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Version 84.22 by Xiaoling on 2023/09/11 15:57
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1 (% style="text-align:center" %)
2 [[image:image-20230911134259-1.png||height="570" width="570"]]
3
4
5 **Table of Contents:**
6
7 {{toc/}}
8
9
10
11
12
13
14 = 1. Introduction =
15
16 == 1.1 What is DDS20-NB NB-IoT Ultrasonic liquid level Sensor ==
17
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.
20
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
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.
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.
26
27 DDS20-NB (% style="color:blue" %)**supports BLE configure **(%%)and(% style="color:blue" %)** OTA update**(%%) which make user easy to use.
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.
30
31 DDS20-NB has optional built-in SIM card and default IoT server connection version. Which makes it works with simple configuration.
32
33
34 [[image:image-20230911140426-2.png||height="320" width="951"]]
35
36
37 == 1.2 ​Features ==
38
39
40 * NB-IoT Bands: B1/B2/B3/B4/B5/B8/B12/B13/B17/B18/B19/B20/B25/B28/B66/B70/B85 @H-FDD
41 * Ultra-low power consumption
42 * Liquid Level Measurement by Ultrasonic technology
43 * Measure through container, No need to contact Liquid
44 * Valid level range 20mm - 2000mm
45 * Accuracy: ±(5mm+S*0.5%) (S: Measure Value)
46 * Multiply Sampling and one uplink
47 * Support Bluetooth v5.1 remote configure and update firmware
48 * Uplink on periodically
49 * Downlink to change configure
50 * IP66 Waterproof Enclosure
51 * 8500mAh Battery for long term use
52 * Nano SIM card slot for NB-IoT SIM
53
54 == 1.3 Specification ==
55
56
57 (% style="color:blue" %)**Common DC Characteristics:**
58
59 * Supply Voltage: 2.5v ~~ 3.6v
60 * Operating Temperature: -40 ~~ 85°C
61
62 (% style="color:blue" %)**NB-IoT Spec:**
63
64 (% style="color:#037691" %)**NB-IoT Module: BC660K-GL**
65
66 (% style="color:#037691" %)**Support Bands:**
67
68 * B1 @H-FDD: 2100MHz
69 * B2 @H-FDD: 1900MHz
70 * B3 @H-FDD: 1800MHz
71 * B4 @H-FDD: 2100MHz
72 * B5 @H-FDD: 860MHz
73 * B8 @H-FDD: 900MHz
74 * B12 @H-FDD: 720MHz
75 * B13 @H-FDD: 740MHz
76 * B17 @H-FDD: 730MHz
77 * B18 @H-FDD: 870MHz
78 * B19 @H-FDD: 870MHz
79 * B20 @H-FDD: 790MHz
80 * B25 @H-FDD: 1900MHz
81 * B28 @H-FDD: 750MHz
82 * B66 @H-FDD: 2000MHz
83 * B70 @H-FDD: 2000MHz
84 * B85 @H-FDD: 700MHz
85
86 (% style="color:blue" %)**Battery:**
87
88 * Li/SOCI2 un-chargeable battery
89 * Capacity: 8500mAh
90 * Self Discharge: <1% / Year @ 25°C
91 * Max continuously current: 130mA
92 * Max boost current: 2A, 1 second
93
94 (% style="color:blue" %)**Power Consumption**
95
96 * STOP Mode: 10uA @ 3.3v
97 * Max transmit power: 350mA@3.3v
98
99 == 1.4 Suitable Container & Liquid ==
100
101
102 * Solid Wall container such as: steel, iron, glass, ceramics, non-foaming plastics etc.
103 * Container shape is regular, and surface is smooth.
104 * Container Thickness:
105 ** Pure metal material.  2~~8mm, best is 3~~5mm
106 ** Pure non metal material: <10 mm
107 * Pure liquid without irregular deposition.
108
109 (% style="display:none" %)
110
111 == 1.5 Install DDS20-NB ==
112
113
114 (% style="color:blue" %)**Step 1**(%%):  ** Choose the installation point.**
115
116 DDS20-NB (% style="color:red" %)**MUST**(%%) be installed on the container bottom middle position.
117
118 [[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-20220615091045-3.png?rev=1.1||alt="image-20220615091045-3.png"]]
119
120
121 (((
122 (% style="color:blue" %)**Step 2**(%%):  **Polish the installation point.**
123 )))
124
125 (((
126 For Metal Surface with paint, it is important to polish the surface, first use crude sand paper to polish the paint level , then use exquisite sand paper to polish the metal level to make it shine & smooth.
127 )))
128
129 [[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-20230613143052-5.png?rev=1.1||alt="image-20230613143052-5.png"]]
130
131
132 No polish needed if the container is shine metal surface without paint or non-metal container.
133
134 [[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-20230613143125-6.png?rev=1.1||alt="image-20230613143125-6.png"]]
135
136
137 (((
138 (% style="color:blue" %)**Step3:   **(%%)**Test the installation point.**
139 )))
140
141 (((
142 Power on DDS20-NB, check if the blue LED is on, If the blue LED is on, means the sensor works. Then put ultrasonic coupling paste on the sensor and put it tightly on the installation point.
143 )))
144
145 (((
146 It is necessary to put the coupling paste between the sensor and the container, otherwise DDS20-NB won't detect the liquid level.
147 )))
148
149 (((
150 After paste the DDS20-NB well, power on DDS20-NB. In the first 30 seconds of booting, device will check the sensors status and BLUE LED will show the status as below. After 30 seconds, BLUE LED will be off to save battery life.
151 )))
152
153
154 (((
155 (% style="color:blue" %)**LED Status:**
156 )))
157
158 * (((
159 **Onboard LED**: When power on device, the onboard LED will fast blink 4 times which means detect the sensor well.
160 )))
161
162 * (((
163 (% style="color:blue" %)**BLUE LED**(% style="color:red" %)** always ON**(%%): Sensor is power on but doesn't detect liquid. There is problem in installation point.
164 )))
165 * (((
166 (% style="color:blue" %)**BLUE LED**(% style="color:red" %)** slowly blinking**(%%): Sensor detects Liquid Level, The installation point is good.
167 )))
168
169 (((
170 DDS20-NB will enter into low power mode at 30 seconds after system reset or power on, Blue LED will be off after that.
171 )))
172
173
174 (((
175 (% style="color:red" %)**Note :**(%%)** (% style="color:blue" %)Ultrasonic coupling paste(%%)**(% style="color:blue" %) (%%) is subjected in most shipping way. So the default package doesn't include it and user needs to purchase locally.
176 )))
177
178
179 (((
180 (% style="color:blue" %)**Step4:   **(%%)**Install use Epoxy ab glue.**
181 )))
182
183 (((
184 Prepare Eproxy AB glue.
185 )))
186
187 (((
188 Put Eproxy AB glue in the sensor and press it hard on the container installation point.
189 )))
190
191 (((
192 Reset DDS20-NB and see if the BLUE LED is slowly blinking.
193 )))
194
195 [[image:image-20230809172509-1.png]]
196
197 (((
198 (% style="color:red" %)**Note :**(% style="color:red; display:none" %)** **
199
200 (% style="color:red" %)**1:**(%%)** (% style="color:blue" %)Eproxy AB glue(%%)** needs 3~~ 5 minutes to stable attached. we can use other glue material to keep it in the position.
201 )))
202
203 (((
204 (% style="color:red" %)**2:**(%%)** (% style="color:blue" %)Eproxy AB glue(%%)** is subjected in most shipping way. So the default package doesn't include it and user needs to purchase locally.
205 )))
206
207
208 == 1.6 Applications ==
209
210
211 * Smart liquid control solution
212
213 * Smart liquefied gas solution
214
215 == 1.7 Precautions ==
216
217
218 * At room temperature, containers of different materials, such as steel, glass, iron, ceramics, non-foamed plastics and other dense materials, have different detection blind areas and detection limit heights.
219
220 * For containers of the same material at room temperature, the detection blind zone and detection limit height are also different for the thickness of the container.
221
222 * When the detected liquid level exceeds the effective detection value of the sensor, and the liquid level of the liquid to be measured shakes or tilts, the detected liquid height is unstable.
223
224 (% style="display:none" %)
225
226
227
228 == 1.8 Sleep mode and working mode ==
229
230
231 (% 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.
232
233 (% 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.
234
235
236 == 1.9 Button & LEDs ==
237
238
239 [[image:Main.User Manual for LoRaWAN End Nodes.D20-LBD22-LBD23-LB_LoRaWAN_Temperature_Sensor_User_Manual.WebHome@1675071855856-879.png]]
240
241
242 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
243 |=(% style="width: 167px;background-color:#4F81BD;color:white" %)**Behavior on ACT**|=(% style="width: 117px;background-color:#4F81BD;color:white" %)**Function**|=(% style="width:225px;background-color:#4F81BD;color:white" %)**Action**
244 |(% style="width:167px" %)Pressing ACT between 1s < time < 3s|(% style="width:117px" %)Send an uplink|(% style="width:225px" %)(((
245 If sensor has already attached to NB-IoT network, sensor will send an uplink packet, (% style="color:blue" %)**blue led** (%%)will blink once.
246 Meanwhile, BLE module will be active and user can connect via BLE to configure device.
247 )))
248 |(% style="width:167px" %)Pressing ACT for more than 3s|(% style="width:117px" %)Active Device|(% style="width:225px" %)(((
249 (% style="color:green" %)**Green led**(%%) will fast blink 5 times, device will enter (% style="color:#037691" %)**OTA mode**(%%) for 3 seconds. And then start to attach NB-IoT network.
250 (% style="color:green" %)**Green led**(%%) will solidly turn on for 5 seconds after joined in network.
251 Once sensor is active, BLE module will be active and user can connect via BLE to configure device, no matter if device attach NB-IoT network or not.
252 )))
253 |(% 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.
254
255 == 1.10 BLE connection ==
256
257
258 DDS20-NB support BLE remote configure and firmware update.
259
260
261 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:
262
263 * Press button to send an uplink
264 * Press button to active device.
265 * Device Power on or reset.
266
267 If there is no activity connection on BLE in 60 seconds, sensor will shut down BLE module to enter low power mode.
268
269
270 == 1.11 Pin Definitions & Switch ==
271
272
273 [[image:image-20230819104805-5.png]]
274
275
276 === 1.11.1 Jumper JP2 ===
277
278
279 Power on Device when put this jumper.
280
281
282 === 1.11.2 BOOT MODE / SW1 ===
283
284
285 **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.
286
287 **2)** (% style="color:blue" %)**Flash**(%%): work mode, device starts to work and send out console output for further debug
288
289
290 === 1.11.3 Reset Button ===
291
292
293 Press to reboot the device.
294
295 (% style="display:none" %)
296
297
298 == 1.12 Mechanical ==
299
300
301 [[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"]]
302
303 [[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"]]
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/1675143909447-639.png?rev=1.1||alt="1675143909447-639.png"]]
306
307
308 (% style="color:blue" %)**Probe Mechanical:**
309
310 [[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"]]
311
312 [[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"]]
313
314
315 = 2. Use DDS20-NB to communicate with IoT Server =
316
317 == 2.1 Send data to IoT server via NB-IoT network ==
318
319
320 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.
321
322
323 Below shows the network structure:
324
325 [[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"]]
326
327
328 There are two version: (% style="color:blue" %)**-GE**(%%) and (% style="color:blue" %)**-1D**(%%) version of DDS20-NB.
329
330
331 (% 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.
332
333 * 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]].
334
335 * Set up sensor to point to IoT Server. See instruction of [[Configure to Connect Different Servers>>url:http://wiki.dragino.com/xwiki/bin/view/Main/General%20Configure%20to%20Connect%20to%20IoT%20server%20for%20-NB%20%26%20-NS%20NB-IoT%20models/#H3.Configuretoconnecttodifferentservers]]. 
336
337 Below shows result of different server as a glance.
338
339 (% border="1" cellspacing="4" style="width:515px" %)
340 |(% style="background-color:#4f81bd; color:white; width:100px" %)**Servers**|(% style="background-color:#4f81bd; color:white; width:300px" %)**Dash Board**|(% style="background-color:#4f81bd; color:white; width:115px" %)**Comments**
341 |(% style="width:127px" %)[[Node-Red>>url:http://wiki.dragino.com/xwiki/bin/view/Main/General%20Configure%20to%20Connect%20to%20IoT%20server%20for%20-NB%20%26%20-NS%20NB-IoT%20models/#H3.5A0Node-RedA028viaA0MQTT29]]|(% style="width:385px" %)(((
342 (% style="text-align:center" %)
343 [[image:image-20230819113244-8.png||height="183" width="367"]]
344 )))|(% style="width:170px" %)
345 |(% style="width:127px" %)[[DataCake>>url:http://wiki.dragino.com/xwiki/bin/view/Main/General%20Configure%20to%20Connect%20to%20IoT%20server%20for%20-NB%20%26%20-NS%20NB-IoT%20models/#H3.4Datacake]]|(% style="width:385px" %)(((
346 (% style="text-align:center" %)
347 [[image:image-20230819113244-9.png||height="119" width="367"]]
348 )))|(% style="width:170px" %)
349 |(% style="width:127px" %)[[Tago.IO>>url:http://wiki.dragino.com/xwiki/bin/view/Main/General%20Configure%20to%20Connect%20to%20IoT%20server%20for%20-NB%20%26%20-NS%20NB-IoT%20models/#H3.7A0Tago.ioA028viaA0MQTT29]]|(% style="width:385px" %) |(% style="width:170px" %)
350 |(% style="width:127px" %)[[General UDP>>url:http://wiki.dragino.com/xwiki/bin/view/Main/General%20Configure%20to%20Connect%20to%20IoT%20server%20for%20-NB%20%26%20-NS%20NB-IoT%20models/#H3.1GeneralA0UDPA0Connection]]|(% style="width:385px" %)Raw Payload. Need Developer to design Dash Board|(% style="width:170px" %)
351 |(% style="width:127px" %)[[General MQTT>>url:http://wiki.dragino.com/xwiki/bin/view/Main/General%20Configure%20to%20Connect%20to%20IoT%20server%20for%20-NB%20%26%20-NS%20NB-IoT%20models/#H3.2GeneralA0MQTTA0Connection]]|(% style="width:385px" %)Raw Payload. Need Developer to design Dash Board|(% style="width:170px" %)
352 |(% style="width:127px" %)[[ThingSpeak>>url:http://wiki.dragino.com/xwiki/bin/view/Main/General%20Configure%20to%20Connect%20to%20IoT%20server%20for%20-NB%20%26%20-NS%20NB-IoT%20models/#H3.3A0ThingSpeakA028viaA0MQTT29]]|(% style="width:385px" %)(((
353 (% style="text-align:center" %)
354 [[image:image-20230819113244-10.png||height="104" width="367"]]
355 )))|(% style="width:170px" %)
356 |(% style="width:127px" %)[[ThingsBoard>>url:http://wiki.dragino.com/xwiki/bin/view/Main/General%20Configure%20to%20Connect%20to%20IoT%20server%20for%20-NB%20%26%20-NS%20NB-IoT%20models/#H3.6A0ThingsBoard.CloudA028viaA0MQTT29]]|(% style="width:385px" %)(((
357 (% style="text-align:center" %)
358 [[image:image-20230819113244-11.png||height="141" width="367"]]
359 )))|(% style="width:170px" %)
360
361 (% 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]].
362
363
364 == 2.2 ​Payload Types ==
365
366
367 To meet different server requirement, DDS20-NB supports different payload type.
368
369 **Includes:**
370
371 * [[General JSON format payload>>||anchor="H2.2.1GeneralJsonFormat28Type3D529"]]. (Type=5)
372
373 * [[HEX format Payload>>||anchor="H2.2.2HEXformatPayload28Type3D029"]]. (Type=0)
374
375 * [[ThingSpeak Format>>||anchor="H2.2.4ThingSpeakPayload28Type3D129"]]. (Type=1)
376
377 * [[ThingsBoard Format>>||anchor="H2.2.3ThingsBoardPayload28Type3D329"]]. (Type=3)
378
379 User can specify the payload type when choose the connection protocol. Example:
380
381 (% style="color:#037691" %)**AT+PRO=2,0**  (%%) ~/~/ Use UDP Connection & hex Payload
382
383 (% style="color:#037691" %)**AT+PRO=2,5**   (%%) ~/~/ Use UDP Connection & Json Payload
384
385 (% style="color:#037691" %)**AT+PRO=3,5 ** (%%) ~/~/ Use MQTT Connection & Json Payload
386
387
388 === 2.2.1 General Json Format(Type~=5) ===
389
390
391 This is the General Json Format. As below:
392
393 (% 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}}**
394
395
396 (% style="color:red" %)**Notice, from above payload:**
397
398 * Temperature , Humidity , Battery & Signal are the value at uplink time.
399
400 * 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.
401
402 === 2.2.2 HEX format Payload(Type~=0) ===
403
404
405 This is the HEX Format. As below:
406
407 (% style="color:#4472c4" %)**f86620705346276200640cba16010000000011011801e864d49c2d011a01e364d49925011901eb64d49871011901e564d497bd011a01e664d49709011901e964d49655011a01e864d495a1011a01e864d494ed011801e864d49439**
408
409 [[image:1692424009971-458.png]]
410
411
412 (% style="color:blue" %)**Version:**
413
414 These bytes include the hardware and software version.
415
416 (% style="color:#037691" %)**Higher byte:**(%%) Specify Sensor Model: 0x00 for DDS20-NB
417
418 (% style="color:#037691" %)**Lower byte:**(%%) Specify the software version: 0x64=100, means firmware version 100
419
420
421 (% style="color:blue" %)**BAT (Battery Info):**
422
423 Ex1: 0x0CBA = 3258mV
424
425
426 (% style="color:blue" %)**Signal Strength:**
427
428 NB-IoT Network signal Strength.
429
430 **Ex1: 0x16 = 22**
431
432 **0**  -113dBm or less
433
434 **1**  -111dBm
435
436 **2...30** -109dBm... -53dBm
437
438 **31**   -51dBm or greater
439
440 **99**    Not known or not detectable
441
442
443 (% style="color:blue" %)**TimeStamp:   **
444
445 Unit TimeStamp Example: 64d49439(H) = 1691653177(D)
446
447 Put the decimal value into this link(https:~/~/www.epochconverter.com/) to get the time.
448
449
450 === 2.2.3 ThingsBoard Payload(Type~=3) ===
451
452
453 Type3 payload special design for ThingsBoard, it will also configure other default server to ThingsBoard.
454
455 (% style="color:#4472c4" %)**{"IMEI":866207053462762,"temperature":29.2,"humidity":54.2,"battery":3.27,"signal":24}**
456
457
458 === 2.2.4 ThingSpeak Payload(Type~=1) ===
459
460
461 This payload meets ThingSpeak platform requirement. It includes only four fields. Form 1~~4 are:
462
463 Temperature, Humidity, Battery & Signal. This payload type only valid for ThingsSpeak Platform
464
465 As below:
466
467 (% style="color:#4472c4" %)**field1=27.9&field2=49.9&field3=3.23&field4=28**
468
469 == 2.3  ​Uplink Payload ==
470
471
472 (((
473 DDS20-NB will uplink payload via LoRaWAN with below payload format: 
474 )))
475
476 (((
477 Uplink payload includes in total 8 bytes.
478 )))
479
480 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:510px" %)
481 |=(% 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
482 |(% style="width:95px" %)Value|(% style="width:61px" %)[[BAT>>||anchor="H2.3.1A0BatteryInfo"]]|(((
483 [[Distance>>||anchor="H2.3.2A0Distance"]]
484 (unit: mm)
485 )))|[[Digital Interrupt (Optional)>>||anchor="H2.3.3A0InterruptPin"]]|(((
486 [[Temperature (Optional)>>||anchor="H2.3.4A0DS18B20Temperaturesensor"]]
487 )))|[[Sensor Flag>>||anchor="H2.3.5A0SensorFlag"]]
488
489 [[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"]]
490
491
492 === 2.3.1  Battery Info ===
493
494
495 Check the battery voltage for DDS20-NB.
496
497 Ex1: 0x0B45 = 2885mV
498
499 Ex2: 0x0B49 = 2889mV
500
501
502 === 2.3.2  Distance ===
503
504
505 (((
506 Get the distance. Flat object range 20mm - 2000mm.
507 )))
508
509 (((
510 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" %)** **
511
512 (% style="color:blue" %)**0605(H) = 1541 (D) = 1541 mm.**
513 )))
514
515 * If the sensor value is 0x0000, it means system doesn't detect ultrasonic sensor.
516
517 * If the sensor value lower than 0x0014 (20mm), the sensor value will be invalid.
518
519 === 2.3.3  Interrupt Pin ===
520
521
522 This data field shows if this packet is generated by interrupt or not.
523
524 **Example:**
525
526 0x00: Normal uplink packet.
527
528 0x01: Interrupt Uplink Packet.
529
530
531 === 2.3.4  DS18B20 Temperature sensor ===
532
533
534 This is optional, user can connect external DS18B20 sensor to the +3.3v, 1-wire and GND pin . and this field will report temperature.
535
536 **Example**:
537
538 If payload is: 0105H:  (0105 & FC00 == 0), temp = 0105H /10 = 26.1 degree
539
540 If payload is: FF3FH :  (FF3F & FC00 == 1) , temp = (FF3FH - 65536)/10 = -19.3 degrees.
541
542
543 === 2.3.5  Sensor Flag ===
544
545
546 (((
547 0x01: Detect Ultrasonic Sensor
548 )))
549
550 (((
551 0x00: No Ultrasonic Sensor
552
553
554 )))
555
556 == 2.4 Test Uplink and Change Update Interval ==
557
558
559 By default, Sensor will send uplinks (% style="color:blue" %)**every 2 hours**(%%) & AT+NOUD=8
560
561 User can use below commands to change the (% style="color:blue" %)**uplink interval**.
562
563 (% style="color:#037691" %)**AT+TDC=600 ** (%%) ~/~/ Set Update Interval to 600s
564
565 User can also push the button for more than 1 seconds to activate an uplink.
566
567
568 == 2.5 Multi-Samplings and One uplink ==
569
570
571 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:
572
573 * (% 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)
574
575 * (% 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.
576
577 The diagram below explains the relationship between TR, NOUD, and TDC more clearly:
578
579 [[image:1692424376354-959.png]]
580
581
582 == 2.6 Trggier an uplink by external interrupt ==
583
584
585 DDS20-NB has an external trigger interrupt function. Users can use the PB15 pin to trigger the upload of data packets.
586
587 (% style="color:blue" %)**AT command:**
588
589 * (% style="color:#037691" %)**AT+INTMOD **(%%) ~/~/ Set the trigger interrupt mode
590
591 * (% style="color:#037691" %)**AT+INTMOD=0 **(%%) ~/~/ Disable Interrupt
592
593 * (% style="color:#037691" %)**AT+INTMOD=1 **(%%) ~/~/ Trigger by rising and falling edge
594
595 * (% style="color:#037691" %)**AT+INTMOD=2 **(%%) ~/~/ Trigger by falling edge
596
597 * (% style="color:#037691" %)**AT+INTMOD=3  **(%%) ~/~/ Trigger by rising edge
598
599 = 3. Configure DDS20-NB =
600
601 == 3.1 Configure Methods ==
602
603
604 DDS20-NB supports below configure method:
605
606 * AT Command via Bluetooth Connection (**Recommended**): [[BLE Configure Instruction>>http://wiki.dragino.com/xwiki/bin/view/Main/BLE%20Bluetooth%20Remote%20Configure/]].
607
608 * 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]].
609
610 == 3.2 AT Commands Set ==
611
612
613 AT+<CMD>?        : Help on <CMD>
614
615 AT+<CMD>         : Run <CMD>
616
617 AT+<CMD>=<value> : Set the value
618
619 AT+<CMD>=?       : Get the value
620
621
622 (% style="color:blue" %)**General Commands**      
623
624 AT                    : Attention       
625
626 AT?  : Short Help     
627
628 ATZ  : MCU Reset    
629
630 AT+TDC  : Application Data Transmission Interval
631
632 AT+CFG  : Print all configurations
633
634 AT+CFGMOD           : Working mode selection
635
636 AT+DEUI  : Get or set the Device ID
637
638 AT+INTMOD            : Set the trigger interrupt mode
639
640 AT+5VT           : Set extend the time of 5V power  
641
642 AT+PRO          : Choose agreement
643
644 AT+RXDL  : Extend the sending and receiving time
645
646 AT+DNSCFG  : Get or Set DNS Server
647
648 AT+GETSENSORVALUE   : Returns the current sensor measurement
649
650 AT+NOUD  : Get or Set the number of data to be uploaded
651
652 AT+CDP     : Read or Clear cached data
653
654 AT+SHTEMP:  Get or Set alarm of temp
655
656 AT+SHHUM:  Get or Set alarm of moisture
657
658 AT+SERVADDR :  Server Address
659
660
661 (% style="color:blue" %)**UDP Management**
662
663 AT+CFM  :  Upload confirmation mode (only valid for UDP)
664
665
666 (% style="color:blue" %)**MQTT Management**
667
668 AT+CLIENT               : Get or Set MQTT client
669
670 AT+UNAME              : Get or Set MQTT Username
671
672 AT+PWD                  : Get or Set MQTT password
673
674 AT+PUBTOPIC  : Get or Set MQTT publish topic
675
676 AT+SUBTOPIC  : Get or Set MQTT subscription topic
677
678
679 (% style="color:blue" %)**Information**          
680
681 AT+FDR  : Factory Data Reset
682
683 AT+PWORD  : Serial Access Password
684
685 AT+LDATA  : Get the last upload data
686
687 AT+CDP  : Read or Clear cached data
688
689
690 = 4. Battery & Power Consumption =
691
692
693 DDS20-NB use ER26500 + SPC1520 battery pack. See below link for detail information about the battery info and how to replace.
694
695 [[**Battery Info & Power Consumption Analyze**>>http://wiki.dragino.com/xwiki/bin/view/Main/How%20to%20calculate%20the%20battery%20life%20of%20Dragino%20sensors%3F/]] .
696
697
698 = 5. Firmware update =
699
700
701 User can change device firmware to::
702
703 * Update with new features.
704
705 * Fix bugs.
706
707 Firmware and changelog can be downloaded from : **[[Firmware download link>>https://www.dropbox.com/sh/nyzeu0lf0amcaek/AAC6UZrqyTcAyJgXOH7l9F9Ka?dl=0]]**
708
709 Methods to Update Firmware:
710
711 * (Recommended way) OTA firmware update via BLE: [[**Instruction**>>url:http://wiki.dragino.com/xwiki/bin/view/Main/BLE_Firmware_Update_NB_Sensors_BC660K-GL/]].
712
713 * 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]]**.
714
715 = 6. FAQ =
716
717 == 6.1 How can I access t BC660K-GL AT Commands? ==
718
719
720 User can access to BC660K-GL directly and send AT Commands.
721
722 [[See BC660K-GL AT Command set>>url:https://www.dropbox.com/sh/5f6ssda5fum8rvs/AABT68l8ZzWOvZ5eg2qwOoFda?dl=0]]
723
724
725 = 7.  Trouble Shooting =
726
727 == 7.1  Why i always see 0x0000 or 0 for the distance value? ==
728
729
730 (((
731 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.
732
733 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.
734 )))
735
736 = 8. Order Info =
737
738
739 Part Number: (% style="color:blue" %)**DDS20-NB-XX**
740
741 (% style="color:red" %)**XX**(%%):
742
743 * (% style="color:#037691" %)**GE**(%%): General version ( Exclude SIM card)
744
745 * (% style="color:#037691" %)**1D**(%%): with 1NCE* 10 years 500MB SIM card and Pre-configure to DataCake server
746
747 (% 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
748
749
750 = 9. ​Packing Info =
751
752
753 (% style="color:#037691" %)**Package Includes**:
754
755 * DDS20-NB NB-IoT Ultrasonic liquid level sensor x 1
756
757 * External antenna x 1
758
759 (% style="color:#037691" %)**Dimension and weight**:
760
761 * Device Size: 13.0 x 5 x 4.5 cm
762
763 * Device Weight: 150g
764
765 * Package Size / pcs : 14.0 x 8x 5 cm
766
767 * Weight / pcs : 180g
768
769 = 10. Support =
770
771
772 * 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.
773
774 * 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]].
775
776 (% style="display:none" %) (%%)