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Summary

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Title
... ... @@ -1,1 +1,1 @@
1 -DDS45-NB -- NB-IoT Distance Detection Sensor User Manual
1 +DDS20-NB -- NB-IoT Ultrasonic Liquid Level Sensor User Manual
Content
... ... @@ -1,14 +1,7 @@
1 1  (% style="text-align:center" %)
2 -[[image:image-20230912085600-1.png||height="519" width="731"]]
2 +[[image:image-20230911134259-1.png||height="570" width="570"]]
3 3  
4 4  
5 -
6 -
7 -
8 -
9 -
10 -
11 -
12 12  **Table of Contents:**
13 13  
14 14  {{toc/}}
... ... @@ -20,24 +20,27 @@
20 20  
21 21  = 1. Introduction =
22 22  
23 -== 1.1 What is DDS45-NB NB-IoT Distance Detection Sensor ==
16 +== 1.1 What is DDS20-NB NB-IoT Ultrasonic liquid level Sensor ==
24 24  
25 25  
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.
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.
27 27  
28 -It detects the distance (% style="color:blue" %)** between the measured object and the sensor**(%%), and and send IoT platform via NB-IoT network.
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. 
29 29  
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.
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.
31 31  
32 -DDS45-NB (% style="color:blue" %)**supports BLE configure **(%%)and(% style="color:blue" %)** OTA update**(%%) which make user easy to use.
25 +PS-NB-NA supports different uplink methods including **MQTT, MQTTs, UDP & TCP** for different application requirement, and support uplinks to various IoT Servers.
33 33  
34 -DDS45-NB is powered by (% style="color:blue" %)**8500mAh Li-SOCI2 battery**(%%), it is designed for long-term use up to severa years.
27 +PS-NB-NA **supports BLE configure **and** OTA update** which make user easy to use.
35 35  
36 -DDS45-NB has optional built-in SIM card and default IoT server connection version. Which makes it works with simple configuration.
29 +PS-NB-NA is powered by **8500mAh Li-SOCI2 battery**, it is designed for long-term use up to severa years.
37 37  
38 -[[image:image-20230912102813-2.png||height="320" width="923"]]
31 +PS-NB-NA has optional built-in SIM card and default IoT server connection version. Which makes it works with simple configuration.
39 39  
40 40  
34 +[[image:image-20230911140426-2.png||height="320" width="951"]]
35 +
36 +
41 41  == 1.2 ​Features ==
42 42  
43 43  
... ... @@ -196,7 +196,7 @@
196 196  Reset DDS20-NB and see if the BLUE LED is slowly blinking.
197 197  )))
198 198  
199 -[[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]]
200 200  
201 201  (((
202 202  (% style="color:red" %)**Note :**(% style="color:red; display:none" %)** **
... ... @@ -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/DDS45-NB_NB-IoT_Distance_Detection_Sensor_User_Manual/WebHome/image-20230912102813-2.png?width=923&height=320&rev=1.1||alt="image-20230912102813-2.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 DDS45-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:**
... ... @@ -417,7 +417,7 @@
417 417  
418 418  These bytes include the hardware and software version.
419 419  
420 -(% 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
421 421  
422 422  (% style="color:#037691" %)**Lower byte:**(%%) Specify the software version: 0x64=100, means firmware version 100
423 423  
... ... @@ -444,6 +444,20 @@
444 444  **99**    Not known or not detectable
445 445  
446 446  
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 +
447 447  (% style="color:blue" %)**TimeStamp:   **
448 448  
449 449  Unit TimeStamp Example: 64d49439(H) = 1691653177(D)
... ... @@ -471,123 +471,60 @@
471 471  (% style="color:#4472c4" %)**field1=27.9&field2=49.9&field3=3.23&field4=28**
472 472  
473 473  
474 -== 2.3  ​Uplink Payload ==
467 +== 2.3 Test Uplink and Change Update Interval ==
475 475  
476 476  
477 -(((
478 -DDS20-NB will uplink payload via LoRaWAN with below payload format: 
479 -)))
470 +By default, Sensor will send uplinks (% style="color:blue" %)**every 2 hours**(%%) & AT+NOUD=8
480 480  
481 -(((
482 -Uplink payload includes in total 8 bytes.
483 -)))
472 +User can use below commands to change the (% style="color:blue" %)**uplink interval**.
484 484  
485 -(% border="1" cellspacing="5" style="background-color:#f2f2f2; width:510px" %)
486 -|=(% 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
487 -|(% style="width:95px" %)Value|(% style="width:61px" %)[[BAT>>||anchor="H2.3.1A0BatteryInfo"]]|(((
488 -[[Distance>>||anchor="H2.3.2A0Distance"]]
489 -(unit: mm)
490 -)))|[[Digital Interrupt (Optional)>>||anchor="H2.3.3A0InterruptPin"]]|(((
491 -[[Temperature (Optional)>>||anchor="H2.3.4A0DS18B20Temperaturesensor"]]
492 -)))|[[Sensor Flag>>||anchor="H2.3.5A0SensorFlag"]]
474 +(% style="color:#037691" %)**AT+TDC=600 ** (%%) ~/~/ Set Update Interval to 600s
493 493  
494 -[[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.
495 495  
496 496  
497 -=== 2.3.1  Battery Info ===
479 +== 2.4 Multi-Samplings and One uplink ==
498 498  
499 499  
500 -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:
501 501  
502 -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)
503 503  
504 -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.
505 505  
488 +The diagram below explains the relationship between TR, NOUD, and TDC more clearly:
506 506  
507 -=== 2.3.2  Distance ===
490 +[[image:1692424376354-959.png]]
508 508  
509 509  
510 -(((
511 -Get the distance. Flat object range 20mm - 2000mm.
512 -)))
493 +== 2.5 Humidity and Temperature alarm function ==
513 513  
514 -(((
515 -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" %)** **
516 516  
517 -(% style="color:blue" %)**0605(H) = 1541 (D) = 1541 mm.**
518 -)))
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.
519 519  
520 -* If the sensor value is 0x0000, it means system doesn't detect ultrasonic sensor.
521 521  
522 -* If the sensor value lower than 0x0014 (20mm), the sensor value will be invalid.
499 +(% style="color:blue" %)**AT Commands:**
523 523  
524 -=== 2.3.3  Interrupt Pin ===
501 +(% style="color:#037691" %)**AT+ SHHUM=min,max**
525 525  
503 +Example: AT+ SHHUM=50,80  ~/~/ Alarm when humidity lower than 50 or higher than 80.
526 526  
527 -This data field shows if this packet is generated by interrupt or not.
528 528  
529 -**Example:**
506 +(% style="color:#037691" %)**AT+ SHTEMP=min,max**
530 530  
531 -0x00: Normal uplink packet.
508 +Example: AT+ SHTEMP=20,30  ~/~/ Alarm when temperature lower than 20 or higher than 30
532 532  
533 -0x01: Interrupt Uplink Packet.
534 534  
511 +(% style="color:red" %)**Notice:**
535 535  
536 -=== 2.3.4  DS18B20 Temperature sensor ===
513 +* To disable Alarm, user can set min and max to same value , such as (% style="color:#037691" %)**AT+SHTEMP=0,0.**
537 537  
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.**
538 538  
539 -This is optional, user can connect external DS18B20 sensor to the +3.3v, 1-wire and GND pin . and this field will report temperature.
540 -
541 -**Example**:
542 -
543 -If payload is: 0105H:  (0105 & FC00 == 0), temp = 0105H /10 = 26.1 degree
544 -
545 -If payload is: FF3FH :  (FF3F & FC00 == 1) , temp = (FF3FH - 65536)/10 = -19.3 degrees.
546 -
547 -
548 -=== 2.3.5  Sensor Flag ===
549 -
550 -
551 -(((
552 -0x01: Detect Ultrasonic Sensor
553 -)))
554 -
555 -(((
556 -0x00: No Ultrasonic Sensor
557 -
558 -
559 -)))
560 -
561 -== 2.4 Test Uplink and Change Update Interval ==
562 -
563 -
564 -By default, Sensor will send uplinks (% style="color:blue" %)**every 2 hours**(%%) & AT+NOUD=8
565 -
566 -User can use below commands to change the (% style="color:blue" %)**uplink interval**.
567 -
568 -(% style="color:#037691" %)**AT+TDC=600 ** (%%) ~/~/ Set Update Interval to 600s
569 -
570 -User can also push the button for more than 1 seconds to activate an uplink.
571 -
572 -
573 -== 2.5 Multi-Samplings and One uplink ==
574 -
575 -
576 -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:
577 -
578 -* (% 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)
579 -
580 -* (% 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.
581 -
582 -The diagram below explains the relationship between TR, NOUD, and TDC more clearly:
583 -
584 -[[image:1692424376354-959.png]]
585 -
586 -
587 587  == 2.6 Trggier an uplink by external interrupt ==
588 588  
589 589  
590 -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.
591 591  
592 592  (% style="color:blue" %)**AT command:**
593 593  
... ... @@ -601,12 +601,12 @@
601 601  
602 602  * (% style="color:#037691" %)**AT+INTMOD=3  **(%%) ~/~/ Trigger by rising edge
603 603  
604 -= 3. Configure DDS20-NB =
534 += 3. Configure S31x-NB =
605 605  
606 606  == 3.1 Configure Methods ==
607 607  
608 608  
609 -DDS20-NB supports below configure method:
539 +S31x-NB supports below configure method:
610 610  
611 611  * AT Command via Bluetooth Connection (**Recommended**): [[BLE Configure Instruction>>http://wiki.dragino.com/xwiki/bin/view/Main/BLE%20Bluetooth%20Remote%20Configure/]].
612 612  
... ... @@ -695,7 +695,7 @@
695 695  = 4. Battery & Power Consumption =
696 696  
697 697  
698 -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.
699 699  
700 700  [[**Battery Info & Power Consumption Analyze**>>http://wiki.dragino.com/xwiki/bin/view/Main/How%20to%20calculate%20the%20battery%20life%20of%20Dragino%20sensors%3F/]] .
701 701  
... ... @@ -709,7 +709,7 @@
709 709  
710 710  * Fix bugs.
711 711  
712 -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]]**
713 713  
714 714  Methods to Update Firmware:
715 715  
... ... @@ -727,24 +727,11 @@
727 727  [[See BC660K-GL AT Command set>>url:https://www.dropbox.com/sh/5f6ssda5fum8rvs/AABT68l8ZzWOvZ5eg2qwOoFda?dl=0]]
728 728  
729 729  
730 -= 7.  Trouble Shooting =
660 += 7. Order Info =
731 731  
732 -== 7.1  Why i always see 0x0000 or 0 for the distance value? ==
733 733  
663 +Part Number: (% style="color:blue" %)**S31-NB-XX  / S31B-NB-XX**
734 734  
735 -(((
736 -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.
737 -
738 -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.
739 -
740 -
741 -)))
742 -
743 -= 8. Order Info =
744 -
745 -
746 -Part Number: (% style="color:blue" %)**DDS20-NB-XX**
747 -
748 748  (% style="color:red" %)**XX**(%%):
749 749  
750 750  * (% style="color:#037691" %)**GE**(%%): General version ( Exclude SIM card)
... ... @@ -754,12 +754,12 @@
754 754  (% 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
755 755  
756 756  
757 -= 9. ​Packing Info =
674 += 8. ​Packing Info =
758 758  
759 759  
760 760  (% style="color:#037691" %)**Package Includes**:
761 761  
762 -* DDS20-NB NB-IoT Ultrasonic liquid level sensor x 1
679 +* S31-NB or S31-NB NB-IoT Sensor Node x 1
763 763  
764 764  * External antenna x 1
765 765  
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773 773  
774 774  * Weight / pcs : 180g
775 775  
776 -= 10. Support =
693 += 9. Support =
777 777  
778 778  
779 779  * 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.
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