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Last modified by Mengting Qiu on 2024/09/05 17:35
From version 97.1
edited by Mengting Qiu
on 2023/09/22 09:38
Change comment: Uploaded new attachment "image-20230922093814-1.png", version {1}
To version 86.5
edited by Xiaoling
on 2023/09/12 10:52
Change comment: There is no comment for this version

Summary

Details

Page properties
Author
... ... @@ -1,1 +1,1 @@
1 -XWiki.ting
1 +XWiki.Xiaoling
Content
... ... @@ -148,6 +148,7 @@
148 148  * Sewer
149 149  * Bottom water level monitoring
150 150  
151 +
151 151  == 1.7 Sleep mode and working mode ==
152 152  
153 153  
... ... @@ -175,10 +175,10 @@
175 175  )))
176 176  |(% style="width:167px" %)Fast press ACT 5 times.|(% style="width:117px" %)Deactivate Device|(% style="width:225px" %)(% style="color:red" %)**Red led**(%%) will solid on for 5 seconds. Means device is in Deep Sleep Mode.
177 177  
178 -== 1.9 BLE connection ==
179 +== 1.10 BLE connection ==
179 179  
180 180  
181 -DDS45-NB support BLE remote configure and firmware update.
182 +DDS20-NB support BLE remote configure and firmware update.
182 182  
183 183  
184 184  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:
... ... @@ -190,19 +190,19 @@
190 190  If there is no activity connection on BLE in 60 seconds, sensor will shut down BLE module to enter low power mode.
191 191  
192 192  
193 -== 1.10 Pin Definitions & Switch ==
194 +== 1.11 Pin Definitions & Switch ==
194 194  
195 195  
196 196  [[image:image-20230819104805-5.png]]
197 197  
198 198  
199 -=== 1.10.1 Jumper JP2 ===
200 +=== 1.11.1 Jumper JP2 ===
200 200  
201 201  
202 202  Power on Device when put this jumper.
203 203  
204 204  
205 -=== 1.10.2 BOOT MODE / SW1 ===
206 +=== 1.11.2 BOOT MODE / SW1 ===
206 206  
207 207  
208 208  **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.
... ... @@ -210,7 +210,7 @@
210 210  **2)** (% style="color:blue" %)**Flash**(%%): work mode, device starts to work and send out console output for further debug
211 211  
212 212  
213 -=== 1.10.3 Reset Button ===
214 +=== 1.11.3 Reset Button ===
214 214  
215 215  
216 216  Press to reboot the device.
... ... @@ -218,8 +218,9 @@
218 218  (% style="display:none" %)
219 219  
220 220  
221 -== 1.11 Mechanical ==
222 +== 1.12 Mechanical ==
222 222  
224 +
223 223  [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/D20-LBD22-LBD23-LB_LoRaWAN_Temperature_Sensor_User_Manual/WebHome/1675143884058-338.png?rev=1.1||alt="1675143884058-338.png"]]
224 224  
225 225  [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/D20-LBD22-LBD23-LB_LoRaWAN_Temperature_Sensor_User_Manual/WebHome/1675143899218-599.png?rev=1.1||alt="1675143899218-599.png"]]
... ... @@ -229,16 +229,17 @@
229 229  
230 230  (% style="color:blue" %)**Probe Mechanical:**
231 231  
232 -[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LDDS45%20-%20LoRaWAN%20Distance%20Detection%20Sensor%20User%20Manual/WebHome/1654915562090-396.png?rev=1.1||alt="1654915562090-396.png"]]
234 +[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LDDS20%20-%20LoRaWAN%20Liquid%20Level%20Sensor%20User%20Manual/WebHome/image-20220615090910-1.png?rev=1.1||alt="image-20220615090910-1.png"]]
233 233  
236 +[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LDDS20%20-%20LoRaWAN%20Liquid%20Level%20Sensor%20User%20Manual/WebHome/image-20220615090910-2.png?rev=1.1||alt="image-20220615090910-2.png"]]
234 234  
235 235  
236 -= 2. Use DDS45-NB to communicate with IoT Server =
239 += 2. Use DDS20-NB to communicate with IoT Server =
237 237  
238 238  == 2.1 Send data to IoT server via NB-IoT network ==
239 239  
240 240  
241 -The DDS45-NB is equipped with a NB-IoT module, the pre-loaded firmware in DDS45-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 DDS45-NB.
244 +The DDS20-NB is equipped with a NB-IoT module, the pre-loaded firmware in DDS20-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 DDS20-NB.
242 242  
243 243  
244 244  Below shows the network structure:
... ... @@ -249,7 +249,7 @@
249 249  There are two version: (% style="color:blue" %)**-GE**(%%) and (% style="color:blue" %)**-1D**(%%) version of DDS45-NB.
250 250  
251 251  
252 -(% 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 DDS45-NB send data to IoT server.
255 +(% 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 DDS20-NB send data to IoT server.
253 253  
254 254  * 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]].
255 255  
... ... @@ -279,13 +279,13 @@
279 279  [[image:image-20230819113244-11.png||height="141" width="367"]]
280 280  )))|(% style="width:170px" %)
281 281  
282 -(% style="color:blue" %)**1D Version**(%%): This version has 1NCE SIM card pre-installed and configure to send value to DataCake. User Just need to select the sensor type in DataCake and Activate DDS45-NB and user will be able to see data in DataCake. See here for [[DataCake Config Instruction>>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]].
285 +(% style="color:blue" %)**1D Version**(%%): This version has 1NCE SIM card pre-installed and configure to send value to DataCake. User Just need to select the sensor type in DataCake and Activate DDS20-NB and user will be able to see data in DataCake. See here for [[DataCake Config Instruction>>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]].
283 283  
284 284  
285 285  == 2.2 ​Payload Types ==
286 286  
287 287  
288 -To meet different server requirement, DDS45-NB supports different payload type.
291 +To meet different server requirement, DDS20-NB supports different payload type.
289 289  
290 290  **Includes:**
291 291  
... ... @@ -311,17 +311,14 @@
311 311  
312 312  This is the General Json Format. As below:
313 313  
314 -(% style="color:#4472c4" %)**{"IMEI":"866207058378443","Model":"DDS45-NB","distance":217,"battery":3.54,"signal":24,"1":{221,2023/09/20 09:47:01},"2":{0,2023/09/20 09:15:04},"3":{0,2023/09/20 09:00:04},"4":{0,2023/09/20 08:45:03},"5":{0,2023/09/20 08:30:03},"6":{0,2023/09/20 08:15:03},"7":{0,2023/09/20 08:00:04},"8":{0,2023/09/20 07:45:04}}**
317 +(% style="color:#4472c4" %)**{"IMEI":866207053462762,"temperature":29.2,"humidity":54.2,"battery":3.27,"signal":24,"Model":DDS20-NB, "1":{28.2,48.3,2023/08/10 08:00:37},"2":{28.1,49.1,2023/08/10 07:57:37},"3":{28.1,48.5,2023/08/10 07:54:37},"4":{28.2,48.6,2023/08/10 07:51:37},"5":{28.1,48.9,2023/08/10 07:48:37},"6":{28.2,48.8,2023/08/10 07:45:37},"7":{28.2,48.8,2023/08/10 07:42:37},"8":{28.0,48.8,2023/08/10 07:39:37}}**
315 315  
316 316  
317 -[[image:image-20230920175015-3.png||height="613" width="890"]]
318 -
319 -
320 320  (% style="color:red" %)**Notice, from above payload:**
321 321  
322 -* Distance , Battery & Signal are the value at uplink time.
322 +* Temperature , Humidity , Battery & Signal are the value at uplink time.
323 323  
324 -* Json entry 1 ~~ 8 are the last 1 ~~ 8 sampling data as specify by (% style="color:#037691" %)**AT+NOUD=8 ** (%%)Command. Each entry includes (from left to right): Distance, Sampling time.
324 +* Json entry 1 ~~ 8 are the last 1 ~~ 8 sampling data as specify by (% style="color:#037691" %)**AT+NOUD=8 ** (%%)Command. Each entry includes (from left to right): Temperature, Humidity, Sampling time.
325 325  
326 326  === 2.2.2 HEX format Payload(Type~=0) ===
327 327  
... ... @@ -328,28 +328,23 @@
328 328  
329 329  This is the HEX Format. As below:
330 330  
331 -(% style="color:#4472c4" %)**f8662070583784430b640dda15010003a4650abc400000650ab8180000650ab4940000650ab10f0000650aad8b0000650aaa070000650aa6840000650aa3000000650a9308**
331 +(% style="color:#4472c4" %)**f86620705346276200640cba16010000000011011801e864d49c2d011a01e364d49925011901eb64d49871011901e564d497bd011a01e664d49709011901e964d49655011a01e864d495a1011a01e864d494ed011801e864d49439**
332 332  
333 -[[image:image-20230920172200-1.png||height="191" width="1047"]]
333 +[[image:1692424009971-458.png]]
334 334  
335 335  
336 -If we use the MQTT client to subscribe to this MQTT topic, we can see the following information when the NB sensor uplink data.
337 -
338 -[[image:image-20230920173352-2.png||height="636" width="919"]]
339 -
340 -
341 341  (% style="color:blue" %)**Version:**
342 342  
343 343  These bytes include the hardware and software version.
344 344  
345 -(% style="color:#037691" %)**Higher byte:**(%%) Specify Sensor Model: 0x0b for DDS45-NB
340 +(% style="color:#037691" %)**Higher byte:**(%%) Specify Sensor Model: 0x00 for DDS20-NB
346 346  
347 -(% style="color:#037691" %)**Lower byte:**(%%) Specify the software version: 0x64=100, means firmware version 1.0.0
342 +(% style="color:#037691" %)**Lower byte:**(%%) Specify the software version: 0x64=100, means firmware version 100
348 348  
349 349  
350 350  (% style="color:blue" %)**BAT (Battery Info):**
351 351  
352 -Ex1: 0x0dda = 3546mV
347 +Ex1: 0x0CBA = 3258mV
353 353  
354 354  
355 355  (% style="color:blue" %)**Signal Strength:**
... ... @@ -356,7 +356,7 @@
356 356  
357 357  NB-IoT Network signal Strength.
358 358  
359 -**Ex1: 0x15 = 21**
354 +**Ex1: 0x16 = 22**
360 360  
361 361  **0**  -113dBm or less
362 362  
... ... @@ -369,18 +369,13 @@
369 369  **99**    Not known or not detectable
370 370  
371 371  
372 -(% style="color:blue" %)**Distance:  **
367 +(% style="color:blue" %)**TimeStamp:   **
373 373  
374 -Ex1: 0x03a4 = 932 mm
369 +Unit TimeStamp Example: 64d49439(H) = 1691653177(D)
375 375  
371 +Put the decimal value into this link(https:~/~/www.epochconverter.com/) to get the time.
376 376  
377 -(% style="color:blue" %)**Timestamp:   **
378 378  
379 -Unit Timestamp Example: 650abc40(H) = 1695202368(D)
380 -
381 -Put the decimal value into this link([[https:~~/~~/www.epochconverter.com)>>https://www.epochconverter.com]]) to get the time.
382 -
383 -
384 384  === 2.2.3 ThingsBoard Payload(Type~=3) ===
385 385  
386 386  
... ... @@ -392,51 +392,42 @@
392 392  === 2.2.4 ThingSpeak Payload(Type~=1) ===
393 393  
394 394  
395 -This payload meets ThingSpeak platform requirement. It includes only four fields. Form 1~~3 are:
385 +This payload meets ThingSpeak platform requirement. It includes only four fields. Form 1~~4 are:
396 396  
397 -Distance, Battery & Signal. This payload type only valid for ThingsSpeak Platform
387 +Temperature, Humidity, Battery & Signal. This payload type only valid for ThingsSpeak Platform
398 398  
399 399  As below:
400 400  
401 -(% style="color:#4472c4" %)**field1=Distance value&field2=Battery value&field3=Singal value**
391 +(% style="color:#4472c4" %)**field1=27.9&field2=49.9&field3=3.23&field4=28**
402 402  
403 -[[image:image-20230921104741-1.png||height="565" width="826"]]
404 404  
405 -
406 406  == 2.3  ​Uplink Payload ==
407 407  
408 408  
409 409  (((
410 -DDS45-NB will uplink payload via LoRaWAN with below payload format: 
398 +DDS20-NB will uplink payload via LoRaWAN with below payload format: 
411 411  )))
412 412  
413 413  (((
414 -Uplink payload includes in total 21 bytes.
402 +Uplink payload includes in total 8 bytes.
415 415  )))
416 416  
417 417  (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:510px" %)
418 -|=(% style="width: 95px; background-color:#4F81BD;color:white" %)Size(bytes)|=(% style="width: 61px; background-color:#4F81BD;color:white" %)8|=(% style="width: 61px; background-color:#4F81BD;color:white" %)2|=(% style="background-color:#4F81BD;color:white" %)2|=(% style="background-color:#4F81BD;color:white" %)1|=(% style="background-color: rgb(79, 129, 189); color: white; width: 49px;" %)1|=(% style="background-color: rgb(79, 129, 189); color: white; width: 79px;" %)1|=(% style="background-color:#4F81BD;color:white" %)2|=(% style="background-color:#4F81BD;color:white" %)4
419 -|(% style="width:95px" %)Value|(% style="width:61px" %)f+IMEI|(% style="width:61px" %)Ver|(% style="width:61px" %)[[BAT>>||anchor="H2.3.1A0BatteryInfo"]]|(% style="width:61px" %)(((
420 -Singal
406 +|=(% style="width: 95px; background-color:#4F81BD;color:white" %)Size(bytes)|=(% style="width: 61px; background-color:#4F81BD;color:white" %)2|=(% style="background-color:#4F81BD;color:white" %)2|=(% style="background-color:#4F81BD;color:white" %)1|=(% style="background-color:#4F81BD;color:white" %)2|=(% style="background-color:#4F81BD;color:white" %)1
407 +|(% style="width:95px" %)Value|(% style="width:61px" %)[[BAT>>||anchor="H2.3.1A0BatteryInfo"]]|(((
408 +[[Distance>>||anchor="H2.3.2A0Distance"]]
409 +(unit: mm)
410 +)))|[[Digital Interrupt (Optional)>>||anchor="H2.3.3A0InterruptPin"]]|(((
411 +[[Temperature (Optional)>>||anchor="H2.3.4A0DS18B20Temperaturesensor"]]
412 +)))|[[Sensor Flag>>||anchor="H2.3.5A0SensorFlag"]]
421 421  
422 -Strength
423 -)))|(% style="width:49px" %)Mod|(% style="width:79px" %)[[Digital Interrupt >>||anchor="H2.3.2A0Interrupt"]]|(% style="width:61px" %)[[Distance>>||anchor="H2.3.3A0Distance"]](unit: mm)|(% style="width:61px" %)(((
424 -Timestamp
414 +[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/DDS20-LB_LoRaWAN_Ultrasonic_Liquid_Level_Sensor_User_Manual/WebHome/%E5%BE%AE%E4%BF%A1%E6%88%AA%E5%9B%BE_20230702135733.png?width=964&height=215&rev=1.1||alt="微信截图_20230702135733.png"]]
425 425  
426 -
427 -)))
428 428  
429 -If the cache upload mechanism is turned on, you will receive the payload shown in the figure below.
430 -
431 -(% border="1" cellspacing="5" style="background-color:#f2f2f2; width:512px" %)
432 -|(% style="width:115px" %)**Frame header**|(% style="width:118px" %)**Frame data(1)**|(% style="width:116px" %)**Frame data(2)**|(% style="width:39px" %)**F…**|(% style="width:117px" %)**Frame data(X)**
433 -
434 -=== ===
435 -
436 436  === 2.3.1  Battery Info ===
437 437  
438 438  
439 -Check the battery voltage for DDS45-NB.
420 +Check the battery voltage for DDS20-NB.
440 440  
441 441  Ex1: 0x0B45 = 2885mV
442 442  
... ... @@ -443,9 +443,26 @@
443 443  Ex2: 0x0B49 = 2889mV
444 444  
445 445  
446 -=== 2.3.2  Interrupt ===
427 +=== 2.3.2  Distance ===
447 447  
448 448  
430 +(((
431 +Get the distance. Flat object range 20mm - 2000mm.
432 +)))
433 +
434 +(((
435 +For example, if the data you get from the register is **0x06 0x05**, the distance between the sensor and the measured object is(% style="color:#4472c4" %)** **
436 +
437 +(% style="color:blue" %)**0605(H) = 1541 (D) = 1541 mm.**
438 +)))
439 +
440 +* If the sensor value is 0x0000, it means system doesn't detect ultrasonic sensor.
441 +
442 +* If the sensor value lower than 0x0014 (20mm), the sensor value will be invalid.
443 +
444 +=== 2.3.3  Interrupt Pin ===
445 +
446 +
449 449  This data field shows if this packet is generated by interrupt or not.
450 450  
451 451  **Example:**
... ... @@ -455,24 +455,28 @@
455 455  0x01: Interrupt Uplink Packet.
456 456  
457 457  
458 -=== 2.3.3  Distance ===
456 +=== 2.3.4  DS18B20 Temperature sensor ===
459 459  
460 460  
461 -(((
462 -Get the distance. Flat object range 30mm - 4500mm.
463 -)))
459 +This is optional, user can connect external DS18B20 sensor to the +3.3v, 1-wire and GND pin . and this field will report temperature.
464 464  
465 -(((
466 -For example, if the data you get from the register is **0x0B 0x05**, the distance between the sensor and the measured object is(% style="color:#4472c4" %)** **
461 +**Example**:
467 467  
468 -(% style="color:blue" %)**0B05(H) = 2821 (D) = 2821 mm.**
469 -)))
463 +If payload is: 0105H:  (0105 & FC00 == 0), temp = 0105H /10 = 26.1 degree
470 470  
471 -* If the sensor value is 0x0000, it means system doesn't detect ultrasonic sensor.
465 +If payload is: FF3FH :  (FF3F & FC00 == 1) , temp = (FF3FH - 65536)/10 = -19.3 degrees.
472 472  
473 -* If the sensor value lower than 0x001E (30mm), the sensor value will be 0x00.
474 474  
468 +=== 2.3.5  Sensor Flag ===
469 +
470 +
475 475  (((
472 +0x01: Detect Ultrasonic Sensor
473 +)))
474 +
475 +(((
476 +0x00: No Ultrasonic Sensor
477 +
476 476  
477 477  )))
478 478  
... ... @@ -491,7 +491,7 @@
491 491  == 2.5 Multi-Samplings and One uplink ==
492 492  
493 493  
494 -To save battery life, DDS45-NB will sample Distance data every 15 minutes and send one uplink every 2 hours. So each uplink it will include 8 stored data + 1 real-time data. They are defined by:
496 +To save battery life, DDS20-NB will sample temperature & humidity data every 15 minutes and send one uplink every 2 hours. So each uplink it will include 8 stored data + 1 real-time data. They are defined by:
495 495  
496 496  * (% style="color:#037691" %)**AT+TR=900**   (%%) ~/~/ The unit is seconds, and the default is to record data once every 900 seconds (15 minutes, the minimum can be set to 180 seconds)
497 497  
... ... @@ -505,7 +505,7 @@
505 505  == 2.6 Trggier an uplink by external interrupt ==
506 506  
507 507  
508 -DDS45-NB has an external trigger interrupt function. Users can use the PB15 pin to trigger the upload of data packets.
510 +DDS20-NB has an external trigger interrupt function. Users can use the PB15 pin to trigger the upload of data packets.
509 509  
510 510  (% style="color:blue" %)**AT command:**
511 511  
... ... @@ -519,12 +519,12 @@
519 519  
520 520  * (% style="color:#037691" %)**AT+INTMOD=3  **(%%) ~/~/ Trigger by rising edge
521 521  
522 -= 3. Configure DDS45-NB =
524 += 3. Configure DDS20-NB =
523 523  
524 524  == 3.1 Configure Methods ==
525 525  
526 526  
527 -DDS45-NB supports below configure method:
529 +DDS20-NB supports below configure method:
528 528  
529 529  * AT Command via Bluetooth Connection (**Recommended**): [[BLE Configure Instruction>>http://wiki.dragino.com/xwiki/bin/view/Main/BLE%20Bluetooth%20Remote%20Configure/]].
530 530  
... ... @@ -613,7 +613,7 @@
613 613  = 4. Battery & Power Consumption =
614 614  
615 615  
616 -DDS45-NB use ER26500 + SPC1520 battery pack. See below link for detail information about the battery info and how to replace.
618 +DDS20-NB use ER26500 + SPC1520 battery pack. See below link for detail information about the battery info and how to replace.
617 617  
618 618  [[**Battery Info & Power Consumption Analyze**>>http://wiki.dragino.com/xwiki/bin/view/Main/How%20to%20calculate%20the%20battery%20life%20of%20Dragino%20sensors%3F/]] .
619 619  
... ... @@ -627,7 +627,7 @@
627 627  
628 628  * Fix bugs.
629 629  
630 -Firmware and changelog can be downloaded from : **[[Firmware download link>>https://www.dropbox.com/sh/l0bszumyrmil3yv/AAAg8LYGeAgDsD_ycCnweD72a?dl=0]]**
632 +Firmware and changelog can be downloaded from : **[[Firmware download link>>https://www.dropbox.com/sh/nyzeu0lf0amcaek/AAC6UZrqyTcAyJgXOH7l9F9Ka?dl=0]]**
631 631  
632 632  Methods to Update Firmware:
633 633  
... ... @@ -645,49 +645,23 @@
645 645  [[See BC660K-GL AT Command set>>url:https://www.dropbox.com/sh/5f6ssda5fum8rvs/AABT68l8ZzWOvZ5eg2qwOoFda?dl=0]]
646 646  
647 647  
648 -== 6.2 Can I use DDS45-NB in condensation environment? ==
650 += 7.  Trouble Shooting =
649 649  
652 +== 7.1  Why i always see 0x0000 or 0 for the distance value? ==
650 650  
651 -DDS45-NB is not suitable to be used in condensation environment. Condensation on the DDS45-NB probe will affect the reading and always got 0.
652 652  
655 +(((
656 +DDS20-NB has a strict [[**installation requirement**>>||anchor="H1.5A0InstallDDS20-NB"]]. Please make sure the installation method exactly follows up with the installation requirement. Otherwise, the reading might be always 0x00.
653 653  
654 -= 7. Trouble Shooting =
658 +If you have followed the instruction requirement exactly but still see the 0x00 reading issue, please. please double-check the decoder, you can check the raw payload to verify.
655 655  
656 -== 7.1 Why does the sensor reading show 0 or "No sensor" ==
660 +
661 +)))
657 657  
658 -
659 -~1. The measurement object is very close to the sensor, but in the blind spot of the sensor.
660 -
661 -2. Sensor wiring is disconnected
662 -
663 -3. Not using the correct decoder
664 -
665 -
666 -== 7.2 Abnormal readings The gap between multiple readings is too large or the gap between the readings and the actual value is too large ==
667 -
668 -
669 -1) Please check if there is something on the probe affecting its measurement (condensed water, volatile oil, etc.)
670 -
671 -2) Does it change with temperature, temperature will affect its measurement
672 -
673 -3) If abnormal data occurs, you can turn on DEBUG mode, Please use downlink or AT COMMAN to enter DEBUG mode.
674 -
675 -downlink command: (% style="color:blue" %)**F1 01**(%%), AT command: (% style="color:blue" %)**AT+DDEBUG=1**
676 -
677 -4) After entering the debug mode, it will send 20 pieces of data at a time, and you can send its uplink to us for analysis
678 -
679 -[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LDDS75%20-%20LoRaWAN%20Distance%20Detection%20Sensor%20User%20Manual/WebHome/image-20230113135125-2.png?width=1057&height=136&rev=1.1||alt="image-20230113135125-2.png"]]
680 -
681 -
682 -Its original payload will be longer than other data. Even though it is being parsed, it can be seen that it is abnormal data.
683 -
684 -Please send the data to us for check.
685 -
686 -
687 687  = 8. Order Info =
688 688  
689 689  
690 -Part Number: (% style="color:blue" %)**DDS45-NB-XX**
666 +Part Number: (% style="color:blue" %)**DDS20-NB-XX**
691 691  
692 692  (% style="color:red" %)**XX**(%%):
693 693  
... ... @@ -703,7 +703,7 @@
703 703  
704 704  (% style="color:#037691" %)**Package Includes**:
705 705  
706 -* DDS45-NB NB-IoT Distance Detection sensor x 1
682 +* DDS20-NB NB-IoT Ultrasonic liquid level sensor x 1
707 707  
708 708  * External antenna x 1
709 709  
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