red" %)**KR920**(%%): frequency bands KR920

1867

* (% style="color:red" %)**CN470**(%%): frequency bands CN470

1868

* (% style="color:red" %)**AS923**(%%): frequency bands AS923

1869

* (% style="color:red" %)**AU915**(%%): frequency bands AU915

1870

* (% style="color:red" %)**US915**(%%): frequency bands US915

1871

* (% style="color:red" %)**IN865**(%%): frequency bands IN865

1872

* (% style="color:red" %)**RU864**(%%): frequency bands RU864

1873

* (% style="color:red" %)**KZ865**(%%): frequency bands KZ865

= 9. Packing Info =

**Package Includes**:

1879

1880

* RS485-LN x 1

1881

* Stick Antenna for LoRa RF part x 1

1882

* Program cable x 1

1883

1884

**Dimension and weight**:

1885

1886

* Device Size: 13.5 x 7 x 3 cm

1887

* Device Weight: 105g

1888

* Package Size / pcs : 14.5 x 8 x 5 cm

1889

* Weight / pcs : 170g

1890

1891

= 10. FCC Caution for RS485LN-US915 =

(((

Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.

)))

(((

This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

)))

(((

)))

(((

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

)))

(((

(% style="color:red" %)**Note: **(%%)This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

)))

(((

—Reorient or relocate the receiving antenna.

)))

(((

—Increase the separation between the equipment and receiver.

)))

(((

—Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

)))

(((

—Consult the dealer or an experienced radio/TV technician for help.

)))

(((

)))

(((

(% style="color:red" %)**FCC Radiation Exposure Statement:**

)))

(((

This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment.This equipment should be installed and operated with minimum distance 20cm between the radiator& your body.

)))

= 11. 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.

1948

)))

1949

* (((

1950

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:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]].

)))

Wiki source code of RS485-LN – RS485 to LoRaWAN Converter User Manual

Applications

Navigation