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Last modified by Mengting Qiu on 2024/09/05 17:35
From version 100.4
edited by Xiaoling
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To version 86.6
edited by Xiaoling
on 2023/09/12 10:55
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Summary

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Title
... ... @@ -1,1 +1,1 @@
1 -SW3L-NB -- NB-IoT Flow Sensor User Manual
1 +DDS45-NB -- NB-IoT Distance Detection Sensor User Manual
Content
... ... @@ -1,5 +1,5 @@
1 1  (% style="text-align:center" %)
2 -[[image:image-20231010090810-1.png||height="518" width="839"]]
2 +[[image:image-20230912085600-1.png||height="519" width="731"]]
3 3  
4 4  
5 5  
... ... @@ -8,6 +8,7 @@
8 8  
9 9  
10 10  
11 +
11 11  **Table of Contents:**
12 12  
13 13  {{toc/}}
... ... @@ -19,23 +19,21 @@
19 19  
20 20  = 1. Introduction =
21 21  
22 -== 1.1 What is SW3L-NB NB-IoT Flow Sensor ==
23 +== 1.1 What is DDS45-NB NB-IoT Distance Detection Sensor ==
23 23  
24 24  
25 -The Dragino SW3L-NB is a (% style="color:blue" %)**NB-IoT Flow Sensor**(%%). It detects water flow volume and uplink to IoT server via NB-IoT network. User can use this to (% style="color:blue" %)**monitor the water usage for buildings**.
26 +The Dragino DDS45-NB is a (% style="color:blue" %)** NB-IoT Distance Detection Sensor**(%%) for Internet of Things solution. It is used to measure the distance between the sensor and a flat object. The distance detection sensor is a module that uses (% style="color:blue" %)** ultrasonic sensing technology**(%%) for distance measurement, and (% style="color:blue" %)** temperature compensation**(%%) is performed internally to improve the reliability of data. The DDS45-NB can be applied to scenarios such as horizontal distance measurement, liquid level measurement, parking management system, object proximity and presence detection, intelligent trash can management system, robot obstacle avoidance, automatic control, sewer, bottom water level monitoring, etc.
26 26  
27 -The SW3L-NB will send water flow volume every 20 minutes. It can also detect the (% style="color:blue" %)**water flow status and send Alarm**(%%), to avoid the waste for water usage such as broken toilet case.
28 +It detects the distance (% style="color:blue" %)** between the measured object and the sensor**(%%), and and send IoT platform via NB-IoT network.
28 28  
29 -SW3L-NB is designed for both indoor and outdoor use. It has a weatherproof enclosure and industrial level battery to (% style="color:blue" %)**work in low to high temperatures**.
30 +DDS45-NB supports different uplink methods including (% style="color:blue" %)**MQTT, MQTTs, UDP & TCP**(%%) for different application requirement, and support uplinks to various IoT Servers.
30 30  
31 -SW3L-NB supports different uplink methods including (% style="color:blue" %)**MQTT, MQTTs, UDP & TCP**(%%) for different application requirement, and support uplinks to various IoT Servers.
32 +DDS45-NB (% style="color:blue" %)**supports BLE configure **(%%)and(% style="color:blue" %)** OTA update**(%%) which make user easy to use.
32 32  
33 -SW3L-NB (% style="color:blue" %)**supports BLE configure **(%%)and(% style="color:blue" %)** OTA update**(%%) which make user easy to use.
34 +DDS45-NB is powered by (% style="color:blue" %)**8500mAh Li-SOCI2 battery**(%%), it is designed for long-term use up to severa years.
34 34  
35 -SW3L-NB is powered by (% style="color:blue" %)**8500mAh Li-SOCI2 battery**(%%), it is designed for long-term use up to several years.
36 +DDS45-NB has optional built-in SIM card and default IoT server connection version. Which makes it works with simple configuration.
36 36  
37 -SW3L-NB has optional built-in SIM card and default IoT server connection version. Which makes it works with simple configuration.
38 -
39 39  [[image:image-20230912102813-2.png||height="320" width="923"]]
40 40  
41 41  
... ... @@ -149,12 +149,13 @@
149 149  * Sewer
150 150  * Bottom water level monitoring
151 151  
151 +
152 152  == 1.7 Sleep mode and working mode ==
153 153  
154 154  
155 -(% 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.
155 +(% 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.
156 156  
157 -(% 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.
157 +(% 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.
158 158  
159 159  
160 160  == 1.8 Button & LEDs ==
... ... @@ -179,7 +179,7 @@
179 179  == 1.9 BLE connection ==
180 180  
181 181  
182 -DDS45-NB support BLE remote configure and firmware update.
182 +DDS20-NB support BLE remote configure and firmware update.
183 183  
184 184  
185 185  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:
... ... @@ -250,7 +250,7 @@
250 250  There are two version: (% style="color:blue" %)**-GE**(%%) and (% style="color:blue" %)**-1D**(%%) version of DDS45-NB.
251 251  
252 252  
253 -(% 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.
253 +(% 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.
254 254  
255 255  * 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]].
256 256  
... ... @@ -280,13 +280,13 @@
280 280  [[image:image-20230819113244-11.png||height="141" width="367"]]
281 281  )))|(% style="width:170px" %)
282 282  
283 -(% 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]].
283 +(% 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]].
284 284  
285 285  
286 286  == 2.2 ​Payload Types ==
287 287  
288 288  
289 -To meet different server requirement, DDS45-NB supports different payload type.
289 +To meet different server requirement, DDS20-NB supports different payload type.
290 290  
291 291  **Includes:**
292 292  
... ... @@ -312,17 +312,14 @@
312 312  
313 313  This is the General Json Format. As below:
314 314  
315 -(% 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}}**
315 +(% 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}}**
316 316  
317 317  
318 -[[image:image-20230920175015-3.png||height="613" width="890"]]
319 -
320 -
321 321  (% style="color:red" %)**Notice, from above payload:**
322 322  
323 -* Distance , Battery & Signal are the value at uplink time.
320 +* Temperature , Humidity , Battery & Signal are the value at uplink time.
324 324  
325 -* 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.
322 +* 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.
326 326  
327 327  === 2.2.2 HEX format Payload(Type~=0) ===
328 328  
... ... @@ -329,28 +329,23 @@
329 329  
330 330  This is the HEX Format. As below:
331 331  
332 -(% style="color:#4472c4" %)**f8662070583784430b640dda15010003a4650abc400000650ab8180000650ab4940000650ab10f0000650aad8b0000650aaa070000650aa6840000650aa3000000650a9308**
329 +(% style="color:#4472c4" %)**f86620705346276200640cba16010000000011011801e864d49c2d011a01e364d49925011901eb64d49871011901e564d497bd011a01e664d49709011901e964d49655011a01e864d495a1011a01e864d494ed011801e864d49439**
333 333  
334 -[[image:image-20230920172200-1.png||height="191" width="1047"]]
331 +[[image:1692424009971-458.png]]
335 335  
336 336  
337 -If we use the MQTT client to subscribe to this MQTT topic, we can see the following information when the NB sensor uplink data.
338 -
339 -[[image:image-20230920173352-2.png||height="636" width="919"]]
340 -
341 -
342 342  (% style="color:blue" %)**Version:**
343 343  
344 344  These bytes include the hardware and software version.
345 345  
346 -(% style="color:#037691" %)**Higher byte:**(%%) Specify Sensor Model: 0x0b for DDS45-NB
338 +(% style="color:#037691" %)**Higher byte:**(%%) Specify Sensor Model: 0x00 for DDS20-NB
347 347  
348 -(% style="color:#037691" %)**Lower byte:**(%%) Specify the software version: 0x64=100, means firmware version 1.0.0
340 +(% style="color:#037691" %)**Lower byte:**(%%) Specify the software version: 0x64=100, means firmware version 100
349 349  
350 350  
351 351  (% style="color:blue" %)**BAT (Battery Info):**
352 352  
353 -Ex1: 0x0dda = 3546mV
345 +Ex1: 0x0CBA = 3258mV
354 354  
355 355  
356 356  (% style="color:blue" %)**Signal Strength:**
... ... @@ -357,7 +357,7 @@
357 357  
358 358  NB-IoT Network signal Strength.
359 359  
360 -**Ex1: 0x15 = 21**
352 +**Ex1: 0x16 = 22**
361 361  
362 362  **0**  -113dBm or less
363 363  
... ... @@ -370,78 +370,60 @@
370 370  **99**    Not known or not detectable
371 371  
372 372  
373 -(% style="color:blue" %)**Distance:  **
365 +(% style="color:blue" %)**TimeStamp:   **
374 374  
375 -Ex1: 0x03a4 = 932 mm
367 +Unit TimeStamp Example: 64d49439(H) = 1691653177(D)
376 376  
369 +Put the decimal value into this link(https:~/~/www.epochconverter.com/) to get the time.
377 377  
378 -(% style="color:blue" %)**Timestamp:   **
379 379  
380 -Unit Timestamp Example: 650abc40(H) = 1695202368(D)
381 -
382 -Put the decimal value into this link([[https:~~/~~/www.epochconverter.com)>>https://www.epochconverter.com]]) to get the time.
383 -
384 -
385 385  === 2.2.3 ThingsBoard Payload(Type~=3) ===
386 386  
387 387  
388 388  Type3 payload special design for ThingsBoard, it will also configure other default server to ThingsBoard.
389 389  
390 -(% style="color:#4472c4" %)** {"IMEI": "866207058378443","Model": "DDS45-NB","distance": 502,"battery": 3.57,"signal": 23}**
377 +(% style="color:#4472c4" %)**{"IMEI":866207053462762,"temperature":29.2,"humidity":54.2,"battery":3.27,"signal":24}**
391 391  
392 -[[image:image-20230922094043-2.png||height="558" width="851"]]
393 393  
394 -
395 -=== ===
396 -
397 397  === 2.2.4 ThingSpeak Payload(Type~=1) ===
398 398  
399 399  
400 -This payload meets ThingSpeak platform requirement. It includes only four fields. Form 1~~3 are:
383 +This payload meets ThingSpeak platform requirement. It includes only four fields. Form 1~~4 are:
401 401  
402 -Distance, Battery & Signal. This payload type only valid for ThingsSpeak Platform
385 +Temperature, Humidity, Battery & Signal. This payload type only valid for ThingsSpeak Platform
403 403  
404 404  As below:
405 405  
406 -(% style="color:#4472c4" %)**field1=Distance value&field2=Battery value&field3=Singal value**
389 +(% style="color:#4472c4" %)**field1=27.9&field2=49.9&field3=3.23&field4=28**
407 407  
408 -[[image:image-20230921104741-1.png||height="565" width="826"]]
409 409  
410 -
411 411  == 2.3  ​Uplink Payload ==
412 412  
413 413  
414 414  (((
415 -DDS45-NB will uplink payload via LoRaWAN with below payload format: 
396 +DDS20-NB will uplink payload via LoRaWAN with below payload format: 
416 416  )))
417 417  
418 418  (((
419 -Uplink payload includes in total 21 bytes.
400 +Uplink payload includes in total 8 bytes.
420 420  )))
421 421  
422 422  (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:510px" %)
423 -|=(% 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
424 -|(% style="width:95px" %)Value|(% style="width:61px" %)f+IMEI|(% style="width:61px" %)Ver|(% style="width:61px" %)[[BAT>>||anchor="H2.3.1A0BatteryInfo"]]|(% style="width:61px" %)(((
425 -Singal
404 +|=(% 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
405 +|(% style="width:95px" %)Value|(% style="width:61px" %)[[BAT>>||anchor="H2.3.1A0BatteryInfo"]]|(((
406 +[[Distance>>||anchor="H2.3.2A0Distance"]]
407 +(unit: mm)
408 +)))|[[Digital Interrupt (Optional)>>||anchor="H2.3.3A0InterruptPin"]]|(((
409 +[[Temperature (Optional)>>||anchor="H2.3.4A0DS18B20Temperaturesensor"]]
410 +)))|[[Sensor Flag>>||anchor="H2.3.5A0SensorFlag"]]
426 426  
427 -Strength
428 -)))|(% 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" %)(((
429 -Timestamp
412 +[[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"]]
430 430  
431 -
432 -)))
433 433  
434 -If the cache upload mechanism is turned on, you will receive the payload shown in the figure below.
435 -
436 -(% border="1" cellspacing="5" style="background-color:#f2f2f2; width:512px" %)
437 -|(% 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)**
438 -
439 -=== ===
440 -
441 441  === 2.3.1  Battery Info ===
442 442  
443 443  
444 -Check the battery voltage for DDS45-NB.
418 +Check the battery voltage for DDS20-NB.
445 445  
446 446  Ex1: 0x0B45 = 2885mV
447 447  
... ... @@ -448,9 +448,26 @@
448 448  Ex2: 0x0B49 = 2889mV
449 449  
450 450  
451 -=== 2.3.2  Interrupt ===
425 +=== 2.3.2  Distance ===
452 452  
453 453  
428 +(((
429 +Get the distance. Flat object range 20mm - 2000mm.
430 +)))
431 +
432 +(((
433 +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" %)** **
434 +
435 +(% style="color:blue" %)**0605(H) = 1541 (D) = 1541 mm.**
436 +)))
437 +
438 +* If the sensor value is 0x0000, it means system doesn't detect ultrasonic sensor.
439 +
440 +* If the sensor value lower than 0x0014 (20mm), the sensor value will be invalid.
441 +
442 +=== 2.3.3  Interrupt Pin ===
443 +
444 +
454 454  This data field shows if this packet is generated by interrupt or not.
455 455  
456 456  **Example:**
... ... @@ -460,24 +460,28 @@
460 460  0x01: Interrupt Uplink Packet.
461 461  
462 462  
463 -=== 2.3.3  Distance ===
454 +=== 2.3.4  DS18B20 Temperature sensor ===
464 464  
465 465  
466 -(((
467 -Get the distance. Flat object range 30mm - 4500mm.
468 -)))
457 +This is optional, user can connect external DS18B20 sensor to the +3.3v, 1-wire and GND pin . and this field will report temperature.
469 469  
470 -(((
471 -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" %)** **
459 +**Example**:
472 472  
473 -(% style="color:blue" %)**0B05(H) = 2821 (D) = 2821 mm.**
474 -)))
461 +If payload is: 0105H:  (0105 & FC00 == 0), temp = 0105H /10 = 26.1 degree
475 475  
476 -* If the sensor value is 0x0000, it means system doesn't detect ultrasonic sensor.
463 +If payload is: FF3FH :  (FF3F & FC00 == 1) , temp = (FF3FH - 65536)/10 = -19.3 degrees.
477 477  
478 -* If the sensor value lower than 0x001E (30mm), the sensor value will be 0x00.
479 479  
466 +=== 2.3.5  Sensor Flag ===
467 +
468 +
480 480  (((
470 +0x01: Detect Ultrasonic Sensor
471 +)))
472 +
473 +(((
474 +0x00: No Ultrasonic Sensor
475 +
481 481  
482 482  )))
483 483  
... ... @@ -496,7 +496,7 @@
496 496  == 2.5 Multi-Samplings and One uplink ==
497 497  
498 498  
499 -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:
494 +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:
500 500  
501 501  * (% 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)
502 502  
... ... @@ -510,7 +510,7 @@
510 510  == 2.6 Trggier an uplink by external interrupt ==
511 511  
512 512  
513 -DDS45-NB has an external trigger interrupt function. Users can use the PB15 pin to trigger the upload of data packets.
508 +DDS20-NB has an external trigger interrupt function. Users can use the PB15 pin to trigger the upload of data packets.
514 514  
515 515  (% style="color:blue" %)**AT command:**
516 516  
... ... @@ -524,12 +524,12 @@
524 524  
525 525  * (% style="color:#037691" %)**AT+INTMOD=3  **(%%) ~/~/ Trigger by rising edge
526 526  
527 -= 3. Configure DDS45-NB =
522 += 3. Configure DDS20-NB =
528 528  
529 529  == 3.1 Configure Methods ==
530 530  
531 531  
532 -DDS45-NB supports below configure method:
527 +DDS20-NB supports below configure method:
533 533  
534 534  * AT Command via Bluetooth Connection (**Recommended**): [[BLE Configure Instruction>>http://wiki.dragino.com/xwiki/bin/view/Main/BLE%20Bluetooth%20Remote%20Configure/]].
535 535  
... ... @@ -618,7 +618,7 @@
618 618  = 4. Battery & Power Consumption =
619 619  
620 620  
621 -DDS45-NB use ER26500 + SPC1520 battery pack. See below link for detail information about the battery info and how to replace.
616 +DDS20-NB use ER26500 + SPC1520 battery pack. See below link for detail information about the battery info and how to replace.
622 622  
623 623  [[**Battery Info & Power Consumption Analyze**>>http://wiki.dragino.com/xwiki/bin/view/Main/How%20to%20calculate%20the%20battery%20life%20of%20Dragino%20sensors%3F/]] .
624 624  
... ... @@ -632,7 +632,7 @@
632 632  
633 633  * Fix bugs.
634 634  
635 -Firmware and changelog can be downloaded from : **[[Firmware download link>>https://www.dropbox.com/sh/l0bszumyrmil3yv/AAAg8LYGeAgDsD_ycCnweD72a?dl=0]]**
630 +Firmware and changelog can be downloaded from : **[[Firmware download link>>https://www.dropbox.com/sh/nyzeu0lf0amcaek/AAC6UZrqyTcAyJgXOH7l9F9Ka?dl=0]]**
636 636  
637 637  Methods to Update Firmware:
638 638  
... ... @@ -650,49 +650,23 @@
650 650  [[See BC660K-GL AT Command set>>url:https://www.dropbox.com/sh/5f6ssda5fum8rvs/AABT68l8ZzWOvZ5eg2qwOoFda?dl=0]]
651 651  
652 652  
653 -== 6.2 Can I use DDS45-NB in condensation environment? ==
648 += 7.  Trouble Shooting =
654 654  
650 +== 7.1  Why i always see 0x0000 or 0 for the distance value? ==
655 655  
656 -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.
657 657  
653 +(((
654 +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.
658 658  
659 -= 7. Trouble Shooting =
656 +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.
660 660  
661 -== 7.1 Why does the sensor reading show 0 or "No sensor" ==
658 +
659 +)))
662 662  
663 -
664 -~1. The measurement object is very close to the sensor, but in the blind spot of the sensor.
665 -
666 -2. Sensor wiring is disconnected
667 -
668 -3. Not using the correct decoder
669 -
670 -
671 -== 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 ==
672 -
673 -
674 -1) Please check if there is something on the probe affecting its measurement (condensed water, volatile oil, etc.)
675 -
676 -2) Does it change with temperature, temperature will affect its measurement
677 -
678 -3) If abnormal data occurs, you can turn on DEBUG mode, Please use downlink or AT COMMAN to enter DEBUG mode.
679 -
680 -downlink command: (% style="color:blue" %)**F1 01**(%%), AT command: (% style="color:blue" %)**AT+DDEBUG=1**
681 -
682 -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
683 -
684 -[[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"]]
685 -
686 -
687 -Its original payload will be longer than other data. Even though it is being parsed, it can be seen that it is abnormal data.
688 -
689 -Please send the data to us for check.
690 -
691 -
692 692  = 8. Order Info =
693 693  
694 694  
695 -Part Number: (% style="color:blue" %)**DDS45-NB-XX**
664 +Part Number: (% style="color:blue" %)**DDS20-NB-XX**
696 696  
697 697  (% style="color:red" %)**XX**(%%):
698 698  
... ... @@ -708,7 +708,7 @@
708 708  
709 709  (% style="color:#037691" %)**Package Includes**:
710 710  
711 -* DDS45-NB NB-IoT Distance Detection sensor x 1
680 +* DDS20-NB NB-IoT Ultrasonic liquid level sensor x 1
712 712  
713 713  * External antenna x 1
714 714  
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