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Version 84.24 by Xiaoling on 2023/09/11 16:01
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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: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"]]
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
216
217 == 1.7 Precautions ==
218
219
220 * 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.
221
222 * 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.
223
224 * 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.
225
226 (% style="display:none" %)
227
228
229
230 == 1.8 Sleep mode and working mode ==
231
232
233 (% 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.
234
235 (% 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.
236
237
238 == 1.9 Button & LEDs ==
239
240
241 [[image:Main.User Manual for LoRaWAN End Nodes.D20-LBD22-LBD23-LB_LoRaWAN_Temperature_Sensor_User_Manual.WebHome@1675071855856-879.png]]
242
243
244 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
245 |=(% 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**
246 |(% style="width:167px" %)Pressing ACT between 1s < time < 3s|(% style="width:117px" %)Send an uplink|(% style="width:225px" %)(((
247 If sensor has already attached to NB-IoT network, sensor will send an uplink packet, (% style="color:blue" %)**blue led** (%%)will blink once.
248 Meanwhile, BLE module will be active and user can connect via BLE to configure device.
249 )))
250 |(% style="width:167px" %)Pressing ACT for more than 3s|(% style="width:117px" %)Active Device|(% style="width:225px" %)(((
251 (% 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.
252 (% style="color:green" %)**Green led**(%%) will solidly turn on for 5 seconds after joined in network.
253 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.
254 )))
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
257
258
259 == 1.10 BLE connection ==
260
261
262 DDS20-NB support BLE remote configure and firmware update.
263
264
265 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:
266
267 * Press button to send an uplink
268 * Press button to active device.
269 * Device Power on or reset.
270
271 If there is no activity connection on BLE in 60 seconds, sensor will shut down BLE module to enter low power mode.
272
273
274 == 1.11 Pin Definitions & Switch ==
275
276
277 [[image:image-20230819104805-5.png]]
278
279
280 === 1.11.1 Jumper JP2 ===
281
282
283 Power on Device when put this jumper.
284
285
286 === 1.11.2 BOOT MODE / SW1 ===
287
288
289 **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.
290
291 **2)** (% style="color:blue" %)**Flash**(%%): work mode, device starts to work and send out console output for further debug
292
293
294 === 1.11.3 Reset Button ===
295
296
297 Press to reboot the device.
298
299 (% style="display:none" %)
300
301
302 == 1.12 Mechanical ==
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 == 2.1 Send data to IoT server via NB-IoT network ==
322
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.
325
326
327 Below shows the network structure:
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"]]
330
331
332 There are two version: (% style="color:blue" %)**-GE**(%%) and (% style="color:blue" %)**-1D**(%%) version of DDS20-NB.
333
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.
336
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
339 * 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]]. 
340
341 Below shows result of different server as a glance.
342
343 (% border="1" cellspacing="4" style="width:515px" %)
344 |(% 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**
345 |(% 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" %)(((
346 (% style="text-align:center" %)
347 [[image:image-20230819113244-8.png||height="183" width="367"]]
348 )))|(% style="width:170px" %)
349 |(% 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" %)(((
350 (% style="text-align:center" %)
351 [[image:image-20230819113244-9.png||height="119" width="367"]]
352 )))|(% style="width:170px" %)
353 |(% 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" %)
354 |(% 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" %)
355 |(% 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" %)
356 |(% 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" %)(((
357 (% style="text-align:center" %)
358 [[image:image-20230819113244-10.png||height="104" width="367"]]
359 )))|(% style="width:170px" %)
360 |(% 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" %)(((
361 (% style="text-align:center" %)
362 [[image:image-20230819113244-11.png||height="141" width="367"]]
363 )))|(% style="width:170px" %)
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]].
366
367
368 == 2.2 ​Payload Types ==
369
370
371 To meet different server requirement, DDS20-NB supports different payload type.
372
373 **Includes:**
374
375 * [[General JSON format payload>>||anchor="H2.2.1GeneralJsonFormat28Type3D529"]]. (Type=5)
376
377 * [[HEX format Payload>>||anchor="H2.2.2HEXformatPayload28Type3D029"]]. (Type=0)
378
379 * [[ThingSpeak Format>>||anchor="H2.2.4ThingSpeakPayload28Type3D129"]]. (Type=1)
380
381 * [[ThingsBoard Format>>||anchor="H2.2.3ThingsBoardPayload28Type3D329"]]. (Type=3)
382
383 User can specify the payload type when choose the connection protocol. Example:
384
385 (% style="color:#037691" %)**AT+PRO=2,0**  (%%) ~/~/ Use UDP Connection & hex Payload
386
387 (% style="color:#037691" %)**AT+PRO=2,5**   (%%) ~/~/ Use UDP Connection & Json Payload
388
389 (% style="color:#037691" %)**AT+PRO=3,5 ** (%%) ~/~/ Use MQTT Connection & Json Payload
390
391
392 === 2.2.1 General Json Format(Type~=5) ===
393
394
395 This is the General Json Format. As below:
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}}**
398
399
400 (% style="color:red" %)**Notice, from above payload:**
401
402 * Temperature , Humidity , Battery & Signal are the value at uplink time.
403
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
406
407
408 === 2.2.2 HEX format Payload(Type~=0) ===
409
410
411 This is the HEX Format. As below:
412
413 (% style="color:#4472c4" %)**f86620705346276200640cba16010000000011011801e864d49c2d011a01e364d49925011901eb64d49871011901e564d497bd011a01e664d49709011901e964d49655011a01e864d495a1011a01e864d494ed011801e864d49439**
414
415 [[image:1692424009971-458.png]]
416
417
418 (% style="color:blue" %)**Version:**
419
420 These bytes include the hardware and software version.
421
422 (% style="color:#037691" %)**Higher byte:**(%%) Specify Sensor Model: 0x00 for DDS20-NB
423
424 (% style="color:#037691" %)**Lower byte:**(%%) Specify the software version: 0x64=100, means firmware version 100
425
426
427 (% style="color:blue" %)**BAT (Battery Info):**
428
429 Ex1: 0x0CBA = 3258mV
430
431
432 (% style="color:blue" %)**Signal Strength:**
433
434 NB-IoT Network signal Strength.
435
436 **Ex1: 0x16 = 22**
437
438 **0**  -113dBm or less
439
440 **1**  -111dBm
441
442 **2...30** -109dBm... -53dBm
443
444 **31**   -51dBm or greater
445
446 **99**    Not known or not detectable
447
448
449 (% style="color:blue" %)**TimeStamp:   **
450
451 Unit TimeStamp Example: 64d49439(H) = 1691653177(D)
452
453 Put the decimal value into this link(https:~/~/www.epochconverter.com/) to get the time.
454
455
456 === 2.2.3 ThingsBoard Payload(Type~=3) ===
457
458
459 Type3 payload special design for ThingsBoard, it will also configure other default server to ThingsBoard.
460
461 (% style="color:#4472c4" %)**{"IMEI":866207053462762,"temperature":29.2,"humidity":54.2,"battery":3.27,"signal":24}**
462
463
464 === 2.2.4 ThingSpeak Payload(Type~=1) ===
465
466
467 This payload meets ThingSpeak platform requirement. It includes only four fields. Form 1~~4 are:
468
469 Temperature, Humidity, Battery & Signal. This payload type only valid for ThingsSpeak Platform
470
471 As below:
472
473 (% style="color:#4472c4" %)**field1=27.9&field2=49.9&field3=3.23&field4=28**
474
475
476 == 2.3  ​Uplink Payload ==
477
478
479 (((
480 DDS20-NB will uplink payload via LoRaWAN with below payload format: 
481 )))
482
483 (((
484 Uplink payload includes in total 8 bytes.
485 )))
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"]]
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"]]
497
498
499 === 2.3.1  Battery Info ===
500
501
502 Check the battery voltage for DDS20-NB.
503
504 Ex1: 0x0B45 = 2885mV
505
506 Ex2: 0x0B49 = 2889mV
507
508
509 === 2.3.2  Distance ===
510
511
512 (((
513 Get the distance. Flat object range 20mm - 2000mm.
514 )))
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
519 (% style="color:blue" %)**0605(H) = 1541 (D) = 1541 mm.**
520 )))
521
522 * If the sensor value is 0x0000, it means system doesn't detect ultrasonic sensor.
523
524 * If the sensor value lower than 0x0014 (20mm), the sensor value will be invalid.
525
526
527
528 === 2.3.3  Interrupt Pin ===
529
530
531 This data field shows if this packet is generated by interrupt or not.
532
533 **Example:**
534
535 0x00: Normal uplink packet.
536
537 0x01: Interrupt Uplink Packet.
538
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 == 2.6 Trggier an uplink by external interrupt ==
592
593
594 DDS20-NB has an external trigger interrupt function. Users can use the PB15 pin to trigger the upload of data packets.
595
596 (% style="color:blue" %)**AT command:**
597
598 * (% style="color:#037691" %)**AT+INTMOD **(%%) ~/~/ Set the trigger interrupt mode
599
600 * (% style="color:#037691" %)**AT+INTMOD=0 **(%%) ~/~/ Disable Interrupt
601
602 * (% style="color:#037691" %)**AT+INTMOD=1 **(%%) ~/~/ Trigger by rising and falling edge
603
604 * (% style="color:#037691" %)**AT+INTMOD=2 **(%%) ~/~/ Trigger by falling edge
605
606 * (% style="color:#037691" %)**AT+INTMOD=3  **(%%) ~/~/ Trigger by rising edge
607
608
609
610 = 3. Configure DDS20-NB =
611
612 == 3.1 Configure Methods ==
613
614
615 DDS20-NB supports below configure method:
616
617 * AT Command via Bluetooth Connection (**Recommended**): [[BLE Configure Instruction>>http://wiki.dragino.com/xwiki/bin/view/Main/BLE%20Bluetooth%20Remote%20Configure/]].
618
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
621
622
623 == 3.2 AT Commands Set ==
624
625
626 AT+<CMD>?        : Help on <CMD>
627
628 AT+<CMD>         : Run <CMD>
629
630 AT+<CMD>=<value> : Set the value
631
632 AT+<CMD>=?       : Get the value
633
634
635 (% style="color:blue" %)**General Commands**      
636
637 AT                    : Attention       
638
639 AT?  : Short Help     
640
641 ATZ  : MCU Reset    
642
643 AT+TDC  : Application Data Transmission Interval
644
645 AT+CFG  : Print all configurations
646
647 AT+CFGMOD           : Working mode selection
648
649 AT+DEUI  : Get or set the Device ID
650
651 AT+INTMOD            : Set the trigger interrupt mode
652
653 AT+5VT           : Set extend the time of 5V power  
654
655 AT+PRO          : Choose agreement
656
657 AT+RXDL  : Extend the sending and receiving time
658
659 AT+DNSCFG  : Get or Set DNS Server
660
661 AT+GETSENSORVALUE   : Returns the current sensor measurement
662
663 AT+NOUD  : Get or Set the number of data to be uploaded
664
665 AT+CDP     : Read or Clear cached data
666
667 AT+SHTEMP:  Get or Set alarm of temp
668
669 AT+SHHUM:  Get or Set alarm of moisture
670
671 AT+SERVADDR :  Server Address
672
673
674 (% style="color:blue" %)**UDP Management**
675
676 AT+CFM  :  Upload confirmation mode (only valid for UDP)
677
678
679 (% style="color:blue" %)**MQTT Management**
680
681 AT+CLIENT               : Get or Set MQTT client
682
683 AT+UNAME              : Get or Set MQTT Username
684
685 AT+PWD                  : Get or Set MQTT password
686
687 AT+PUBTOPIC  : Get or Set MQTT publish topic
688
689 AT+SUBTOPIC  : Get or Set MQTT subscription topic
690
691
692 (% style="color:blue" %)**Information**          
693
694 AT+FDR  : Factory Data Reset
695
696 AT+PWORD  : Serial Access Password
697
698 AT+LDATA  : Get the last upload data
699
700 AT+CDP  : Read or Clear cached data
701
702
703 = 4. Battery & Power Consumption =
704
705
706 DDS20-NB use ER26500 + SPC1520 battery pack. See below link for detail information about the battery info and how to replace.
707
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
710
711 = 5. Firmware update =
712
713
714 User can change device firmware to::
715
716 * Update with new features.
717
718 * Fix bugs.
719
720 Firmware and changelog can be downloaded from : **[[Firmware download link>>https://www.dropbox.com/sh/nyzeu0lf0amcaek/AAC6UZrqyTcAyJgXOH7l9F9Ka?dl=0]]**
721
722 Methods to Update Firmware:
723
724 * (Recommended way) OTA firmware update via BLE: [[**Instruction**>>url:http://wiki.dragino.com/xwiki/bin/view/Main/BLE_Firmware_Update_NB_Sensors_BC660K-GL/]].
725
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
728
729
730 = 6. FAQ =
731
732 == 6.1 How can I access t BC660K-GL AT Commands? ==
733
734
735 User can access to BC660K-GL directly and send AT Commands.
736
737 [[See BC660K-GL AT Command set>>url:https://www.dropbox.com/sh/5f6ssda5fum8rvs/AABT68l8ZzWOvZ5eg2qwOoFda?dl=0]]
738
739
740 = 7.  Trouble Shooting =
741
742 == 7.1  Why i always see 0x0000 or 0 for the distance value? ==
743
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 (% style="color:red" %)**XX**(%%):
759
760 * (% style="color:#037691" %)**GE**(%%): General version ( Exclude SIM card)
761
762 * (% style="color:#037691" %)**1D**(%%): with 1NCE* 10 years 500MB SIM card and Pre-configure to DataCake server
763
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
766
767 = 9. ​Packing Info =
768
769
770 (% style="color:#037691" %)**Package Includes**:
771
772 * DDS20-NB NB-IoT Ultrasonic liquid level sensor x 1
773
774 * External antenna x 1
775
776 (% style="color:#037691" %)**Dimension and weight**:
777
778 * Device Size: 13.0 x 5 x 4.5 cm
779
780 * Device Weight: 150g
781
782 * Package Size / pcs : 14.0 x 8x 5 cm
783
784 * Weight / pcs : 180g
785
786
787
788 = 10. Support =
789
790
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
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]].
794
795 (% style="display:none" %) (%%)