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edited by Xiaoling
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To version 84.5
edited by Xiaoling
on 2023/09/11 14:34
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... ... @@ -16,19 +16,19 @@
16 16  == 1.1 What is DDS20-NB NB-IoT Ultrasonic liquid level Sensor ==
17 17  
18 18  
19 -The Dragino DDS20-NB is a (% style="color:blue" %)**NB-IoT Ultrasonic liquid level sensor**(%%) for Internet of Things solution. It uses (% style="color:blue" %)**none-contact method **(%%)to measure the (% style="color:blue" %)**height of liquid**(%%) in a container without opening the container, and send IoT platform via NB-IoT network.
19 +The Dragino DDS20-NB is a **NB-IoT Ultrasonic liquid level sensor** for Internet of Things solution. It uses **none-contact method **to measure the **height of liquid** in a container without opening the container, and send IoT platform via NB-IoT network.
20 20  
21 21  The DDS20-NB sensor is installed directly below the container to detect the height of the liquid level. User doesn't need to open a hole on the container to be tested. The none-contact measurement makes the measurement safety, easier and possible for some strict situation. 
22 22  
23 -DDS20-NB uses (% style="color:blue" %)**ultrasonic sensing technology**(%%) for distance measurement. DDS20-NB is of high accuracy to measure various liquid such as: (% style="color:blue" %)**toxic substances**, **strong acids**, **strong alkalis**(%%) and (% style="color:blue" %)**various pure liquids**(%%) in high-temperature and high-pressure airtight containers.
23 +DDS20-NB uses **ultrasonic sensing technology** for distance measurement. DDS20-NB is of high accuracy to measure various liquid such as: **toxic substances**, **strong acids**, **strong alkalis** and **various pure liquids** in high-temperature and high-pressure airtight containers.
24 24  
25 -DDS20-NB supports different uplink methods including (% style="color:blue" %)**MQTT, MQTTs, UDP & TCP**(%%) for different application requirement, and support uplinks to various IoT Servers.
25 +PS-NB-NA supports different uplink methods including **MQTT, MQTTs, UDP & TCP** for different application requirement, and support uplinks to various IoT Servers.
26 26  
27 -DDS20-NB (% style="color:blue" %)**supports BLE configure **(%%)and(% style="color:blue" %)** OTA update**(%%) which make user easy to use.
27 +PS-NB-NA **supports BLE configure **and** OTA update** which make user easy to use.
28 28  
29 -DDS20-NB is powered by (% style="color:blue" %)**8500mAh Li-SOCI2 battery**(%%), it is designed for long-term use up to severa years.
29 +PS-NB-NA is powered by **8500mAh Li-SOCI2 battery**, it is designed for long-term use up to severa years.
30 30  
31 -DDS20-NB has optional built-in SIM card and default IoT server connection version. Which makes it works with simple configuration.
31 +PS-NB-NA has optional built-in SIM card and default IoT server connection version. Which makes it works with simple configuration.
32 32  
33 33  
34 34  [[image:image-20230911140426-2.png||height="320" width="951"]]
... ... @@ -192,7 +192,7 @@
192 192  Reset DDS20-NB and see if the BLUE LED is slowly blinking.
193 193  )))
194 194  
195 -[[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/image-20230809172509-1.png?rev=1.1||alt="image-20230809172509-1.png"]]
195 +[[image:image-20230809172509-1.png]]
196 196  
197 197  (((
198 198  (% style="color:red" %)**Note :**(% style="color:red; display:none" %)** **
... ... @@ -212,8 +212,6 @@
212 212  
213 213  * Smart liquefied gas solution
214 214  
215 -
216 -
217 217  == 1.7 Precautions ==
218 218  
219 219  
... ... @@ -254,8 +254,6 @@
254 254  )))
255 255  |(% 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.
256 256  
257 -
258 -
259 259  == 1.10 BLE connection ==
260 260  
261 261  
... ... @@ -299,40 +299,23 @@
299 299  (% style="display:none" %)
300 300  
301 301  
302 -== 1.12 Mechanical ==
298 += 2. Use S31-NB to communicate with IoT Server =
303 303  
304 -
305 -[[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"]]
306 -
307 -[[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"]]
308 -
309 -[[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/1675143909447-639.png?rev=1.1||alt="1675143909447-639.png"]]
310 -
311 -
312 -(% style="color:blue" %)**Probe Mechanical:**
313 -
314 -[[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"]]
315 -
316 -[[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"]]
317 -
318 -
319 -= 2. Use DDS20-NB to communicate with IoT Server =
320 -
321 321  == 2.1 Send data to IoT server via NB-IoT network ==
322 322  
323 323  
324 -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.
303 +The S31-NB is equipped with a NB-IoT module, the pre-loaded firmware in S31-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 S31-NB.
325 325  
326 326  
327 327  Below shows the network structure:
328 328  
329 -[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/DDS20-NB_NB-IoT_Ultrasonic_Liquid_Level_Sensor_User_Manual/WebHome/image-20230911140426-2.png?width=951&height=320&rev=1.1||alt="image-20230911140426-2.png"]]
308 +[[image:1692415924540-357.png]]
330 330  
331 331  
332 -There are two version: (% style="color:blue" %)**-GE**(%%) and (% style="color:blue" %)**-1D**(%%) version of DDS20-NB.
311 +There are two version: (% style="color:blue" %)**-GE**(%%) and (% style="color:blue" %)**-1D**(%%) version of S31-NB.
333 333  
334 334  
335 -(% 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.
314 +(% 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 S31-NB send data to IoT server.
336 336  
337 337  * 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]].
338 338  
... ... @@ -362,13 +362,13 @@
362 362  [[image:image-20230819113244-11.png||height="141" width="367"]]
363 363  )))|(% style="width:170px" %)
364 364  
365 -(% 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]].
344 +(% 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 S31-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]].
366 366  
367 367  
368 368  == 2.2 ​Payload Types ==
369 369  
370 370  
371 -To meet different server requirement, DDS20-NB supports different payload type.
350 +To meet different server requirement, S31-NB supports different payload type.
372 372  
373 373  **Includes:**
374 374  
... ... @@ -394,7 +394,7 @@
394 394  
395 395  This is the General Json Format. As below:
396 396  
397 -(% 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}}**
376 +(% style="color:#4472c4" %)**{"IMEI":866207053462762,"temperature":29.2,"humidity":54.2,"battery":3.27,"signal":24,"Model":S31x-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}}**
398 398  
399 399  
400 400  (% style="color:red" %)**Notice, from above payload:**
... ... @@ -403,8 +403,6 @@
403 403  
404 404  * 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.
405 405  
406 -
407 -
408 408  === 2.2.2 HEX format Payload(Type~=0) ===
409 409  
410 410  
... ... @@ -419,7 +419,7 @@
419 419  
420 420  These bytes include the hardware and software version.
421 421  
422 -(% style="color:#037691" %)**Higher byte:**(%%) Specify Sensor Model: 0x00 for DDS20-NB
399 +(% style="color:#037691" %)**Higher byte:**(%%) Specify Sensor Model: 0x00 for S31B-NB & S31-NB
423 423  
424 424  (% style="color:#037691" %)**Lower byte:**(%%) Specify the software version: 0x64=100, means firmware version 100
425 425  
... ... @@ -446,6 +446,20 @@
446 446  **99**    Not known or not detectable
447 447  
448 448  
426 +(% style="color:blue" %)**Temperature: **
427 +
428 +If payload is: 0105H:  (0105 & 8000 == 0), temp = 0105H /10 = 26.1 degree
429 +
430 +If payload is: FF3FH :  (FF3F & 8000 == 1) , temp = (FF3FH - 65536)/10 = -19.3 degrees.
431 +
432 +(FF3F & 8000: Judge whether the highest bit is 1, when the highest bit is 1, it is negative)
433 +
434 +
435 +(% style="color:blue" %)**Humidity:   **
436 +
437 +Read:0295(H)=661(D)    Value:  661 / 10=66.1, So 66.1%
438 +
439 +
449 449  (% style="color:blue" %)**TimeStamp:   **
450 450  
451 451  Unit TimeStamp Example: 64d49439(H) = 1691653177(D)
... ... @@ -473,125 +473,60 @@
473 473  (% style="color:#4472c4" %)**field1=27.9&field2=49.9&field3=3.23&field4=28**
474 474  
475 475  
476 -== 2.3  ​Uplink Payload ==
467 +== 2.3 Test Uplink and Change Update Interval ==
477 477  
478 478  
479 -(((
480 -DDS20-NB will uplink payload via LoRaWAN with below payload format: 
481 -)))
470 +By default, Sensor will send uplinks (% style="color:blue" %)**every 2 hours**(%%) & AT+NOUD=8
482 482  
483 -(((
484 -Uplink payload includes in total 8 bytes.
485 -)))
472 +User can use below commands to change the (% style="color:blue" %)**uplink interval**.
486 486  
487 -(% border="1" cellspacing="5" style="background-color:#f2f2f2; width:510px" %)
488 -|=(% 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
489 -|(% style="width:95px" %)Value|(% style="width:61px" %)[[BAT>>||anchor="H2.3.1A0BatteryInfo"]]|(((
490 -[[Distance>>||anchor="H2.3.2A0Distance"]]
491 -(unit: mm)
492 -)))|[[Digital Interrupt (Optional)>>||anchor="H2.3.3A0InterruptPin"]]|(((
493 -[[Temperature (Optional)>>||anchor="H2.3.4A0DS18B20Temperaturesensor"]]
494 -)))|[[Sensor Flag>>||anchor="H2.3.5A0SensorFlag"]]
474 +(% style="color:#037691" %)**AT+TDC=600 ** (%%) ~/~/ Set Update Interval to 600s
495 495  
496 -[[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"]]
476 +User can also push the button for more than 1 seconds to activate an uplink.
497 497  
498 498  
499 -=== 2.3.1  Battery Info ===
479 +== 2.4 Multi-Samplings and One uplink ==
500 500  
501 501  
502 -Check the battery voltage for DDS20-NB.
482 +To save battery life, S31-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:
503 503  
504 -Ex1: 0x0B45 = 2885mV
484 +* (% 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)
505 505  
506 -Ex2: 0x0B49 = 2889mV
486 +* (% style="color:#037691" %)**AT+NOUD=8**     (%%)~/~/  The device uploads 8 sets of recorded data by default. Up to 32 sets of record data can be uploaded.
507 507  
488 +The diagram below explains the relationship between TR, NOUD, and TDC more clearly:
508 508  
509 -=== 2.3.2  Distance ===
490 +[[image:1692424376354-959.png]]
510 510  
511 511  
512 -(((
513 -Get the distance. Flat object range 20mm - 2000mm.
514 -)))
493 +== 2.5 Humidity and Temperature alarm function ==
515 515  
516 -(((
517 -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" %)** **
518 518  
519 -(% style="color:blue" %)**0605(H) = 1541 (D) = 1541 mm.**
520 -)))
496 +On each sampling define by AT+TR ( default 900s or 15 minutes), when the value exceed the range, it will trigger an Alarm and immediately sends a uplink.
521 521  
522 -* If the sensor value is 0x0000, it means system doesn't detect ultrasonic sensor.
523 523  
524 -* If the sensor value lower than 0x0014 (20mm), the sensor value will be invalid.
499 +(% style="color:blue" %)**AT Commands:**
525 525  
501 +(% style="color:#037691" %)**AT+ SHHUM=min,max**
526 526  
503 +Example: AT+ SHHUM=50,80  ~/~/ Alarm when humidity lower than 50 or higher than 80.
527 527  
528 -=== 2.3.3  Interrupt Pin ===
529 529  
506 +(% style="color:#037691" %)**AT+ SHTEMP=min,max**
530 530  
531 -This data field shows if this packet is generated by interrupt or not.
508 +Example: AT+ SHTEMP=20,30  ~/~/ Alarm when temperature lower than 20 or higher than 30
532 532  
533 -**Example:**
534 534  
535 -0x00: Normal uplink packet.
511 +(% style="color:red" %)**Notice:**
536 536  
537 -0x01: Interrupt Uplink Packet.
513 +* To disable Alarm, user can set min and max to same value , such as (% style="color:#037691" %)**AT+SHTEMP=0,0.**
538 538  
515 +* If user only want to send only min or max, user can set the alarm to a value that device won’t reach. For example: (% style="color:#037691" %)**AT+SHTEMP=-80,0.**
539 539  
540 -=== 2.3.4  DS18B20 Temperature sensor ===
541 -
542 -
543 -This is optional, user can connect external DS18B20 sensor to the +3.3v, 1-wire and GND pin . and this field will report temperature.
544 -
545 -**Example**:
546 -
547 -If payload is: 0105H:  (0105 & FC00 == 0), temp = 0105H /10 = 26.1 degree
548 -
549 -If payload is: FF3FH :  (FF3F & FC00 == 1) , temp = (FF3FH - 65536)/10 = -19.3 degrees.
550 -
551 -
552 -=== 2.3.5  Sensor Flag ===
553 -
554 -
555 -(((
556 -0x01: Detect Ultrasonic Sensor
557 -)))
558 -
559 -(((
560 -0x00: No Ultrasonic Sensor
561 -
562 -
563 -)))
564 -
565 -== 2.4 Test Uplink and Change Update Interval ==
566 -
567 -
568 -By default, Sensor will send uplinks (% style="color:blue" %)**every 2 hours**(%%) & AT+NOUD=8
569 -
570 -User can use below commands to change the (% style="color:blue" %)**uplink interval**.
571 -
572 -(% style="color:#037691" %)**AT+TDC=600 ** (%%) ~/~/ Set Update Interval to 600s
573 -
574 -User can also push the button for more than 1 seconds to activate an uplink.
575 -
576 -
577 -== 2.5 Multi-Samplings and One uplink ==
578 -
579 -
580 -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:
581 -
582 -* (% 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)
583 -
584 -* (% style="color:#037691" %)**AT+NOUD=8**     (%%)~/~/  The device uploads 8 sets of recorded data by default. Up to 32 sets of record data can be uploaded.
585 -
586 -The diagram below explains the relationship between TR, NOUD, and TDC more clearly:
587 -
588 -[[image:1692424376354-959.png]]
589 -
590 -
591 591  == 2.6 Trggier an uplink by external interrupt ==
592 592  
593 593  
594 -DDS20-NB has an external trigger interrupt function. Users can use the PB15 pin to trigger the upload of data packets.
520 +S31-NB has an external trigger interrupt function. Users can use the PB15 pin to trigger the upload of data packets.
595 595  
596 596  (% style="color:blue" %)**AT command:**
597 597  
... ... @@ -605,21 +605,17 @@
605 605  
606 606  * (% style="color:#037691" %)**AT+INTMOD=3  **(%%) ~/~/ Trigger by rising edge
607 607  
534 += 3. Configure S31x-NB =
608 608  
609 -
610 -= 3. Configure DDS20-NB =
611 -
612 612  == 3.1 Configure Methods ==
613 613  
614 614  
615 -DDS20-NB supports below configure method:
539 +S31x-NB supports below configure method:
616 616  
617 617  * AT Command via Bluetooth Connection (**Recommended**): [[BLE Configure Instruction>>http://wiki.dragino.com/xwiki/bin/view/Main/BLE%20Bluetooth%20Remote%20Configure/]].
618 618  
619 619  * AT Command via UART Connection : See [[UART Connection>>http://wiki.dragino.com/xwiki/bin/view/Main/UART%20Access%20for%20LoRa%20ST%20v4%20base%20model/#H2.3UARTConnectionforSN50v3basemotherboard]].
620 620  
621 -
622 -
623 623  == 3.2 AT Commands Set ==
624 624  
625 625  
... ... @@ -703,7 +703,7 @@
703 703  = 4. Battery & Power Consumption =
704 704  
705 705  
706 -DDS20-NB use ER26500 + SPC1520 battery pack. See below link for detail information about the battery info and how to replace.
628 +S31x-NB use ER26500 + SPC1520 battery pack. See below link for detail information about the battery info and how to replace.
707 707  
708 708  [[**Battery Info & Power Consumption Analyze**>>http://wiki.dragino.com/xwiki/bin/view/Main/How%20to%20calculate%20the%20battery%20life%20of%20Dragino%20sensors%3F/]] .
709 709  
... ... @@ -717,7 +717,7 @@
717 717  
718 718  * Fix bugs.
719 719  
720 -Firmware and changelog can be downloaded from : **[[Firmware download link>>https://www.dropbox.com/sh/nyzeu0lf0amcaek/AAC6UZrqyTcAyJgXOH7l9F9Ka?dl=0]]**
642 +Firmware and changelog can be downloaded from : **[[Firmware download link>>https://www.dropbox.com/sh/fhb3uyl4gt6clru/AAAiZVTFcxrfE1JOOyfcgO9ha?dl=0]]**
721 721  
722 722  Methods to Update Firmware:
723 723  
... ... @@ -725,8 +725,6 @@
725 725  
726 726  * Update through UART TTL interface : **[[Instruction>>url:http://wiki.dragino.com/xwiki/bin/view/Main/UART%20Access%20for%20LoRa%20ST%20v4%20base%20model/#H1.LoRaSTv4baseHardware]]**.
727 727  
728 -
729 -
730 730  = 6. FAQ =
731 731  
732 732  == 6.1 How can I access t BC660K-GL AT Commands? ==
... ... @@ -737,24 +737,11 @@
737 737  [[See BC660K-GL AT Command set>>url:https://www.dropbox.com/sh/5f6ssda5fum8rvs/AABT68l8ZzWOvZ5eg2qwOoFda?dl=0]]
738 738  
739 739  
740 -= 7.  Trouble Shooting =
660 += 7. Order Info =
741 741  
742 -== 7.1  Why i always see 0x0000 or 0 for the distance value? ==
743 743  
663 +Part Number: (% style="color:blue" %)**S31-NB-XX  / S31B-NB-XX**
744 744  
745 -(((
746 -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.
747 -
748 -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.
749 -
750 -
751 -)))
752 -
753 -= 8. Order Info =
754 -
755 -
756 -Part Number: (% style="color:blue" %)**DDS20-NB-XX**
757 -
758 758  (% style="color:red" %)**XX**(%%):
759 759  
760 760  * (% style="color:#037691" %)**GE**(%%): General version ( Exclude SIM card)
... ... @@ -764,12 +764,12 @@
764 764  (% style="color:#037691" %)**1NCE SIM Card NB-IoT network coverage**(%%): Austria, Belgium, Bulgaria, Croatia, Czech Republic, Denmark, Finland, Germany, Great Britain, Greece, Hungary, Ireland, Italy, Latvia, Malta, Netherlands, Norway, Puerto Rico, Russia, Slovak , Republic, Slovenia, Spain, Sweden, Switzerland, Taiwan, USA, US Virgin Islands
765 765  
766 766  
767 -= 9. ​Packing Info =
674 += 8. ​Packing Info =
768 768  
769 769  
770 770  (% style="color:#037691" %)**Package Includes**:
771 771  
772 -* DDS20-NB NB-IoT Ultrasonic liquid level sensor x 1
679 +* S31-NB or S31-NB NB-IoT Sensor Node x 1
773 773  
774 774  * External antenna x 1
775 775  
... ... @@ -783,11 +783,9 @@
783 783  
784 784  * Weight / pcs : 180g
785 785  
693 += 9. Support =
786 786  
787 787  
788 -= 10. Support =
789 -
790 -
791 791  * 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.
792 792  
793 793  * 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.cc>>mailto:Support@dragino.cc]].