MQTT Forward Instruction

* Firmware Version > LG02_LG08-5.3.1580178039 [[Firmware Download>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_Gateway/LPS8/Firmware/Release/]]

15

* LG01N, OLG01N ((% class="mark" %)**Warning**(%%): LG01-P LG01-S use another instruction: [[MQTT for LG01-P/LG01S>>url:https://wiki.dragino.com/index.php/Through_MQTT_to_upload_data]])

16

* LG02, OLG02

* LG308, DLOS8

* LPS8

* LIG16

* MS14 series if installed with the same firmware. (in this case, the MQTT forward will work , but no LoRa support)

21

22

23

= 2. Firmware Change Log for MQTT feature =

24

25

(((

26

This instruction is wrote start from LG02_LG08-5.3.1580178039. Below is related change log since this version of firmware.

27

)))

28

29

* LG02_LG08-5.3.1580178039

** Initiate version

= 3. MQTT forward operating principle =

34

35

== 3.1 Network Structure ==

36

37

Below shows the network structure for MQTT forwarding.

38

39

* For Uplink: The sensor sends data to LoRa Gateway via LoRa wireless, The gateway will process these data and forward to remote MQTT Broker via Internet.

40

* For Downlink: The gateway subscribe a topic in the MQTT broker, when there is update on the topic, the gateway will know and broadcast the data to Local LoRa network,

41

42

[[image:https://wiki.dragino.com/images/thumb/4/45/MQTT_Forward_1.png/600px-MQTT_Forward_1.png||height="348" width="600"]]

43

44

General MQTT structure

45

46

47

== 3.2 How sensor data is forwarded ==

48

49

In this MQTT forward feature, the key point is how the gateway process the sensor data.

50

51

52

=== 3.2.1 Upstream ===

53

54

Assume there are two sensor nodes, their ID are Node1 ID: 6734 , Node2 ID: 7456. In the remote MQTT broker there are two topics: Topic1: /channel/765800, Topic2: /channel/367860. We can set up in the gateway to map Node1 to Topic1 and Node2 to Topic2. So when there is a sensor data from Node1, the gateway will forward the data to Topic1, when there is sensor data from Node2, the gateway will forward to Topic2.

55

56

(((

57

The data flow works as below diagram.

58

)))

59

60

[[~[~[image:https://wiki.dragino.com/images/thumb/2/2a/MQTT_Forward_2.png/600px-MQTT_Forward_2.png~|~|height="355" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:MQTT_Forward_2.png]]

(((

Upstream path

)))

(((

Note: The sensor data can base or LoRa or other method, as long as there are data on the file /var/iot/channels. /span>

)))

(((

)))

=== 3.2.2 Downstream ===

75

76

The gateway subscribes to a topic of the remote MQTT broker topic. When there is some one publish a value on this topic. The gateway will get it and broadcast to local LoRa Network.

77

78

(((

79

Below are the data flow for downstream.

80

)))

81

82

[[image:https://wiki.dragino.com/images/thumb/3/3a/MQTT_Forward_3.png/600px-MQTT_Forward_3.png||height="368" width="600"]]

Downstream path

== 3.3 Macro Definition ==

88

89

The MQTT publish command use Macro settings to generate flexible upstream payload for MQTT publish.

90

91

(((

92

Currently the (% class="mark" %)**-t (topic)**(%%) and (% class="mark" %)**-m (message)**(%%) support Macros.

93

)))

94

95

=== 3.3.1 -t topic macro ===

96

97

* CHANNEL: Remote Channel ID

98

* CLIENTID: Client ID , Same as -i

99

* WRITE_API: Remote Channel Write API

100

* USERNAME: User ID (-u)

101

* HOSTNAME: Device Hostname

102

103

=== 3.3.2 -m message macro ===

104

105

* HOSTNAME: Device Hostname

106

* CHANNEL: Remote Channel ID

107

* DATA: Sensor Data without time stamp and rssi

108

* META: Completely sensor data with time stamp and rssi

109

* JSON: Convert META to json format.

110

111

=== 3.3.3 Example for Macro ===

112

113

[[image:https://wiki.dragino.com/images/thumb/c/c7/MQTT_Command_9.png/600px-MQTT_Command_9.png||height="385" width="600"]]

114

115

MQTT Publish configure

116

117

Above screen shots shows below format:

118

119

* -t: CLIENTID/CHANNEL/data

120

* -m: DATA

121

122

When there is a LoRa sensor arrive. it will be store at the /var/iot/channels as below:

123

124

[[image:https://wiki.dragino.com/images/thumb/c/c4/MQTT_Command_20.png/600px-MQTT_Command_20.png||height="325" width="600"]]

Sensor Data

(((

According to above macro. Gateway will publish (% class="mark" %)**field1=22.0&field2=49.0**(%%) to topic: (% class="mark" %)**dragino-1b7060/78901/data**(%%), where 78901 is the remote channel for this node ID.

)))

== 3.4 Modify the MQTT to support more options ==

134

135

The MQTT Client Utility used in Dragino is **mosquitto_pub** and **mosquitto_sub**. User can add more options to the mqtt commands. User can check the valid options by command mosquitto_pub ~-~-help. as below:

(% class="box" %)

(((

root@dragino-1ec39c:~~# mosquitto_pub ~-~-help

140

mosquitto_pub is a simple mqtt client that will publish a message on a single topic and exit.

141

mosquitto_pub version 1.6.4 running on libmosquitto 1.6.4.

142

143

Usage: mosquitto_pub {[-h host] [-p port] [-u username] [-P password] -t topic | -L URL}

144

{-f file | -l | -n | -m message}

145

[-c] [-k keepalive] [-q qos] [-r] [~-~-repeat N] [~-~-repeat-delay time]

146

[-A bind_address]

147

[-i id] [-I id_prefix]

148

[-d] [~-~-quiet]

149

[-M max_inflight]

150

[-u username [-P password]]

151

[~-~-will-topic [~-~-will-payload payload] [~-~-will-qos qos] [~-~-will-retain]]

152

[{~-~-cafile file | ~-~-capath dir} [~-~-cert file] [~-~-key file]

153

[~-~-ciphers ciphers] [~-~-insecure]

154

[~-~-tls-alpn protocol]

155

[~-~-tls-engine engine] [~-~-keyform keyform] [~-~-tls-engine-kpass-sha1]]

156

[~-~-psk hex-key ~-~-psk-identity identity [~-~-ciphers ciphers]]

157

[~-~-proxy socks-url]

158

[~-~-property command identifier value]

159

[-D command identifier value]

160

mosquitto_pub ~-~-help

161

162

-A : bind the outgoing socket to this host/ip address. Use to control which interface

163

the client communicates over.

164

-d : enable debug messages.

165

-D : Define MQTT v5 properties. See the documentation for more details.

166

-f : send the contents of a file as the message.

167

-h : mqtt host to connect to. Defaults to localhost.

168

-i : id to use for this client. Defaults to mosquitto_pub_ appended with the process id.

169

-I : define the client id as id_prefix appended with the process id. Useful for when the

170

broker is using the clientid_prefixes option.

171

-k : keep alive in seconds for this client. Defaults to 60.

172

-L : specify user, password, hostname, port and topic as a URL in the form:

173

mqtt(s):~/~/[username[:password]@]host[:port]/topic

174

-l : read messages from stdin, sending a separate message for each line.

175

-m : message payload to send.

176

-M : the maximum inflight messages for QoS 1/2..

177

-n : send a null (zero length) message.

178

-p : network port to connect to. Defaults to 1883 for plain MQTT and 8883 for MQTT over TLS.

179

-P : provide a password

180

-q : quality of service level to use for all messages. Defaults to 0.

181

-r : message should be retained.

182

-s : read message from stdin, sending the entire input as a message.

183

-t : mqtt topic to publish to.

184

-u : provide a username

185

-V : specify the version of the MQTT protocol to use when connecting.

186

Can be mqttv5, mqttv311 or mqttv31. Defaults to mqttv311.

187

~-~-help : display this message.

188

~-~-repeat : if publish mode is -f, -m, or -s, then repeat the publish N times.

189

~-~-repeat-delay : if using ~-~-repeat, wait time seconds between publishes. Defaults to 0.

190

~-~-quiet : (% class="mark" %)don't print error messages.

191

~-~-will-payload : payload for the client Will, which is sent by the broker in case of

192

unexpected disconnection. If not given and will-topic is set, a zero

193

length message will be sent.

194

~-~-will-qos : QoS level for the client Will.

195

~-~-will-retain : if given, make the client Will retained.

196

~-~-will-topic : the topic on which to publish the client Will.

197

~-~-cafile : path to a file containing trusted CA certificates to enable encrypted

198

communication.

199

~-~-capath : path to a directory containing trusted CA certificates to enable encrypted

200

communication.

201

~-~-cert : client certificate for authentication, if required by server.

202

~-~-key : client private key for authentication, if required by server.

203

~-~-keyform : keyfile type, can be either "pem" or "engine".

204

~-~-ciphers : openssl compatible list of TLS ciphers to support.

205

~-~-tls-version : TLS protocol version, can be one of tlsv1.3 tlsv1.2 or tlsv1.1.

206

Defaults to tlsv1.2 if available.

207

~-~-insecure : do not check that the server certificate hostname matches the remote

208

hostname. Using this option means that you cannot be sure that the

209

remote host is the server you wish to connect to and so is insecure.

210

Do not use this option in a production environment.

211

~-~-tls-engine : If set, enables the use of a TLS engine device.

212

~-~-tls-engine-kpass-sha1 : SHA1 of the key password to be used with the selected SSL engine.

213

~-~-psk : pre-shared-key in hexadecimal (no leading 0x) to enable TLS-PSK mode.

214

~-~-psk-identity : client identity string for TLS-PSK mode.

215

~-~-proxy : SOCKS5 proxy URL of the form:

216

socks5h:~/~/[username[:password]@]hostname[:port]

217

Only "none" and "username" authentication is supported.

218

219

See https:~/~/mosquitto.org/ for more information.

)))

(((

and modify the /usr/bin/mqtt_process.sh script, the location to change the command option is below lines:

)))

(% class="box" %)

(((

# Call MQTT Publish command

230

231

# 1. Case with User, Password and Client ID present (e.g. Azure)

232

if [ ! -z "$pass" ] && [ ! -z "$user" ] && [ ! -z "$clientID" ]; then

233

case="1"

234

mosquitto_pub $D -h $server -p $port -q $pub_qos -i $clientID -t $pub_topic -u $user -P "$pass" $C $cafile $PUB_FLAG "$mqtt_data"

235

236

# 2. Case with Certificate, Key and ClientID present (e.g. AWS)

237

elif [ ! -z "$certfile" ] && [ ! -z "$key" ] && [ ! -z "$clientID" ]; then

238

case="2"

239

mosquitto_pub $D -h $server -p $port -q $pub_qos -i $clientID -t $pub_topic ~-~-cert $cert ~-~-key $key $C $cafile $PUB_FLAG "$mqtt_data"

240

241

# 3. Case with no User, Certificate or ClientID present

242

elif [ -z "$user" ] && [ -z "$certfile" ] && [ -z "$clientID" ]; then

243

case="3"

244

mosquitto_pub $D -h $server -p $port -q $pub_qos -t $pub_topic $PUB_FLAG "$mqtt_data"

245

246

# 4. Case with no User, Certificate, but with ClientID present

247

elif [ -z "$user" ] && [ -z "$certfile" ] && [ ! -z "$clientID" ]; then

248

case="4"

249

mosquitto_pub $D -h $server -p $port -q $pub_qos -i $clientID -t $pub_topic $PUB_FLAG "$mqtt_data"

250

251

# 5. Case with User and ClientID present, but no Password and no Certificate present

252

elif [ -z "$pass" ] && [ -z "$certfile" ] && [ ! -z "$user" ] && [ ! -z "$clientID" ]; then

253

case="5"

254

mosquitto_pub $D -h $server -p $port -q $pub_qos -i $clientID -t $pub_topic -u $user $PUB_FLAG "$mqtt_data"

255

256

# 6. Case with User and Password present, but no ClientID and no Certificate present

257

elif [ ! -z "$user" ] && [ ! -z "$pass" ] && [ -z "$clientID" ] && [ -z "$certfile" ]; then

258

case="6"

259

mosquitto_pub $D -h $server -p $port -q $pub_qos -t $pub_topic -u $user -P "$pass" $PUB_FLAG "$mqtt_data"

260

261

# 0. Else - invalid parameters, just log

262

else

263

case="Invalid parameters"

264

logger "[IoT.MQTT]:Invalid Parameters - mosquitto_pub not called."

fi

)))

= 4. Example to communicate to a simple MQTT server =

== 4.1 Overview ==

This section is an example to show how to set up LG01-N to communicate with a MQTT server. The MQTT server is a simple utility set up in a local PC. Note: User can set up same server via [[this instruction>>url:http://www.steves-internet-guide.com/install-mosquitto-broker/]].

274

275

== 4.2 Simulate via MQTT.fx utility ==

276

277

The [[MQTT.fx>>url:http://mqttfx.jensd.de/index.php/download]] is a MQTT client tool. We can use this to simulate a MQTT connection to our MQTT broker first to make sure the MQTT broker works. This will also help us understand how it works.

278

279

(((

280

In this test, the MQTT broker and MQTT.fx are installed in the same PC, so the MQTT server address in MQTT.fx should be localhost. Below shows how to connect to the server.

281

)))

282

283

[[image:https://wiki.dragino.com/images/thumb/0/06/MQTT_Forward_4.png/600px-MQTT_Forward_4.png||height="201" width="600"]]

284

285

Connect to MQTT Broker

286

287

After connected, use publish to public some thing to MQTT server. This to simulate upsteam

288

289

[[image:https://wiki.dragino.com/images/thumb/b/bd/MQTT_Forward_5.png/600px-MQTT_Forward_5.png||height="149" width="600"]]

290

291

Upstream: Publish message to MQTT Broker

292

293

To simulate a downstream, use MQTT.fx to subscribe a topic, and publish something to this topic. as Below:

294

295

[[image:https://wiki.dragino.com/images/thumb/3/3d/MQTT_Forward_6.png/600px-MQTT_Forward_6.png||height="279" width="600"]]

296

297

Downstream: Subscribe a topic to get downstream

298

299

300

== 4.3 Simulate via Dragino Command Line ==

301

302

For first try of MQTT connection, simulate via command line is recommend, there are many servers / connection type for MQTT. They are using different connection parameters. Simulating the connection via command line will help us rapidly connect to server and debug.

303

304

In the Dragino Gateway, we use [[mosquitto client>>url:https://mosquitto.org/]] for MQTT connection.

305

306

307

(% class="mark" %)**For Upstream**

308

309

command is [[mosquitto_pub>>url:https://mosquitto.org/man/mosquitto_pub-1.html]]

310

311

Example: mosquitto_pub -h 192.168.199.148 -p 1883 -t /channel/6543 -m temp=36

312

313

Note: 192.168.199.148 is MQTT broker address, the gateway and the MQTT broker PC are in the same network.

314

315

[[image:https://wiki.dragino.com/images/thumb/d/d0/MQTT_Command_6.png/600px-MQTT_Command_6.png||height="188" width="600"]]

mosquitto_pub

(% class="mark" %)**For Downstream**

321

322

Use [[mosquitto_sub>>url:https://mosquitto.org/man/mosquitto_sub-1.html]] to subscribe the change on the topic.

323

324

[[image:https://wiki.dragino.com/images/thumb/8/89/MQTT_Command_7.png/600px-MQTT_Command_7.png||height="267" width="600"]]

mosquitto_sub

== 4.4 Configure Dragino UI for MQTT connection ==

330

331

This chapter are step by step to show to configure the Dragino Menu for MQTT auto connection.

332

333

(((

334

Go to (% class="mark" %)**Dragino Menu ~-~-> MQTT Client**

335

)))

336

337

[[image:https://wiki.dragino.com/images/thumb/b/bc/MQTT_Command_8.png/600px-MQTT_Command_8.png||height="249" width="600"]]

338

339

go to mqtt configure menu

340

341

(((

342

Select **Forward to MQTT server**. (% class="mark" %)**Notice**(%%): This option is removed from the latest firmware, in the latest firmware, if user submit "SAVE & APPLY" in MQTT page, the gateway will use MQTT service.

343

)))

344

345

[[image:https://wiki.dragino.com/images/thumb/1/14/MQTT_Commands_8.png/600px-MQTT_Commands_8.png||height="240" width="600"]]

forward to MQTT

=== 4.4.1 Configure the MQTT Client for Upstream ===

351

352

Below screenshot is same as the publish command:

(% class="box" %)

(((

mosquitto_pub -h 192.168.199.148 -p 1883 -i dragino-1b7060 -t CLIENTID/CHANNEL/data -m DATA

357

~/~/where the CLIENTID, CHANNEL & DATA are macro. represent for

358

~/~/CLIENTID: dragino-1b7060

359

~/~/CHANNEL: Remote ID in Channel settings; here is 78901 or 567456

360

~/~/DATA: The data stores in /var/iot/channels/

361

)))

362

363

[[image:https://wiki.dragino.com/images/thumb/c/c7/MQTT_Command_9.png/600px-MQTT_Command_9.png||height="385" width="600"]]

364

365

MQTT Publish configure

366

367

368

[[image:https://wiki.dragino.com/images/thumb/b/b7/MQTT_Command_10.png/600px-MQTT_Command_10.png||height="544" width="600"]]

369

370

MQTT Channel settings

371

372

(((

373

For example, if we put a data(temp=46) on the file /var/iot/channels/4567, because 4567 match the remote channel 78901. the gateway will run this command:

)))

(% class="box" %)

(((

mosquitto_pub -h 192.168.199.148 -p 1883 -i dragino-1b7060 -t dragino-1b7060/78901/data -m temp=46

)))

(((

to MQTT broker.

)))

(((

Below is a simulation to put this data to active the MQTT publish.

388

)))

389

390

[[image:https://wiki.dragino.com/images/thumb/3/30/MQTT_Command_11.png/600px-MQTT_Command_11.png||height="308" width="600"]]

MQTT Publish

=== 4.4.2 Configure the MQTT Client for Downstream ===

396

397

Below screen shot equal to this subscribe command:

(% class="box" %)

(((

mosquitto_sub -h 192.168.199.148 -p 1883 -i dragino-1b7060 -t command.

402

)))

403

404

[[image:https://wiki.dragino.com/images/3/36/MQTT_Command_12.png||height="173" width="579"]]

MQTT Subscribe

(((

When MQTT broker receive a update on this topic, the gateway will get the update and use LoRa radio to broadcast this message. The LoRa parameters used for update is:

411

)))

412

413

[[image:https://wiki.dragino.com/images/thumb/b/b8/MQTT_Command_13.png/600px-MQTT_Command_13.png||height="300" width="600"]]

414

415

LoRa Broadcast parameters.

416

417

418

And below is the subscribe simulation:

419

420

[[image:https://wiki.dragino.com/images/thumb/6/60/MQTT_Command_14.png/600px-MQTT_Command_14.png||height="255" width="600"]]

421

422

downstream simulation

423

424

425

== 4.5 Add LoRa support to communicate with remote sensor ==

426

427

In above section, we have configured the UI to support MQTT upstream and downstream. We can simulate via Linux command. In this section, we will guide how to communicate with remote LoRa End Node for upstream and downstream.

428

429

=== 4.5.1 Use LoRa Raw protocol for communication ~-~- For LG01/LG02 ===

430

431

(((

432

We can use [[LoRa Shield>>url:http://www.dragino.com/products/lora/item/102-lora-shield.html]] to send LoRa Raw data to Gateway and receive data from gateway.

)))

(((

The example Sketch for LoRa Shield +Arduino is here: [[LoRa_Shield_Sketch_For_MQTT>>url:http://www.dragino.com/downloads/index.php?dir=LoraShield/]]

)))

(((

And this link is the required library: [[arduino-LoRa-master>>url:http://www.dragino.com/downloads/index.php?dir=LoraShield/]]. Unzip this library and put in Arduino library location.

)))

(((

What does the Arduino Sketch do? The Arduino Sketch will:

445

)))

446

447

* Upstream: Keep sending a LoRa Message every minutes with this payload : <4567>tem=xx&hum=yy (Where xx and yy are temperature and humidity value generated randomly).

448

* Downstream: Listening broadcast message from gateway, and print it in console.

449

* The LoRa parameter settings in Arduino should match the LoRa settings in gateway, as below:

450

451

[[image:https://wiki.dragino.com/images/thumb/3/3b/MQTT_Command_17.png/600px-MQTT_Command_17.png||height="197" width="600"]]

452

453

LoRa Parameter should match

454

455

456

Below is the test result after the Arduino Sketch is running.

457

458

[[image:https://wiki.dragino.com/images/thumb/6/63/MQTT_Command_18.png/600px-MQTT_Command_18.png||height="319" width="600"]]

Upstream Data Flow

[[image:https://wiki.dragino.com/images/thumb/1/18/MQTT_Command_19.png/600px-MQTT_Command_19.png||height="309" width="600"]]

Downstream Data Flow

=== 4.5.2 Use LoRaWAN Protocol for communication ~-~- For LG308/LPS8/DLOS8 ===

468

469

(((

470

Since firmware LG02_LG08~-~-build-v5.3.1585192026-20200326-1109, Dragino LoRaWAN gateways support the communication to LoRaWAN ABP end node locally without the need of LoRaWAN server. This feature allow us to integrate MQTT in the gateway to support LoRaWAN to MQTT forwarding or visa verse.

)))

(((

When use test this feature, please use the version higher then : LG02_LG08~-~-build-v5.4.1593400722-20200629-1120, in this version, the upload format is changed and readable, which is easier for integration.

475

Video Instruction:[[https:~~/~~/youtu.be/qJTY441-t90>>url:https://youtu.be/qJTY441-t90]]

)))

(((

Step 1: Refer [[Communicate with ABP End Node>>url:https://wiki.dragino.com/index.php/Communication_with_ABP_End_Node]] to know how to set up LG308 to work with LoRaWAN End node.

)))

(((

Step 2: Make sure your Radio settings match the End Node settings.

484

)))

485

486

[[image:https://wiki.dragino.com/images/thumb/f/f7/LG308_MQTT_5.png/600px-LG308_MQTT_5.png||height="387" width="600"]]

487

488

Use Same Frequency Band as End Node

(((

Step 3: Set up publish format and MQTT channel. The LG308 will store the Data from End node in HEX format in the file. And we need to config the format to META

493

)))

494

495

[[image:https://wiki.dragino.com/images/thumb/8/8d/LG308_MQTT_3.png/600px-LG308_MQTT_3.png||height="385" width="600"]]

496

497

Publish mush use META as data format for LG308

498

499

500

Step 4: Map the Device Address to Remote ID in MQTT server.

501

502

[[image:https://wiki.dragino.com/images/thumb/7/7f/LG308_MQTT_4.png/600px-LG308_MQTT_4.png||height="335" width="600"]]

503

504

Map Dev Addr to remote ID

505

506

507

Step 5: Upstream: Save the change, we can see the log info via "sytem log", End Node and MQTT Server

508

509

[[image:https://wiki.dragino.com/images/thumb/b/be/LG308_MQTT_6.png/600px-LG308_MQTT_6.png||height="279" width="600"]]

Upstream Process

[[image:https://wiki.dragino.com/images/thumb/0/07/LG308_MQTT_6_1.png/600px-LG308_MQTT_6_1.png||height="246" width="600"]]

Choose ASCII Format

[[image:https://wiki.dragino.com/images/thumb/a/a3/LG308_MQTT_6_2.png/600px-LG308_MQTT_6_2.png||height="248" width="600"]]

LHT65 Decoder

Step 6: Set up subscribe: Subscribe a topci for downstream.

522

523

[[image:https://wiki.dragino.com/images/thumb/b/b9/LG308_MQTT_7.png/600px-LG308_MQTT_7.png||height="176" width="600"]]

Subscribe to a topic

Step 7: Downstream: Save the change, we can see the log info via "sytem log", End Node and MQTT Server.

529

530

[[image:https://wiki.dragino.com/images/thumb/9/97/LG308_MQTT_8.png/600px-LG308_MQTT_8.png||height="298" width="600"]]

Downstream Flow

Notice: The text use for Downstream must meet the requirement from [[LG308 Downstream Payload>>url:https://wiki.dragino.com/index.php/Communication_with_ABP_End_Node#Downstream]]

535

536

537

= 5. Example For Different MQTT Servers =

538

539

(% style="width:731.222px" %)

540

|=(% style="width: 270px;" %)(((

541

[[image:https://wiki.dragino.com/images/thumb/7/73/ThingSpeak1.png/200px-ThingSpeak1.png||alt="ThingSpeak1.png" height="114" width="233"]]

542

543

== [[ThingSpeak Server>>url:http://www.thingspeak.com/]] ==

544

545

546

[[Examples>>url:https://wiki.dragino.com/index.php/ThingSpeak_Examples]]

547

)))|=(% style="width: 242px;" %)(((

548

[[image:https://wiki.dragino.com/images/thumb/3/3b/Lewei50.png/200px-Lewei50.png||alt="Lewei50.png" height="65" width="223"]]

549

550

(% class="wikigeneratedid" %)

551

== ==

552

553

== [[乐联网平台>>url:https://www.lewei50.com/]] ==

554

555

556

[[lewei Example>>url:https://wiki.dragino.com/index.php/Lewei_Example_mqtt]]

557

)))|=(% style="width: 214px;" %)(((

558

[[image:https://wiki.dragino.com/images/thumb/a/aa/AWS-IOT.png/200px-AWS-IOT.png||alt="AWS-IOT.png" height="112" width="183"]]

559

560

== [[AWS-IOT>>url:https://aws.amazon.com/cn/iot-platform/how-it-works/]] ==

561

562

563

[[AWS Examples>>url:https://wiki.dragino.com/index.php/MQTT_Forward_to_Amazon_AWS-IOT]]

)))

= 6. How to Debug =

User can login the gateway's console and run (% class="mark" %)**logread -f**(%%). It will shows the output when there is packet arrive.User can see if it is correct.

569

570

= 7. How to ask for Support =

571

572

If a user still not have trouble making it works. please send a mail to support@dragino.com with the below info:

573

574

* Detail of your LoRaWAN end node.

575

* Gateway Model and firmware version

576