SDI-12-LB -- SDI-12 to LoRaWAN Converter User Manual

The Dragino (% style="color:blue" %)**SDI-12-LB**(%%) is a (% style="color:blue" %)**SDI-12 to LoRaWAN Converter **(%%)designed for Smart Agriculture solution.

27

)))

28

29

(((

30

SDI-12 (Serial Digital Interface at 1200 baud) is an asynchronous [[serial communications>>url:https://en.wikipedia.org/wiki/Serial_communication]] protocol for intelligent sensors that monitor environment data. SDI-12 protocol is widely used in Agriculture sensor and Weather Station sensors.

)))

(((

SDI-12-LB has SDI-12 interface and support 12v output to power external SDI-12 sensor. It can get the environment data from SDI-12 sensor and sends out the data via LoRaWAN wireless protocol.

)))

(((

The LoRa wireless technology used in SDI-12-LB allows device 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.

)))

(((

SDI-12-LB is powered by (% style="color:blue" %)**8500mAh Li-SOCI2 battery**(%%), it is designed for long term use up to 5 years.

)))

(((

Each SDI-12-LB is pre-load with a set of unique keys for LoRaWAN registrations, register these keys to local LoRaWAN server and it will auto connect after power on.

)))

[[image:image-20230201084414-1.png||height="464" width="1108"]]

== 1.2 Features ==

* LoRaWAN 1.0.3 Class A

57

* Ultra-low power consumption

58

* Controllable 5v and 12v output to power external sensor

59

* SDI-12 Protocol to connect to SDI-12 Sensor

60

* Monitor Battery Level

61

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

62

* Support Bluetooth v5.1 and LoRaWAN remote configure.

63

* Support wireless OTA update firmware

64

* Uplink on periodically

65

* Downlink to change configure

66

* 8500mAh Battery for long term use

== 1.3 Specification ==

71

72

73

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

* MCU: 48Mhz ARM

* Flash: 256KB

* RAM: 64KB

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

80

81

* Supply Voltage: 2.5v ~~ 3.6v

82

* Operating Temperature: -40 ~~ 85°C

83

84

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

85

86

* Frequency Range, Band 1 (HF): 862 ~~ 1020 Mhz

87

* Max +22 dBm constant RF output vs.

88

* RX sensitivity: down to -139 dBm.

89

* Excellent blocking immunity

90

91

(% style="color:#037691" %)**Current Input Measuring :**

* Range: 0 ~~ 20mA

* Accuracy: 0.02mA

* Resolution: 0.001mA

96

97

(% style="color:#037691" %)**Voltage Input Measuring:**

* Range: 0 ~~ 30v

* Accuracy: 0.02v

* Resolution: 0.001v

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

104

105

* Li/SOCI2 un-chargeable battery

106

* Capacity: 8500mAh

107

* Self-Discharge: <1% / Year @ 25°C

108

* Max continuously current: 130mA

109

* Max boost current: 2A, 1 second

110

111

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

112

113

* Sleep Mode: 5uA @ 3.3v

114

* LoRa Transmit Mode: 125mA @ 20dBm, 82mA @ 14dBm

== 1.4 Connect to SDI-12 Sensor ==

[[image:1675212538524-889.png]]

123

124

125

== 1.5 Sleep mode and working mode ==

126

127

128

(% style="color:blue" %)**Deep Sleep Mode: **(%%)Sensor doesn't have any LoRaWAN activate. This mode is used for storage and shipping to save battery life.

129

130

(% style="color:blue" %)**Working Mode: **(%%)In this mode, Sensor will work as LoRaWAN Sensor to Join LoRaWAN network and send out sensor data to server. Between each sampling/tx/rx periodically, sensor will be in IDLE mode), in IDLE mode, sensor has the same power consumption as Deep Sleep mode.

131

132

133

== 1.6 Button & LEDs ==

134

135

136

[[image:1675212633011-651.png]]

137

138

139

(% border="1" cellspacing="4" style="background-color:#f7faff; color:black; width:510px" %)

140

|=(% style="width: 167px;" %)**Behavior on ACT**|=(% style="width: 109px;" %)**Function**|=(% style="width: 231px;" %)**Action**

141

|(% style="width:167px" %)Pressing ACT between 1s < time < 3s|(% style="width:109px" %)Send an uplink|(% style="width:231px" %)(((

142

If sensor is already Joined to LoRaWAN network, sensor will send an uplink packet, (% style="color:blue" %)**blue led** (%%)will blink once.

143

Meanwhile, BLE module will be active and user can connect via BLE to configure device.

144

)))

145

|(% style="width:167px" %)Pressing ACT for more than 3s|(% style="width:109px" %)Active Device|(% style="width:231px" %)(((

146

(% style="color:green" %)**Green led**(%%) will fast blink 5 times, device will enter (% style="color:#037691" %)**OTA mode**(%%) for 3 seconds. And then start to JOIN LoRaWAN network.

147

(% style="color:green" %)**Green led**(%%) will solidly turn on for 5 seconds after joined in network.

148

Once sensor is active, BLE module will be active and user can connect via BLE to configure device, no matter if device join or not join LoRaWAN network.

149

)))

150

|(% style="width:167px" %)Fast press ACT 5 times.|(% style="width:109px" %)Deactivate Device|(% style="width:231px" %)(% style="color:red" %)**Red led**(%%) will solid on for 5 seconds. Means PS-LB is in Deep Sleep Mode.

== 1.7 Pin Mapping ==

155

156

157

[[image:1675213198663-754.png]]

158

159

160

== 1.8 BLE connection ==

161

162

163

SDI-12-LB support BLE remote configure.

164

165

BLE can be used to configure the parameter of sensor or see the console output from sensor. BLE will be only activate on below case:

166

167

* Press button to send an uplink

168

* Press button to active device.

169

* Device Power on or reset.

170

171

If there is no activity connection on BLE in 60 seconds, sensor will shut down BLE module to enter low power mode.

== 1.9 Mechanical ==

[[image:image-20230201090139-2.png]]

178

179

[[image:image-20230201090139-3.png]]

180

181

[[image:image-20230201090139-4.png]]

182

183

184

= 2. Configure SDI-12 to connect to LoRaWAN network =

185

186

== 2.1 How it works ==

187

188

189

The SDI-12-LB is configured as (% style="color:#037691" %)**LoRaWAN OTAA Class A**(%%) mode by default. It has OTAA keys to join LoRaWAN network. To connect a local LoRaWAN network, you need to input the OTAA keys in the LoRaWAN IoT server and activate the SDI-12-LB. It will automatically join the network via OTAA and start to send the sensor value. The default uplink interval is 20 minutes.

190

191

192

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

193

194

195

Following is an example for how to join the [[TTN v3 LoRaWAN Network>>url:https://console.cloud.thethings.network/]]. Below is the network structure; we use the [[LPS8v2>>url:https://www.dragino.com/products/lora-lorawan-gateway/item/228-lps8v2.html]] as a LoRaWAN gateway in this example.

196

197

198

[[image:image-20230201090528-5.png||height="465" width="1111"]]

199

200

201

The LPS8V2 is already set to connected to [[TTN network >>url:https://console.cloud.thethings.network/]], so what we need to now is configure the TTN server.

202

203

204

(% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from SDI-12-LB.

205

206

Each SDI-12-LB is shipped with a sticker with the default device EUI as below:

207

208

209

[[image:image-20230201152430-20.jpeg]]

210

211

212

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

213

214

215

(% style="color:blue" %)**Register the device**

216

217

[[image:1675213652444-622.png]]

218

219

220

(% style="color:blue" %)**Add APP EUI and DEV EUI**

221

222

223

[[image:1675213661769-223.png]]

224

225

226

(% style="color:blue" %)**Add APP EUI in the application**

227

228

229

[[image:1675213675852-577.png]]

230

231

232

(% style="color:blue" %)**Add APP KEY**

233

234

[[image:1675213686734-883.png]]

235

236

237

(% style="color:blue" %)**Step 2**(%%): Activate on SDI-12-LB

238

239

240

Press the button for 5 seconds to activate the SDI-12-LB.

241

242

(% style="color:green" %)**Green led**(%%) will fast blink 5 times, device will enter (% style="color:blue" %)**OTA mode** (%%)for 3 seconds. And then start to JOIN LoRaWAN network. (% style="color:green" %)**Green led**(%%) will solidly turn on for 5 seconds after joined in network.

243

244

245

[[image:1675213704414-644.png]]

246

247

248

== 2.3 SDI-12 Related Commands ==

249

250

251

User need to configure SDI-12-LB to communicate with SDI-12 sensors otherwise the uplink payload will only include a few bytes.

252

253

254

=== 2.3.1 Basic SDI-12 debug command ===

255

256

257

User can run some basic SDI-12 command to debug the connection to the SDI-12 sensor. These commands can be sent via AT Command or LoRaWAN downlink command.

258

259

If SDI-12 sensor return value after get these commands, //SDI-12-LB// will uplink the return on FPORT=100, otherwise, if there is no response from SDI-12 sensor. //SDI-12-LB// will uplink NULL (0x 4E 55 4C 4C) to server.

260

261

The following is the display information on the serial port and the server.

262

263

264

[[image:image-20230201091027-6.png]]

265

266

267

[[image:image-20230201091027-7.png||height="261" width="1179"]]

==== (% style="color:blue" %)**al! ~-~- Get SDI-12 sensor Identification**(%%) ====

272

273

274

* AT Command: AT+ADDRI=aa

275

* LoRaWAN Downlink(prefix 0xAA00): AA 00 aa

276

277

(% style="color:#037691" %)**Parameter: **(%%)aa: ASCII value of SDI-12 sensor address in downlink or HEX value in AT Command)

278

279

(% style="color:blue" %)**Example : **(%%)AT+ADDRI=0 ( Equal to downlink: 0x AA 00 30)

280

281

282

The following is the display information on the serial port and the server.

283

284

285

[[image:image-20230201091257-8.png]]

286

287

288

[[image:image-20230201091257-9.png||height="225" width="1242"]]

289

290

291

==== (% style="color:blue" %)**aM!,aMC!, aM1!- aM9!, aMC1!- aMC9!**(%%) ====

292

293

294

(% style="color:red" %)**aM! **(%%): Start Non-Concurrent Measurement

295

296

(% style="color:red" %)**aMC! **(%%): Start Non-Concurrent Measurement – Request CRC

297

298

(% style="color:red" %)**aM1!- aM9! **(%%): Additional Measurements

299

300

(% style="color:red" %)**aMC1!- aMC9!**(%%) : Additional Measurements – Request CRC

301

302

303

* AT Command : AT+ADDRM=0,1,0,1

304

305

* LoRaWAN Downlink(prefix 0xAA01): 0xAA 01 30 01 00 01

306

307

Downlink：AA 01 aa bb cc dd

308

309

(% style="color:#037691" %)**aa**(%%): SDI-12 sensor address.

310

311

(% style="color:#037691" %)**bb**(%%): 0: no CRC, 1: request CRC

312

313

(% style="color:#037691" %)**cc**(%%): 1-9: Additional Measurement, 0: no additional measurement

314

315

(% style="color:#037691" %)**dd**(%%): delay (in second) to send (% style="color:#037691" %)__**aD0!**__(%%) to get return.

316

317

318

The following is the display information on the serial port and the server.

319

320

321

[[image:image-20230201091630-10.png]]

322

323

324

[[image:image-20230201091630-11.png||height="247" width="1165"]]

==== (% style="color:blue" %)**aC!, aCC!, aC1!- aC9!, aCC1!- aCC9! **(%%) ====

329

330

331

(% style="color:red" %)**aC!**(%%) : Start Concurrent Measurement

332

333

(% style="color:red" %)**aCC!** (%%): Start Concurrent Measurement – Request CRC

334

335

(% style="color:red" %)**aC1!- aC9!**(%%) : Start Additional Concurrent Measurements

336

337

(% style="color:red" %)**aCC1!- aCC9!**(%%) : Start Additional Concurrent Measurements – Request CRC

338

339

340

* AT Command : AT+ADDRC=0,1,0,1

341

342

* LoRaWAN Downlink(0xAA02): 0xAA 02 30 01 00 01

343

344

Downlink: AA 02 aa bb cc dd

345

346

(% style="color:#037691" %)**aa**(%%): SDI-12 sensor address.

347

348

(% style="color:#037691" %)**bb**(%%): 0: no CRC, 1: request CRC

349

350

(% style="color:#037691" %)**cc**(%%): 1-9: Additional Measurement, 0: no additional measurement

351

352

(% style="color:#037691" %)**dd**(%%): delay (in second) to send (% style="color:#037691" %)__**aD0!**__(%%)__ __to get return.

353

354

355

The following is the display information on the serial port and the server.

356

357

358

[[image:image-20230201091954-12.png]]

359

360

361

[[image:image-20230201091954-13.png||height="203" width="1117"]]

==== (% style="color:blue" %)**aR0!- aR9!, aRC0!- aRC9!**(%%) ====

367

368

369

Start Continuous Measurement

370

371

Start Continuous Measurement – Request CRC

372

373

374

* AT Command : AT+ADDRR=0,1,0,1

375

* LoRaWAN Downlink (0xAA 03): 0xAA 03 30 01 00 01

376

377

Downlink: AA 03 aa bb cc dd

378

379

(% style="color:#037691" %)**aa**(%%): SDI-12 sensor address.

380

381

(% style="color:#037691" %)**bb**(%%): 0: no CRC, 1: request CRC

382

383

(% style="color:#037691" %)**cc**(%%): 1-9: Additional Measurement, 0: no additional measurement

384

385

(% style="color:#037691" %)**dd**(%%): delay (in second) to send (% style="color:#037691" %)__**aD0!**__(%%) to get return.

386

387

388

The following is the display information on the serial port and the server.

389

390

391

[[image:image-20230201092208-14.png]]

392

393

394

[[image:image-20230201092208-15.png||height="214" width="1140"]]

395

396

397

=== 2.3.2 Advance SDI-12 Debug command ===

398

399

400

This command can be used to debug all SDI-12 command.

401

402

403

LoRaWAN Downlink: A8 aa xx xx xx xx bb cc

404

405

(% style="color:#037691" %)**aa **(%%): total SDI-12 command length

406

407

(% style="color:#037691" %)**xx **(%%): SDI-12 command

408

409

(% style="color:#037691" %)**bb **(%%): Delay to wait for return

410

411

(% style="color:#037691" %)**cc **(%%): 0: don't uplink return to LoRaWAN, 1: Uplink return to LoRaWAN on FPORT=100

412

413

414

(% style="color:blue" %)**Example: **(%%) AT+CFGDEV =0RC0!,1

415

416

(% style="color:#037691" %)**0RC0! **(%%): SDI-12 Command,

417

418

(% style="color:#037691" %)**1 **(%%): Delay 1 second. ( 0: 810 mini-second)

419

420

Equal Downlink: 0xA8 05 30 52 43 30 21 01 01

421

422

423

The following is the display information on the serial port and the server.

424

425

426

[[image:image-20230201092355-16.png]]

427

428

429

[[image:image-20230201092355-17.png||height="426" width="1135"]]

430

431

432

=== 2.3.3 Convert ASCII to String ===

433

434

435

This command is used to convert between ASCII and String format.

436

437

AT+CONVFORM ( Max length: 80 bytes)

438

439

440

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

441

442

1) AT+CONVFORM=0, string Convert String from String to ASCII

443

444

[[image:1675214845056-885.png]]

445

446

447

2) AT+CONVFORM=1, ASCII Convert ASCII to String.

448

449

[[image:1675214856590-846.png]]

450

451

452

=== 2.3.4 Define periodically SDI-12 commands and uplink. ===

453

454

455

AT+COMMANDx & AT+DATACUTx

456

457

User can define max 15 SDI-12 Commands (AT+COMMAND1 ~~ AT+COMMANDF). On each uplink period (TDC time, default 20 minutes), SDI-12-LB will send these SDI-12 commands and wait for return from SDI-12 sensors. SDI-12-LB will then combine these returns and uplink via LoRaWAN.

458

459

460

* (% style="color:blue" %)**AT Command:**

461

462

(% style="color:#037691" %)**AT+COMMANDx=var1,var2,var3,var4.**

463

464

(% style="color:red" %)**var1**(%%): SDI-12 command , for example: 0RC0!

465

466

(% style="color:red" %)**var2**(%%): Wait timeout for return. (unit: second)

467

468

(% style="color:red" %)**var3**(%%): Whether to send //addrD0!// to get return after var2 timeout. 0: Don't Send //addrD0! //; 1: Send //addrD0!//.

469

470

(% style="color:red" %)**var4**(%%): validation check for return. If return invalid, SDI-12-LB will resend this command. Max 2 retries.

471

472

(% style="color:red" %)**0 **(%%) No validation check;

473

474

(% style="color:red" %)**1** (%%) Check if return chars are printable char(0x20 ~~ 0x7E);

475

476

(% style="color:red" %)**2**(%%) Check if there is return from SDI-12 sensor

477

478

(% style="color:red" %)**3** (%%) Check if return pass CRC check ( SDI-12 command var1 must include CRC request);

479

480

481

Each AT+COMMANDx is followed by a (% style="color:blue" %)**AT+DATACUT**(%%) command. AT+DATACUT command is used to take the useful string from the SDI-12 sensor so the final payload will have the minimum length to uplink.

482

483

484

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

485

486

(% border="1" style="background-color:#f7faff; width:436px" %)

487

|(% style="width:433px" %)(((

488

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

489

490

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

491

492

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

493

494

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

495

)))

496

497

For example, if return from AT+COMMAND1 is “013METER TER12 112T12-00024895” , Below AT+DATACUT1 will get different result to combine payload:

498

499

500

(% border="1" cellspacing="4" style="background-color:#f7faff; width:510px" %)

501

|=(% style="width: 164px;" %)**AT+DATACUT1 value**|=(% style="width: 344px;" %)**Final Result to combine Payload**

502

|(% style="width:164px" %)34,1,1+2+3|(% style="width:344px" %)0D 00 01 30 31 33

503

|(% style="width:164px" %)34,2,1~~8+12~~16|(% style="width:344px" %)0D 00 01 30 31 33 4D 45 54 45 52 54 45 52 31 32

504

|(% style="width:164px" %)34,2,1~~34|(% style="width:344px" %)0D 00 01 30 31 33 4D 45 54 45 52 20 20 20 54 45 52 31 32 20 31 31 32 54 31 32 2D 30 30 30 32 34 38 39 35 0D 0A

505

506

* (% style="color:blue" %)** Downlink Payload:**

507

508

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

509

510

511

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

512

513

514

Format: ** (% style="color:#037691" %)AF MM NN LL XX XX XX XX YY(%%)**

Where:

* (% style="color:#037691" %)**MM **(%%): the AT+COMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,

519

* (% style="color:#037691" %)**NN **(%%): 1: set the AT+DATACUT value ; 2: set the AT+DATACUT value.

520

* (% style="color:#037691" %)**LL **(%%): The length of AT+COMMAND or AT+DATACUT command

521

* (% style="color:#037691" %)**XX XX XX XX **(%%): AT+COMMAND or AT+DATACUT command

522

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

523

524

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

525

526

[[image:image-20230201094129-18.png]]

(% style="color:blue" %)**Clear SDI12 Command**

531

532

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

533

534

535

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

536

537

(% style="color:#4f81bd" %)**AT+CMDEAR=mm,nn** (%%) mm: start position of erase ,nn: stop position of erase

538

539

540

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

541

542

543

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

544

545

(% style="color:#4f81bd" %)**0x09 aa bb**(%%) same as AT+CMDEAR=aa,bb

(% style="color:blue" %)**command combination**

550

551

Below shows a screen shot how the results combines together to a uplink payload.

552

553

[[image:1675215745275-920.png]]

554

555

556

If user don't want to use DATACUT for some command, he simply want to uplink all returns. AT+ALLDATAMOD can be set to 1.

557

558

(% style="color:blue" %)**AT+ALLDATAMOD**(%%) will simply get all return and don't do CRC check as result for SDI-12 command. AT+DATACUTx command has higher priority, if AT+DATACUTx has been set, AT+ALLDATAMOD will be ignore for this SDI-12 command.

559

560

561

(% style="color:#4f81bd" %)**For example: **(%%) as below photo, AT+ALLDATAMOD=1, but AT+DATACUT1 has been set, AT+DATACUT1 will be still effect the result.

562

563

564

[[image:1675215782925-448.png]]

565

566

567

If AT+ALLDATAMOD=1, (% style="color:#4f81bd" %)**FX,X**(%%) will be added in the payload, FX specify which command is used and X specify the length of return. for example in above screen, F1 05 means the return is from AT+COMMAND1 and the return is 5 bytes.

(% style="color:blue" %)**Compose Uplink**

572

573

(% style="color:#4f81bd" %)**AT+DATAUP=0**

574

575

Compose the uplink payload with value returns in sequence and send with **__A SIGNLE UPLINK__**.

576

577

Final Payload is **__Battery Info+PAYVER + VALID Value from RETURN1 + Valid Value from RETURN2 + … + RETURNx__**

578

579

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

580

581

582

[[image:1675215828102-844.png]]

583

584

585

(% style="color:#4f81bd" %)**AT+DATAUP=1**

586

587

Compose the uplink payload with value returns in sequence and send with **__Multiply UPLINKs__**.

588

589

Final Payload is __**Battery Info+PAYVER + PAYLOAD COUNT + PAYLOAD# + DATA**__

590

591

1. Battery Info (2 bytes): Battery voltage

592

1. PAYVER (1 byte): Defined by AT+PAYVER

593

1. PAYLOAD COUNT (1 byte): Total how many uplinks of this sampling.

594

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

595

1. DATA: Valid value: max 6 bytes(US915 version here, Notice*!) for each uplink so each uplink <= 11 bytes. For the last uplink, DATA will might less than 6 bytes

596

597

[[image:1675215848113-696.png]]

598

599

600

(% style="color:red" %)**Notice: the Max bytes is according to the max support bytes in different Frequency Bands for lowest SF. As below:**

601

602

* For AU915/AS923 bands, if UplinkDwell time=0, max 51 bytes for each uplink ( so 51 -5 = 46 max valid date)

603

* For AU915/AS923 bands, if UplinkDwell time=1, max 11 bytes for each uplink ( so 11 -5 = 6 max valid date).

604

* For US915 band, max 11 bytes for each uplink ( so 11 -5 = 6 max valid date).

605

* For all other bands: max 51 bytes for each uplink ( so 51 -5 = 46 max valid date).

606

607

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

608

609

(% 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.**

610

611

612

== 2.4 Uplink Payload ==

613

614

615

Uplink payloads have two types:

616

617

* Distance Value: Use FPORT=2

618

* Other control commands: Use other FPORT fields.

619

620

The application server should parse the correct value based on FPORT settings.

621

622

623

=== 2.4.1 Device Payload, FPORT~=5 ===

624

625

626

Include device configure status. Once SDI-12-LB Joined the network, it will uplink this message to the server.

627

628

Users can also use the downlink command(0x26 01) to ask SDI-12-LB to resend this uplink.

629

630

(% border="1" cellspacing="4" style="background-color:#f7faff; width:420px" %)

631

|(% colspan="6" style="width:434px" %)**Device Status (FPORT=5)**

Example parse in TTNv3

636

637

[[image:1675215946738-635.png]]

638

639

640

(% style="color:#037691" %)**Sensor Model**(%%): For SDI-12-LB, this value is 0x17

641

642

(% style="color:#037691" %)**Firmware Version**(%%): 0x0100, Means: v1.0.0 version

643

644

(% style="color:#037691" %)**Frequency Band**:

*0x01: EU868

*0x02: US915

*0x03: IN865

*0x04: AU915

*0x05: KZ865

*0x06: RU864

*0x07: AS923

*0x08: AS923-1

*0x09: AS923-2

*0x0a: AS923-3

*0x0b: CN470

*0x0c: EU433

*0x0d: KR920

*0x0e: MA869

(% style="color:#037691" %)**Sub-Band**:

676

677

AU915 and US915:value 0x00 ~~ 0x08

678

679

CN470: value 0x0B ~~ 0x0C

680

681

Other Bands: Always 0x00

682

683

684

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

685

686

Check the battery voltage.

Ex1: 0x0B45 = 2885mV

Ex2: 0x0B49 = 2889mV

=== 2.4.2 Uplink Payload, FPORT~=2 ===

694

695

696

There are different cases for uplink. See below

697

698

* SDI-12 Debug Command return: FPORT=100

699

700

* Periodically Uplink: FPORT=2

701

702

(% border="1" cellspacing="4" style="background-color:#f7faff; width:500px" %)

703

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

704

**Size(bytes)**

705

)))|=(% style="width: 80px;" %)**2**|=(% style="width: 90px;" %)**1**|=(% style="width: 240px;" %)**Length depends on the return from the commands**

706

|(% style="width:93px" %)**Value**|(% style="width:83px" %)(((

Battery(mV)

&

Interrupt_Flag

)))|(% style="width:91px" %)[[PAYLOAD_VER>>||anchor="H3.6Setthepayloadversion"]]|(% style="width:212px" %)(((

711

If the valid payload is too long and exceed the maximum support.

712

Payload length in server,server will show payload not provided in the LoRaWAN server.

713

)))

714

715

[[image:1675216282284-923.png]]

716

717

718

=== 2.4.3 Battery Info ===

719

720

721

Check the battery voltage for SDI-12-LB.

Ex1: 0x0B45 = 2885mV

Ex2: 0x0B49 = 2889mV

=== 2.4.4 Interrupt Pin ===

729

730

731

This data field shows if this packet is generated by (% style="color:#037691" %)**Interrupt Pin**(%%) or not. [[Click here>>||anchor="H3.2SetInterruptMode"]] for the hardware and software set up. Note: The Internet Pin is a separate pin in the screw terminal. See [[pin mapping>>||anchor="H1.7PinMapping"]].

**Example:**

Ex1: 0x0B45:0x0B&0x80= 0x00 Normal uplink packet.

736

737

Ex2: 0x8B49:0x8B&0x80= 0x80 Interrupt Uplink Packet.

738

739

740

=== 2.4.5 Payload version ===

=== 2.4.6 Decode payload in The Things Network ===

745

746

747

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

748

749

[[image:1675216779406-595.png]]

750

751

752

There is no fix payload decoder in LoRaWAN server because the SDI-12 sensors returns are different. User need to write the decoder themselves for their case.

753

754

SDI-12-LB TTN Payload Decoder: [[https:~~/~~/github.com/dragino/dragino-end-node-decoder>>url:https://github.com/dragino/dragino-end-node-decoder]]

755

756

757

== 2.5 Uplink Interval ==

758

759

760

The SDI-12-LB by default uplink the sensor data every 20 minutes. User can change this interval by AT Command or LoRaWAN Downlink Command. See this link:

761

762

[[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20AT%20Commands%20and%20Downlink%20Command/#H4.1ChangeUplinkInterval>>http://wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20AT%20Commands%20and%20Downlink%20Command/#H4.1ChangeUplinkInterval]]]]

763

764

765

== 2.6 Frequency Plans ==

766

767

768

The SDI-12-LB uses OTAA mode and below frequency plans by default. If user want to use it with different frequency plan, please refer the AT command sets.

769

770

[[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20Frequency%20Band/>>url:http://wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20Frequency%20Band/]]

771

772

773

== 2.7 Firmware Change Log ==

774

775

776

**Firmware download link:**

777

778

[[https:~~/~~/www.dropbox.com/sh/qrbgbikb109lkiv/AACBR-v_ZhZAMengcY7Nsa1ja?dl=0>>https://www.dropbox.com/sh/qrbgbikb109lkiv/AACBR-v_ZhZAMengcY7Nsa1ja?dl=0]]

779

780

781

= 3. Configure SDI-12-LB via AT Command or LoRaWAN Downlink =

782

783

784

Use can configure SDI-12-LB via AT Command or LoRaWAN Downlink.

785

786

* AT Command Connection: See [[FAQ>>||anchor="H7.FAQ"]].

787

* LoRaWAN Downlink instruction for different platforms: See [[IoT LoRaWAN Server>>http://wiki.dragino.com/xwiki/bin/view/Main/]] section.

788

789

There are two kinds of commands to configure SDI-12-LB, they are:

790

791

* (% style="color:blue" %)**General Commands**.

792

793

These commands are to configure:

794

795

* General system settings like: uplink interval.

796

* LoRaWAN protocol & radio related command.

797

798

They are same for all Dragino Device which support DLWS-005 LoRaWAN Stack. These commands can be found on the wiki:

799

800

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

801

802

803

* (% style="color:blue" %)**Commands special design for SDI-12-LB**

804

805

These commands only valid for SDI-12-LB, as below:

806

807

808

== 3.1 Set Transmit Interval Time ==

809

810

811

Feature: Change LoRaWAN End Node Transmit Interval.

812

813

(% style="color:blue" %)**AT Command: AT+TDC**

814

815

(% border="1" cellspacing="4" style="background-color:#f7faff; color:black; width:510px" %)

816

|=(% style="width: 156px;" %)**Command Example**|=(% style="width: 137px;" %)**Function**|=**Response**

817

|(% style="width:156px" %)AT+TDC=?|(% style="width:137px" %)Show current transmit Interval|(((

818

30000

819

OK

820

the interval is 30000ms = 30s

821

)))

822

|(% style="width:156px" %)AT+TDC=60000|(% style="width:137px" %)Set Transmit Interval|(((

823

OK

824

Set transmit interval to 60000ms = 60 seconds

825

)))

826

827

(% style="color:blue" %)**Downlink Command: 0x01**

828

829

830

Format: Command Code (0x01) followed by 3 bytes time value.

831

832

If the downlink payload=0100003C, it means set the END Node's Transmit Interval to 0x00003C=60(S), while type code is 01.

833

834

* Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds

835

* Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds

== 3.2 Set Interrupt Mode ==

840

841

842

Feature, Set Interrupt mode for GPIO_EXIT.

843

844

(% style="color:blue" %)**AT Command: AT+INTMOD**

845

846

(% border="1" cellspacing="4" style="background-color:#f7faff; color:black; width:510px" %)

847

|=(% style="width: 156px;" %)**Command Example**|=(% style="width: 187px;" %)**Function**|=(% style="width: 165px;" %)**Response**

848

|(% style="width:156px" %)AT+INTMOD=?|(% style="width:187px" %)Show current interrupt mode|(% style="width:165px" %)(((

849

0

850

OK

851

the mode is 0 = No interruption

852

)))

853

|(% style="width:156px" %)AT+INTMOD=2|(% style="width:187px" %)(((

854

Set Transmit Interval

855

~1. (Disable Interrupt),

856

2. (Trigger by rising and falling edge)

857

3. (Trigger by falling edge)

858

4. (Trigger by rising edge)

859

)))|(% style="width:165px" %)OK

860

861

(% style="color:blue" %)**Downlink Command: 0x06**

862

863

Format: Command Code (0x06) followed by 3 bytes.

864

865

This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.

866

867

* Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode

868

* Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger

== 3.3 Set the output time ==

873

874

875

Feature, Control the output 3V3 , 5V or 12V.

876

877

(% style="color:blue" %)**AT Command: AT+3V3T**

878

879

(% border="1" cellspacing="4" style="background-color:#f7faff; color:black; width:474px" %)

880

|=(% style="width: 154px;" %)**Command Example**|=(% style="width: 201px;" %)**Function**|=(% style="width: 116px;" %)**Response**

881

|(% style="width:154px" %)AT+3V3T=?|(% style="width:201px" %)Show 3V3 open time.|(% style="width:116px" %)(((

0

OK

)))

|(% style="width:154px" %)AT+3V3T=0|(% style="width:201px" %)Normally open 3V3 power supply.|(% style="width:116px" %)(((

OK

default setting

)))

|(% style="width:154px" %)AT+3V3T=1000|(% style="width:201px" %)Close after a delay of 1000 milliseconds.|(% style="width:116px" %)(((

890

OK

891

)))

892

|(% style="width:154px" %)AT+3V3T=65535|(% style="width:201px" %)Normally closed 3V3 power supply.|(% style="width:116px" %)(((

OK

)))

(% style="color:blue" %)**AT Command: AT+5VT**

897

898

(% border="1" cellspacing="4" style="background-color:#f7faff; color:black; width:470px" %)

899

|=(% style="width: 155px;" %)**Command Example**|=(% style="width: 196px;" %)**Function**|=(% style="width: 114px;" %)**Response**

900

|(% style="width:155px" %)AT+5VT=?|(% style="width:196px" %)Show 5V open time.|(% style="width:114px" %)(((

0

OK

)))

|(% style="width:155px" %)AT+5VT=0|(% style="width:196px" %)Normally closed 5V power supply.|(% style="width:114px" %)(((

OK

default setting

)))

|(% style="width:155px" %)AT+5VT=1000|(% style="width:196px" %)Close after a delay of 1000 milliseconds.|(% style="width:114px" %)(((

909

OK

910

)))

911

|(% style="width:155px" %)AT+5VT=65535|(% style="width:196px" %)Normally open 5V power supply.|(% style="width:114px" %)(((

OK

)))

(% style="color:blue" %)**AT Command: AT+12VT**

916

917

(% border="1" cellspacing="4" style="background-color:#f7faff; color:black; width:443px" %)

918

|=(% style="width: 156px;" %)**Command Example**|=(% style="width: 199px;" %)**Function**|=(% style="width: 83px;" %)**Response**

919

|(% style="width:156px" %)AT+12VT=?|(% style="width:199px" %)Show 12V open time.|(% style="width:83px" %)(((

0

OK

)))

|(% style="width:156px" %)AT+12VT=0|(% style="width:199px" %)Normally closed 12V power supply.|(% style="width:83px" %)OK

924

|(% style="width:156px" %)AT+12VT=500|(% style="width:199px" %)Close after a delay of 500 milliseconds.|(% style="width:83px" %)(((

OK

)))

(% style="color:blue" %)**Downlink Command: 0x07**

929

930

Format: Command Code (0x07) followed by 3 bytes.

931

932

The first byte is which power, the second and third bytes are the time to turn on.

933

934

* Example 1: Downlink Payload: 070101F4 **~-~-->** AT+3V3T=500

935

* Example 2: Downlink Payload: 0701FFFF **~-~-->** AT+3V3T=65535

936

* Example 3: Downlink Payload: 070203E8 **~-~-->** AT+5VT=1000

937

* Example 4: Downlink Payload: 07020000 **~-~-->** AT+5VT=0

938

* Example 5: Downlink Payload: 070301F4 **~-~-->** AT+12VT=500

939

* Example 6: Downlink Payload: 07030000 **~-~-->** AT+12VT=0

== 3.4 Set the all data mode ==

944

945

946

Feature, Set the all data mode.

947

948

(% style="color:blue" %)**AT Command: AT+ALLDATAMOD**

949

950

(% border="1" cellspacing="4" style="background-color:#f7faff; width:437px" %)

951

|=**Command Example**|=**Function**|=**Response**

952

|AT+ALLDATAMOD=?|Show current all data mode|(((

0

OK

)))

|AT+ALLDATAMOD=1|Set all data mode is 1.|OK

957

958

(% style="color:blue" %)**Downlink Command: 0xAB**

959

960

Format: Command Code (0xAB) followed by 1 bytes.

961

962

* Example 1: Downlink Payload: AB 00 ~/~/ AT+ALLDATAMOD=0

963

* Example 2: Downlink Payload: AB 01 ~/~/ AT+ALLDATAMOD=1

== 3.5 Set the splicing payload for uplink ==

968

969

970

Feature, splicing payload for uplink.

971

972

(% style="color:blue" %)**AT Command: AT+DATAUP**

973

974

(% border="1" cellspacing="4" style="background-color:#f7faff; width:510px" %)

975

|=(% style="width: 154px;" %)**Command Example**|=(% style="width: 266px;" %)**Function**|=**Response**

976

|(% style="width:154px" %)AT+DATAUP =?|(% style="width:266px" %)Show current splicing payload for uplink mode|(((

0

OK

)))

|(% style="width:154px" %)AT+DATAUP =0|(% style="width:266px" %)(((

981

Set splicing payload for uplink mode is 0.

)))|(((

OK

)))

|(% style="width:154px" %)AT+DATAUP =1|(% style="width:266px" %)Set splicing payload for uplink mode is 1 , and the each splice uplink is sent sequentially.|OK

986

|(% style="width:154px" %)AT+DATAUP =1,20000|(% style="width:266px" %)(((

987

Set splicing payload for uplink mode is 1, and the uplink interval of each splice to 20000 milliseconds.

988

)))|OK

989

990

(% style="color:blue" %)**Downlink Command: 0xAD**

991

992

Format: Command Code (0xAD) followed by 1 bytes or 5 bytes.

993

994

* Example 1: Downlink Payload: AD 00 ~/~/ AT+DATAUP=0

995

* Example 2: Downlink Payload: AD 01 ~/~/ AT+DATAUP =1

996

* Example 3: Downlink Payload: AD 01 00 00 14 ~/~/ AT+DATAUP =1,20000

997

998

This means that the interval is set to 0x000014=20S

999

1000

1001

== 3.6 Set the payload version ==

1002

1003

1004

Feature, Set the payload version.

1005

1006

(% style="color:blue" %)**AT Command: AT+PAYVER**

1007

1008

(% border="1" cellspacing="4" style="background-color:#f7faff; width:437px" %)

1009

|=(% style="width: 158px;" %)**Command Example**|=(% style="width: 192px;" %)**Function**|=**Response**

1010

|(% style="width:158px" %)AT+PAYVER=?|(% style="width:192px" %)Show current payload version|(((

1

OK

)))

|(% style="width:158px" %)AT+PAYVER=5|(% style="width:192px" %)Set payload version is 5.|OK

1015

1016

(% style="color:blue" %)**Downlink Command: 0xAE**

1017

1018

Format: Command Code (0xAE) followed by 1 bytes.

1019

1020

* Example 1: Downlink Payload: AE 01 ~/~/ AT+PAYVER=1

1021

* Example 2: Downlink Payload: AE 05 ~/~/ AT+PAYVER=5

= 4. Battery & how to replace =

1026

1027

== 4.1 Battery Type ==

1028

1029

1030

SDI-12-LB is equipped with a [[8500mAH ER26500 Li-SOCI2 battery>>https://www.dropbox.com/sh/w9l2oa3ytpculph/AAAPtt-apH4lYfCj-2Y6lHvQa?dl=0]]. The battery is un-rechargeable battery with low discharge rate targeting for 8~~10 years use. This type of battery is commonly used in IoT target for long-term running, such as water meter.

1031

1032

1033

The discharge curve is not linear so can’t simply use percentage to show the battery level. Below is the battery performance.

1034

1035

[[image:1675234124233-857.png]]

1036

1037

1038

Minimum Working Voltage for the SDI-12-LB:

1039

1040

SDI-12-LB: 2.45v ~~ 3.6v

1041

1042

1043

== 4.2 Replace Battery ==

1044

1045

1046

Any battery with range 2.45 ~~ 3.6v can be a replacement. We recommend to use Li-SOCl2 Battery.

1047

1048

And make sure the positive and negative pins match.

1049

1050

1051

== 4.3 Power Consumption Analyze ==

1052

1053

1054

Dragino Battery powered product are all runs in Low Power mode. We have an update battery calculator which base on the measurement of the real device. User can use this calculator to check the battery life and calculate the battery life if want to use different transmit interval.

1055

1056

Instruction to use as below:

1057

1058

(% style="color:blue" %)**Step 1:**(%%) Downlink the up-to-date DRAGINO_Battery_Life_Prediction_Table.xlsx from: [[https:~~/~~/www.dropbox.com/sh/zwex6i331j5oeq2/AACIMf9f_v2qsJ39CuMQ5Py_a?dl=0>>https://www.dropbox.com/sh/zwex6i331j5oeq2/AACIMf9f_v2qsJ39CuMQ5Py_a?dl=0]]

1059

1060

(% style="color:blue" %)**Step 2:**(%%) Open it and choose

* Product Model

* Uplink Interval

* Working Mode

And the Life expectation in difference case will be shown on the right.

1067

1068

1069

[[image:1675234155374-163.png]]

1070

1071

1072

The battery related documents as below:

1073

1074

* [[Battery Dimension>>https://www.dropbox.com/s/ox5g9njwjle7aw3/LSN50-Battery-Dimension.pdf?dl=0]],

1075

* [[Lithium-Thionyl Chloride Battery datasheet, Tech Spec>>https://www.dropbox.com/sh/d4oyfnp8o94180o/AABQewCNSh5GPeQH86UxRgQQa?dl=0]]

1076

* [[Lithium-ion Battery-Capacitor datasheet>>https://www.dropbox.com/s/791gjes2lcbfi1p/SPC_1520_datasheet.jpg?dl=0]], [[Tech Spec>>https://www.dropbox.com/s/4pkepr9qqqvtzf2/SPC1520%20Technical%20Specification20171123.pdf?dl=0]]

1077

1078

[[image:image-20230201145019-19.png]]

1079

1080

1081

=== 4.3.1 Battery Note ===

1082

1083

1084

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

1085

1086

1087

=== 4.3.2 Replace the battery ===

1088

1089

1090

You can change the battery in the SDI-12-LB.The type of battery is not limited as long as the output is between 3v to 3.6v. On the main board, there is a diode (D1) between the battery and the main circuit. If you need to use a battery with less than 3.3v, please remove the D1 and shortcut the two pads of it so there won't be voltage drop between battery and main board.

1091

1092

The default battery pack of SDI-12-LB includes a ER26500 plus super capacitor. If user can't find this pack locally, they can find ER26500 or equivalence, which will also work in most case. The SPC can enlarge the battery life for high frequency use (update period below 5 minutes)

1093

1094

1095

= 5. Remote Configure device =

1096

1097

== 5.1 Connect via BLE ==

1098

1099

1100

Please see this instruction for how to configure via BLE: [[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/BLE%20Bluetooth%20Remote%20Configure/>>url:http://wiki.dragino.com/xwiki/bin/view/Main/BLE%20Bluetooth%20Remote%20Configure/]]

1101

1102

1103

== 5.2 AT Command Set ==

= 6. OTA firmware update =

1108

1109

1110

Please see this link for how to do OTA firmware update.

1111

1112

[[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/Firmware%20OTA%20Update%20for%20Sensors/>>url:http://wiki.dragino.com/xwiki/bin/view/Main/Firmware%20OTA%20Update%20for%20Sensors/]]

= 7. FAQ =

== 7.1 How to use AT Command to access device? ==

1118

1119

1120

See: [[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/UART%20Access%20for%20LoRa%20ST%20v4%20base%20model/#H1.LoRaSTv4baseHardware>>url:http://wiki.dragino.com/xwiki/bin/view/Main/UART%20Access%20for%20LoRa%20ST%20v4%20base%20model/#H1.LoRaSTv4baseHardware]]

1121

1122

1123

== 7.2 How to update firmware via UART port? ==

1124

1125

1126

See: [[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/UART%20Access%20for%20LoRa%20ST%20v4%20base%20model/#H1.LoRaSTv4baseHardware>>url:http://wiki.dragino.com/xwiki/bin/view/Main/UART%20Access%20for%20LoRa%20ST%20v4%20base%20model/#H1.LoRaSTv4baseHardware]]

1127

1128

1129

== 7.3 How to change the LoRa Frequency Bands/Region? ==

1130

1131

1132

You can follow the instructions for [[how to upgrade image>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]].

1133

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

= 8. Order Info =

(((

(% style="color:blue" %)**Part Number: SDI-12-LB-XXX**

)))

(((

XXX: The default frequency band

)))

(((

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

1149

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

1150

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

1151

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

1152

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

1153

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

1154

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

1155

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

)))

= 9. Packing Info =

(% style="color:#037691" %)**Package Includes**:

1163

1164

* SDI-12-LB SDI-12 to LoRaWAN Converter x 1

1165

1166

(% style="color:#037691" %)**Dimension and weight**:

* Device Size: cm

* Device Weight: g

* Package Size / pcs : cm

* Weight / pcs : g

= 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.

1179

1180

* 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]]

1181

1182

Wiki source code of SDI-12-LB -- SDI-12 to LoRaWAN Converter User Manual

Applications

Navigation