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Wiki source code of DMT01

Version 1.1 by Edwin Chen on 2025/07/27 12:55
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3 [[image:https://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/CPL03-NB_NB-IoT_Pulse_Contact_Sensor_User_Manual/WebHome/image-20231012084342-1.png?width=701&height=530&rev=1.1||alt="image-20231012084342-1.png"]]
4
5
6 **Table of Contents:**
7
8 {{toc/}}
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10 (% aria-label="macro:toc widget" contenteditable="false" role="region" tabindex="-1" %)
11 (((
12 (% style="background-image:url(http://wiki1.dragino.com/xwiki/webjars/wiki%3Axwiki/application-ckeditor-webjar/1.61/plugins/widget/images/handle.png); background:rgba(220,220,220,0.5); display:none" %)[[image:data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==||height="15" role="presentation" title="Click and drag to move" width="15"]]
13 )))
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21
22
23 = 1.  Introduction =
24
25 == 1.1 ​ What is POM01-NB NB-IoT Power Outage Monitoring Sensor ==
26
27
28 The POM01-NB integrates (% style="color:blue" %)**NB-IoT wireless module**(%%), which sends signals to the cloud platform when triggering alarms or timed reports, and is suitable for remote monitoring scenarios with wide coverage and low power consumption.
29
30 The POM01-NB adopts optocoupler isolation technology to detect whether the (% style="color:blue" %)**220V**(%%) power supply is normal or not, and can set the (% style="color:blue" %)**180V**(%%) low voltage trigger threshold to start the alarm logic immediately when the voltage drops abnormally.
31
32 The main power supply of POM01-NB is directly powered by (% style="color:blue" %)**220V AC**(%%), and the backup power can be seamlessly switched after a power failure, guaranteeing continuous operation for 30 days.
33
34 POM01-NB has a wide temperature operating range, and the battery supports cyclic charging and discharging, adapting to complex industrial environments.
35
36 POM01-NB (% style="color:blue" %)**supports BLE configure**(%%) and (% style="color:blue" %)**wireless OTA update**(%%) which make user easy to use.
37
38 POM01-NB supports different uplink methods include (% style="color:blue" %)**TCP, MQTT, UDP, MQTTs or CoAP**(%%) for different application requirement. and Support Uplinks to various IoT Servers.
39
40 POM01-NB has optional built-in SIM card and default IoT server connection version. Which makes it works with simple configuration.
41
42
43 == ​1.2  Features ==
44
45
46 * NB-IoT Bands: B1/B2/B3/B4/B5/B8/B12/B13/B17/B18/B19/B20/B25/B28/B66/B70/B85 @H-FDD
47 * Ultra-low power consumption
48 * Power Outage Monitoring
49 * Uplink via MQTT, MQTTs, TCP, UDP or CoAP
50 * Support Bluetooth v5.1 remote configure and update firmware
51 * Uplink on periodically
52 * Downlink to change configure
53 * Back up rechargeable 1000mAh battery
54
55 (% style="display:none" %)
56
57 == 1.3 Specification ==
58
59
60 (% style="color:blue" %)**Common DC Characteristics:**
61
62 * Supply Voltage: 90 ~~230v
63 * Operating Temperature: -40 ~~ 85°C
64
65 (% style="color:blue" %)**NB-IoT Spec:**
66
67 (% style="color:#037691" %)**NB-IoT Module: BC660K-GL**
68
69 (% style="color:#037691" %)**Support Bands:**
70
71 * B1 @H-FDD: 2100MHz
72 * B2 @H-FDD: 1900MHz
73 * B3 @H-FDD: 1800MHz
74 * B4 @H-FDD: 2100MHz
75 * B5 @H-FDD: 860MHz
76 * B8 @H-FDD: 900MHz
77 * B12 @H-FDD: 720MHz
78 * B13 @H-FDD: 740MHz
79 * B17 @H-FDD: 730MHz
80 * B18 @H-FDD: 870MHz
81 * B19 @H-FDD: 870MHz
82 * B20 @H-FDD: 790MHz
83 * B25 @H-FDD: 1900MHz
84 * B28 @H-FDD: 750MHz
85 * B66 @H-FDD: 2000MHz
86 * B70 @H-FDD: 2000MHz
87 * B85 @H-FDD: 700MHz
88
89 (% style="color:blue" %)**Battery:**
90
91 * Back up rechargeable 1000mAh battery
92
93 (% style="color:blue" %)**Power Consumption**
94
95 * ldle: 4mA
96 * Transmit: max 40mA
97
98 == 1.4 ​ Applications ==
99
100
101 * Electricity Meter
102 * Line Voltage
103
104 == 1.5 Sleep mode and working mode ==
105
106
107 (% style="color:blue" %)**Deep Sleep Mode:**(%%)** **Sensor doesn't have any NB-IoT activate. This mode is used for storage and shipping to save battery life.
108
109 (% style="color:blue" %)**Working Mode:**(%%) In this mode, Sensor will work as NB-IoT Sensor to Join NB-IoT 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.
110
111
112 == 1.6 Button & LEDs ==
113
114
115 [[image:https://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/D20-LBD22-LBD23-LB_LoRaWAN_Temperature_Sensor_User_Manual/WebHome/1675071855856-879.png?rev=1.1||alt="1675071855856-879.png"]]
116
117 (% border="1" cellspacing="3" style="background-color:#f2f2f2; width:510px" %)
118 |=(% style="width: 167px;background-color:#4F81BD;color:white" %)**Behavior on ACT**|=(% style="width: 117px;background-color:#4F81BD;color:white" %)**Function**|=(% style="width: 226px;background-color:#4F81BD;color:white" %)**Action**
119 |(% style="background-color:#f2f2f2; width:167px" %)Pressing ACT between 1s < time < 3s|(% style="background-color:#f2f2f2; width:117px" %)Send an uplink|(% style="background-color:#f2f2f2; width:225px" %)(((
120 If sensor has already attached to NB-IoT network, sensor will send an uplink packet, (% style="color:blue" %)**blue led**(%%) will blink once.
121 Meanwhile, BLE module will be active and user can connect via BLE to configure device.
122 )))
123 |(% style="background-color:#f2f2f2; width:167px" %)Pressing ACT for more than 3s|(% style="background-color:#f2f2f2; width:117px" %)Active Device|(% style="background-color:#f2f2f2; width:225px" %)(((
124 (% style="background-color:#f2f2f2; color:green" %)**Green led**(%%) will fast blink 5 times, device will enter (% style="color:#037691" %)**OTA mode**(%%) for 3 seconds. And then start to attach NB-IoT network.
125 (% style="background-color:#f2f2f2; color:green" %)**Green led**(%%) will solidly turn on for 5 seconds after joined in network.
126 Once sensor is active, BLE module will be active and user can connect via BLE to configure device, no matter if device attach NB-IoT network or not
127 )))
128 |(% style="background-color:#f2f2f2; width:167px" %)Fast press ACT 5 times.|(% style="background-color:#f2f2f2; width:117px" %)Deactivate Device|(% style="background-color:#f2f2f2; width:225px" %)(((
129 (% style="color:red" %)**Red led**(%%) will solid on for 5 seconds. Means device is in Deep Sleep Mode.
130 )))
131
132 == 1.7 BLE connection ==
133
134
135 POM01-NB support BLE remote configure and firmware update.
136
137 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:
138
139 * Press button to send an uplink
140 * Press button to active device.
141 * Device Power on or reset.
142
143 If there is no activity connection on BLE in 60 seconds, sensor will shut down BLE module to enter low power mode.
144
145
146 == 1.8 Pin Definitions , Switch & SIM Direction ==
147
148
149 [[image:https://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/S31-NBS31B-NB_BN-IoT_Outdoor_Temperature_Humidity_Sensor_User_Manual/WebHome/image-20230819104805-5.png?rev=1.1||alt="image-20230819104805-5.png"]]
150
151 === 1.8.1 Jumper JP2 ===
152
153 Power on Device when put this jumper.
154
155 Power off device when take out this jumper
156
157
158 === 1.8.2 BOOT MODE / SW1 ===
159
160 **1)** (% style="color:blue" %)**ISP:**(%%) upgrade mode, device won't have any signal in this mode. but ready for upgrade firmware. LED won't work. Firmware won't run.
161
162 **2)** (% style="color:blue" %)**Flash:**(%%) work mode, device starts to work and send out console output for further debug
163
164
165 === 1.8.3 Reset Button ===
166
167 Press to reboot the device.
168
169
170 === 1.8.4 SIM Card Direction ===
171
172 See this link. [[How to insert SIM Card>>url:http://wiki.dragino.com/xwiki/bin/view/Main/General%20Configure%20to%20Connect%20to%20IoT%20server%20for%20-NB%20%26%20-NS%20NB-IoT%20models/#H2.AttachNetwork]].
173
174
175 == 1.9 Mechanical ==
176
177
178 [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/PS-LB%20--%20LoRaWAN%20Pressure%20Sensor/WebHome/image-20240109160800-6.png?rev=1.1||alt="image-20240109160800-6.png"]]
179
180
181 == 1.10  Hardware connection ==
182
183
184 === 1.10.1 Pins of AC detect module ===
185
186 [[image:image-20250320154706-2.png||height="180" width="499"]]
187
188 [[image:image-20250320154542-1.png||height="183" width="496"]]
189
190
191 === 1.10.2 Connection between AC detect module and POM01-NB motherboard ===
192
193 * VBAT <~-~--> VDD
194 * DATA1 <~-~--> PA8 (Tentative as interrupt pin 1)
195 * DATA2 <~-~--> PB15 (Tentative as interrupt pin 2)
196 * GND <~-~--> GND
197
198 [[image:image-20250320173553-3.png||height="409" width="602"]]
199
200 === 1.10.3 Connection between AC detect module and AC power supply(90 ~~230v) ===
201
202 * AC_N <~-~--> AC power supply N
203 * AC_L <~-~--> AC power supply L
204
205 [[image:image-20250320175924-5.png||height="231" width="770"]]
206
207
208 = 2.  Use POM01-NB to communicate with IoT Server =
209
210 == 2.1  Send data to IoT server via NB-IoT network ==
211
212 (((
213 (((
214
215 )))
216
217 The POM01-NB is equipped with a NB-IoT module, the pre-loaded firmware in POM01-NB will get environment data from sensors and send the value to local NB-IoT network via the NB-IoT module.  The NB-IoT network will forward this value to IoT server via the protocol defined by POM01-NB.
218
219 Below shows the network structure:
220 )))
221
222
223
224 (% class="box infomessage" %)
225 (((
226 To be updated...
227 )))
228
229
230 There are two version: (% style="color:blue" %)**-GE**(%%) and (% style="color:blue" %)**-1T**(%%) version of POM01-NB.
231
232 (% style="color:blue" %)**GE Version:**(%%) This version doesn't include SIM card or point to any IoT server. User needs to use AT Commands to configure below two steps to set POM01-NB send data to IoT server.
233
234 * Install NB-IoT SIM card and configure APN. See instruction of [[Attach Network>>url:http://wiki.dragino.com/xwiki/bin/view/Main/General%20Configure%20to%20Connect%20to%20IoT%20server%20for%20-NB%20%26%20-NS%20NB-IoT%20models/#H2.AttachNetwork]].
235
236 * Set up sensor to point to IoT Server. See instruction of [[Configure to Connect Different Servers>>url:http://wiki.dragino.com/xwiki/bin/view/Main/General%20Configure%20to%20Connect%20to%20IoT%20server%20for%20-NB%20%26%20-NS%20NB-IoT%20models/#H3.Configuretoconnecttodifferentservers]]. 
237
238 Below shows result of different server as a glance.
239
240 (% border="1" cellspacing="3" style="width:515px" %)
241 |(% style="background-color:#4f81bd; color:white; width:100px" %)**Servers**|(% style="background-color:#4f81bd; color:white; width:300px" %)**Dash Board**|(% style="background-color:#4f81bd; color:white; width:115px" %)**Comments**
242 |(% style="width:127px" %)[[Node-Red>>url:http://wiki.dragino.com/xwiki/bin/view/Main/General%20Configure%20to%20Connect%20to%20IoT%20server%20for%20-NB%20%26%20-NS%20NB-IoT%20models/#H3.5A0Node-RedA028viaA0MQTT29]]|(% style="width:385px" %)[[image:https://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/S31-NBS31B-NB_BN-IoT_Outdoor_Temperature_Humidity_Sensor_User_Manual/WebHome/image-20230819113244-8.png?width=367&height=183&rev=1.1||alt="image-20230819113244-8.png"]](((
243
244 )))|(% style="width:170px" %)
245 |(% style="width:127px" %)[[DataCake>>url:http://wiki.dragino.com/xwiki/bin/view/Main/General%20Configure%20to%20Connect%20to%20IoT%20server%20for%20-NB%20%26%20-NS%20NB-IoT%20models/#H3.4Datacake]]|(% style="width:385px" %)[[image:https://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/S31-NBS31B-NB_BN-IoT_Outdoor_Temperature_Humidity_Sensor_User_Manual/WebHome/image-20230819113244-9.png?width=367&height=119&rev=1.1||alt="image-20230819113244-9.png"]](((
246
247 )))|(% style="width:170px" %)
248 |(% style="width:127px" %)[[Tago.IO>>url:http://wiki.dragino.com/xwiki/bin/view/Main/General%20Configure%20to%20Connect%20to%20IoT%20server%20for%20-NB%20%26%20-NS%20NB-IoT%20models/#H3.7A0Tago.ioA028viaA0MQTT29]]|(% style="width:385px" %) |(% style="width:170px" %)
249 |(% style="width:127px" %)[[General UDP>>url:http://wiki.dragino.com/xwiki/bin/view/Main/General%20Configure%20to%20Connect%20to%20IoT%20server%20for%20-NB%20%26%20-NS%20NB-IoT%20models/#H3.1GeneralA0UDPA0Connection]]|(% style="width:385px" %)Raw Payload. Need Developer to design Dash Board|(% style="width:170px" %)
250 |(% style="width:127px" %)[[General MQTT>>url:http://wiki.dragino.com/xwiki/bin/view/Main/General%20Configure%20to%20Connect%20to%20IoT%20server%20for%20-NB%20%26%20-NS%20NB-IoT%20models/#H3.2GeneralA0MQTTA0Connection]]|(% style="width:385px" %)Raw Payload. Need Developer to design Dash Board|(% style="width:170px" %)
251 |(% style="width:127px" %)[[ThingSpeak>>url:http://wiki.dragino.com/xwiki/bin/view/Main/General%20Configure%20to%20Connect%20to%20IoT%20server%20for%20-NB%20%26%20-NS%20NB-IoT%20models/#H3.3A0ThingSpeakA028viaA0MQTT29]]|(% style="width:385px" %)[[image:https://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/S31-NBS31B-NB_BN-IoT_Outdoor_Temperature_Humidity_Sensor_User_Manual/WebHome/image-20230819113244-10.png?width=367&height=104&rev=1.1||alt="image-20230819113244-10.png"]](((
252
253 )))|(% style="width:170px" %)
254 |(% style="width:127px" %)[[ThingsBoard>>url:http://wiki.dragino.com/xwiki/bin/view/Main/General%20Configure%20to%20Connect%20to%20IoT%20server%20for%20-NB%20%26%20-NS%20NB-IoT%20models/#H3.6A0ThingsBoard.CloudA028viaA0MQTT29]]|(% style="width:385px" %)[[image:https://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/S31-NBS31B-NB_BN-IoT_Outdoor_Temperature_Humidity_Sensor_User_Manual/WebHome/image-20230819113244-11.png?width=367&height=141&rev=1.1||alt="image-20230819113244-11.png"]](((
255
256 )))|(% style="width:170px" %)
257
258 (% style="color:blue" %)**1T Version**(%%): This version has 1NCE SIM card pre-installed and configure to send value to ThingsEye. User Just need to select the sensor type in ThingsEyeand Activate POM01-NB and user will be able to see data in ThingsEye. See here for [[ThingsEye Config Instruction>>url:https://wiki.thingseye.io/xwiki/bin/view/Main/]].
259
260
261 == 2.2 ​Payload Types ==
262
263
264 To meet different server requirement, POM01-NB supports different payload type.
265
266 **Includes:**
267
268 * [[General JSON format payload>>||anchor="H2.2.1GeneralJsonFormat28Type3D529"]]. (Type=5)
269
270 * [[HEX format Payload>>||anchor="H2.2.2HEXformatPayload28Type3D029"]]. (Type=0)
271
272 * [[ThingSpeak Format>>||anchor="H2.2.4ThingSpeakPayload28Type3D129"]]. (Type=1)
273
274 * [[ThingsBoard Format>>||anchor="H2.2.3ThingsBoardPayload28Type3D329"]]. (Type=3)
275
276 User can specify the payload type when choose the connection protocol. Example:
277
278
279 (% style="color:#037691" %)**AT+PRO=1,0**  (%%) ~/~/ Use COAP Connection & hex Payload
280
281 (% style="color:#037691" %)**AT+PRO=1,5**   (%%) ~/~/ Use COAP Connection & Json Payload
282
283 (% style="color:#037691" %)**AT+PRO=2,0**  (%%) ~/~/ Use UDP Connection & hex Payload
284
285 (% style="color:#037691" %)**AT+PRO=2,5**   (%%) ~/~/ Use UDP Connection & Json Payload
286
287 (% style="color:#037691" %)**AT+PRO=3,0**  (%%) ~/~/ Use MQTT Connection & hex Payload
288
289 (% style="color:#037691" %)**AT+PRO=3,5 ** (%%) ~/~/ Use MQTT Connection & Json Payload
290
291 (% style="color:#037691" %)**AT+PRO=4,0**  (%%) ~/~/ Use TCP Connection & hex Payload
292
293 (% style="color:#037691" %)**AT+PRO=4,5 ** (%%) ~/~/ Use TCP Connection & Json Payload
294
295
296 === 2.2.1 General Json Format(Type~=5) ===
297
298 (% class="box infomessage" %)
299 (((
300 To be updated...
301 )))
302
303
304 === 2.2.2 HEX format Payload(Type~=0) ===
305
306 (% class="box infomessage" %)
307 (((
308 To be updated...
309 )))
310
311
312
313
314 = 3. Configure POM01-NB =
315
316 == 3.1 Configure Methods ==
317
318
319 POM01-NB supports below configure method:
320
321 * AT Command via Bluetooth Connection (**Recommended**): [[BLE Configure Instruction>>url:http://wiki.dragino.com/xwiki/bin/view/Main/BLE%20Bluetooth%20Remote%20Configure/]].
322
323 * AT Command via UART Connection : See [[UART Connection>>url:http://wiki.dragino.com/xwiki/bin/view/Main/UART%20Access%20for%20LoRa%20ST%20v4%20base%20model/#H2.3UARTConnectionforSN50v3basemotherboard]].
324
325 == ​​​3.2  Serial Access Password ==
326
327
328 After the Bluetooth or UART connection is successful, use the Serial Access Password to enter the AT command window.
329
330 The label on the box of the node will print the initial password: AT+PIN=**xxxxxx**, and directly use the six-digit password to access the AT instruction window.
331
332 (((
333 (((
334 [[image:https://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/RS485-NB%2C-NS_RS485%2CUART_to_NB-IoT_Converter_User_Manual/WebHome/image-20250226165815-1.png?rev=1.1||alt="image-20250226165815-1.png"]]
335 )))
336
337 (((
338 (% title="Click and drag to resize" %)​(%%)If you need to change the password, use **AT+PWORD=**xxxxxx (6 characters), -CB nodes only support lowercase letters.
339
340 [[image:https://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/S31-CBS31B-CB--NB-IoTLTE-M_Temperature%26Humidity_Sensor_User_Manual/WebHome/image-20240826183254-2.png?rev=1.1||alt="image-20240826183254-2.png"]]
341
342 (% style="color:red" %)**Note: After entering the command, you need to add a line break, and you can also set automatic line breaks in the Bluetooth tool or UART connection tool.**
343
344 [[image:https://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/S31-CBS31B-CB--NB-IoTLTE-M_Temperature%26Humidity_Sensor_User_Manual/WebHome/image-20240826183302-3.png?rev=1.1||alt="image-20240826183302-3.png"]]
345
346
347 == 3.3 AT Commands Set ==
348
349
350 (% class="box infomessage" %)
351 (((
352 To be updated...
353 )))
354 )))
355 )))
356
357
358 = 4. Battery & Power Consumption =
359
360
361 LPOM01-NB use ER26500 + SPC1520 battery pack and POM01-NB use 3000mAh Recharable Battery with Solar Panel. See below link for detail information about the battery info and how to replace.
362
363 [[**Battery Info & Power Consumption Analyze**>>url:http://wiki.dragino.com/xwiki/bin/view/Main/How%20to%20calculate%20the%20battery%20life%20of%20Dragino%20sensors%3F/]] .
364
365
366 = 5. Firmware update =
367
368
369 User can change device firmware to:
370
371 * Update with new features.
372
373 * Fix bugs.
374
375 Firmware and changelog can be downloaded from : **Firmware download link **(% class="mark" %)(To be updated...)
376
377 Methods to Update Firmware:
378
379 * (Recommended way) OTA firmware update via BLE: [[**Instruction**>>url:http://wiki.dragino.com/xwiki/bin/view/Main/BLE_Firmware_Update_NB_Sensors_BC660K-GL/]].
380
381 * Update through UART TTL interface : **[[Instruction>>url:http://wiki.dragino.com/xwiki/bin/view/Main/UART_Access_for_NB_ST_BC660K-GL/#H4.2UpdateFirmware28Assumethedevicealreadyhaveabootloader29]]**.
382
383 (((
384
385 )))
386
387 = 6.  FAQ =
388
389 == 6.1 How can I access the BC660K-GL AT Commands? ==
390
391
392 User can access to BC660K-GL directly and send AT Commands.
393
394 [[See BC660K-GL AT Command set>>url:https://www.dropbox.com/sh/5f6ssda5fum8rvs/AABT68l8ZzWOvZ5eg2qwOoFda?dl=0]]
395
396
397 = 7.  Order Info =
398
399
400 Part Number: (% style="color:blue" %)**POM01-NB-XX**
401
402 (% style="color:red" %)**XX:**
403
404 * (% style="color:#037691" %)**GE: **(%%)General version ( Exclude SIM card)
405
406 * (% style="color:#037691" %)**1T:**(%%) with 1NCE * 10 years 500MB SIM card and Pre-configure to ThingsEye server
407
408 = 8. ​ Packing Info =
409
410
411 (% style="color:#037691" %)**Package Includes:**
412
413 * POM01-NB NB-IoT Power Outage Monitoring Sensor x 1
414
415 (% style="color:#037691" %)**Dimension and weight:**
416
417 * Device Size: cm
418 * Device Weight: g
419 * Package Size / pcs : cm
420 * Weight / pcs : g
421
422 = 9.  ​Support =
423
424
425 * 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.
426 * 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]].