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Version 85.3 by Xiaoling on 2023/09/12 08:59
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1 (% style="text-align:center" %)
2 [[image:image-20230912085600-1.png||height="519" width="731"]]
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12 **Table of Contents:**
13
14 {{toc/}}
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20
21 = 1. Introduction =
22
23 == 1.1 What is DDS45-NB NB-IoT Distance Detection Sensor ==
24
25
26 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.
27
28 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
30 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.
31
32 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.
33
34 DDS20-NB (% style="color:blue" %)**supports BLE configure **(%%)and(% style="color:blue" %)** OTA update**(%%) which make user easy to use.
35
36 DDS20-NB is powered by (% style="color:blue" %)**8500mAh Li-SOCI2 battery**(%%), it is designed for long-term use up to severa years.
37
38 DDS20-NB has optional built-in SIM card and default IoT server connection version. Which makes it works with simple configuration.
39
40
41 [[image:image-20230911140426-2.png||height="320" width="951"]]
42
43
44 == 1.2 ​Features ==
45
46
47 * NB-IoT Bands: B1/B2/B3/B4/B5/B8/B12/B13/B17/B18/B19/B20/B25/B28/B66/B70/B85 @H-FDD
48 * Ultra-low power consumption
49 * Liquid Level Measurement by Ultrasonic technology
50 * Measure through container, No need to contact Liquid
51 * Valid level range 20mm - 2000mm
52 * Accuracy: ±(5mm+S*0.5%) (S: Measure Value)
53 * Multiply Sampling and one uplink
54 * Support Bluetooth v5.1 remote configure and update firmware
55 * Uplink on periodically
56 * Downlink to change configure
57 * IP66 Waterproof Enclosure
58 * 8500mAh Battery for long term use
59 * Nano SIM card slot for NB-IoT SIM
60
61
62 == 1.3 Specification ==
63
64
65 (% style="color:blue" %)**Common DC Characteristics:**
66
67 * Supply Voltage: 2.5v ~~ 3.6v
68 * Operating Temperature: -40 ~~ 85°C
69
70 (% style="color:blue" %)**NB-IoT Spec:**
71
72 (% style="color:#037691" %)**NB-IoT Module: BC660K-GL**
73
74 (% style="color:#037691" %)**Support Bands:**
75
76 * B1 @H-FDD: 2100MHz
77 * B2 @H-FDD: 1900MHz
78 * B3 @H-FDD: 1800MHz
79 * B4 @H-FDD: 2100MHz
80 * B5 @H-FDD: 860MHz
81 * B8 @H-FDD: 900MHz
82 * B12 @H-FDD: 720MHz
83 * B13 @H-FDD: 740MHz
84 * B17 @H-FDD: 730MHz
85 * B18 @H-FDD: 870MHz
86 * B19 @H-FDD: 870MHz
87 * B20 @H-FDD: 790MHz
88 * B25 @H-FDD: 1900MHz
89 * B28 @H-FDD: 750MHz
90 * B66 @H-FDD: 2000MHz
91 * B70 @H-FDD: 2000MHz
92 * B85 @H-FDD: 700MHz
93
94 (% style="color:blue" %)**Battery:**
95
96 * Li/SOCI2 un-chargeable battery
97 * Capacity: 8500mAh
98 * Self Discharge: <1% / Year @ 25°C
99 * Max continuously current: 130mA
100 * Max boost current: 2A, 1 second
101
102 (% style="color:blue" %)**Power Consumption**
103
104 * STOP Mode: 10uA @ 3.3v
105 * Max transmit power: 350mA@3.3v
106
107
108 == 1.4 Suitable Container & Liquid ==
109
110
111 * Solid Wall container such as: steel, iron, glass, ceramics, non-foaming plastics etc.
112 * Container shape is regular, and surface is smooth.
113 * Container Thickness:
114 ** Pure metal material.  2~~8mm, best is 3~~5mm
115 ** Pure non metal material: <10 mm
116 * Pure liquid without irregular deposition.
117
118
119 (% style="display:none" %)
120
121 == 1.5 Install DDS20-NB ==
122
123
124 (% style="color:blue" %)**Step 1**(%%):  ** Choose the installation point.**
125
126 DDS20-NB (% style="color:red" %)**MUST**(%%) be installed on the container bottom middle position.
127
128 [[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"]]
129
130
131 (((
132 (% style="color:blue" %)**Step 2**(%%):  **Polish the installation point.**
133 )))
134
135 (((
136 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.
137 )))
138
139 [[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"]]
140
141
142 No polish needed if the container is shine metal surface without paint or non-metal container.
143
144 [[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"]]
145
146
147 (((
148 (% style="color:blue" %)**Step3:   **(%%)**Test the installation point.**
149 )))
150
151 (((
152 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.
153 )))
154
155 (((
156 It is necessary to put the coupling paste between the sensor and the container, otherwise DDS20-NB won't detect the liquid level.
157 )))
158
159 (((
160 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.
161 )))
162
163
164 (((
165 (% style="color:blue" %)**LED Status:**
166 )))
167
168 * (((
169 **Onboard LED**: When power on device, the onboard LED will fast blink 4 times which means detect the sensor well.
170 )))
171
172 * (((
173 (% 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.
174 )))
175 * (((
176 (% style="color:blue" %)**BLUE LED**(% style="color:red" %)** slowly blinking**(%%): Sensor detects Liquid Level, The installation point is good.
177 )))
178
179 (((
180 DDS20-NB will enter into low power mode at 30 seconds after system reset or power on, Blue LED will be off after that.
181 )))
182
183
184 (((
185 (% 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.
186 )))
187
188
189 (((
190 (% style="color:blue" %)**Step4:   **(%%)**Install use Epoxy ab glue.**
191 )))
192
193 (((
194 Prepare Eproxy AB glue.
195 )))
196
197 (((
198 Put Eproxy AB glue in the sensor and press it hard on the container installation point.
199 )))
200
201 (((
202 Reset DDS20-NB and see if the BLUE LED is slowly blinking.
203 )))
204
205 [[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"]]
206
207 (((
208 (% style="color:red" %)**Note :**(% style="color:red; display:none" %)** **
209
210 (% 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.
211 )))
212
213 (((
214 (% 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.
215 )))
216
217
218 == 1.6 Applications ==
219
220
221 * Smart liquid control solution
222
223 * Smart liquefied gas solution
224
225
226 == 1.7 Precautions ==
227
228
229 * 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.
230
231 * 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.
232
233 * 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.
234
235 (% style="display:none" %)
236
237
238
239 == 1.8 Sleep mode and working mode ==
240
241
242 (% 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.
243
244 (% 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.
245
246
247 == 1.9 Button & LEDs ==
248
249
250 [[image:Main.User Manual for LoRaWAN End Nodes.D20-LBD22-LBD23-LB_LoRaWAN_Temperature_Sensor_User_Manual.WebHome@1675071855856-879.png]]
251
252
253 (% border="1" cellspacing="4" style="background-color:#f2f2f2; width:510px" %)
254 |=(% 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**
255 |(% style="width:167px" %)Pressing ACT between 1s < time < 3s|(% style="width:117px" %)Send an uplink|(% style="width:225px" %)(((
256 If sensor has already attached to NB-IoT network, sensor will send an uplink packet, (% style="color:blue" %)**blue led** (%%)will blink once.
257 Meanwhile, BLE module will be active and user can connect via BLE to configure device.
258 )))
259 |(% style="width:167px" %)Pressing ACT for more than 3s|(% style="width:117px" %)Active Device|(% style="width:225px" %)(((
260 (% 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.
261 (% style="color:green" %)**Green led**(%%) will solidly turn on for 5 seconds after joined in network.
262 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.
263 )))
264 |(% 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.
265
266
267 == 1.10 BLE connection ==
268
269
270 DDS20-NB support BLE remote configure and firmware update.
271
272
273 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:
274
275 * Press button to send an uplink
276 * Press button to active device.
277 * Device Power on or reset.
278
279 If there is no activity connection on BLE in 60 seconds, sensor will shut down BLE module to enter low power mode.
280
281
282 == 1.11 Pin Definitions & Switch ==
283
284
285 [[image:image-20230819104805-5.png]]
286
287
288 === 1.11.1 Jumper JP2 ===
289
290
291 Power on Device when put this jumper.
292
293
294 === 1.11.2 BOOT MODE / SW1 ===
295
296
297 **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.
298
299 **2)** (% style="color:blue" %)**Flash**(%%): work mode, device starts to work and send out console output for further debug
300
301
302 === 1.11.3 Reset Button ===
303
304
305 Press to reboot the device.
306
307 (% style="display:none" %)
308
309
310 == 1.12 Mechanical ==
311
312
313 [[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"]]
314
315 [[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"]]
316
317 [[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"]]
318
319
320 (% style="color:blue" %)**Probe Mechanical:**
321
322 [[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"]]
323
324 [[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"]]
325
326
327 = 2. Use DDS20-NB to communicate with IoT Server =
328
329 == 2.1 Send data to IoT server via NB-IoT network ==
330
331
332 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.
333
334
335 Below shows the network structure:
336
337 [[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"]]
338
339
340 There are two version: (% style="color:blue" %)**-GE**(%%) and (% style="color:blue" %)**-1D**(%%) version of DDS20-NB.
341
342
343 (% 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.
344
345 * 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]].
346
347 * 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]]. 
348
349 Below shows result of different server as a glance.
350
351 (% border="1" cellspacing="4" style="width:515px" %)
352 |(% 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**
353 |(% 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" %)(((
354 (% style="text-align:center" %)
355 [[image:image-20230819113244-8.png||height="183" width="367"]]
356 )))|(% style="width:170px" %)
357 |(% 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" %)(((
358 (% style="text-align:center" %)
359 [[image:image-20230819113244-9.png||height="119" width="367"]]
360 )))|(% style="width:170px" %)
361 |(% 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" %)
362 |(% 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" %)
363 |(% 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" %)
364 |(% 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" %)(((
365 (% style="text-align:center" %)
366 [[image:image-20230819113244-10.png||height="104" width="367"]]
367 )))|(% style="width:170px" %)
368 |(% 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" %)(((
369 (% style="text-align:center" %)
370 [[image:image-20230819113244-11.png||height="141" width="367"]]
371 )))|(% style="width:170px" %)
372
373 (% 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]].
374
375
376 == 2.2 ​Payload Types ==
377
378
379 To meet different server requirement, DDS20-NB supports different payload type.
380
381 **Includes:**
382
383 * [[General JSON format payload>>||anchor="H2.2.1GeneralJsonFormat28Type3D529"]]. (Type=5)
384
385 * [[HEX format Payload>>||anchor="H2.2.2HEXformatPayload28Type3D029"]]. (Type=0)
386
387 * [[ThingSpeak Format>>||anchor="H2.2.4ThingSpeakPayload28Type3D129"]]. (Type=1)
388
389 * [[ThingsBoard Format>>||anchor="H2.2.3ThingsBoardPayload28Type3D329"]]. (Type=3)
390
391 User can specify the payload type when choose the connection protocol. Example:
392
393 (% style="color:#037691" %)**AT+PRO=2,0**  (%%) ~/~/ Use UDP Connection & hex Payload
394
395 (% style="color:#037691" %)**AT+PRO=2,5**   (%%) ~/~/ Use UDP Connection & Json Payload
396
397 (% style="color:#037691" %)**AT+PRO=3,5 ** (%%) ~/~/ Use MQTT Connection & Json Payload
398
399
400 === 2.2.1 General Json Format(Type~=5) ===
401
402
403 This is the General Json Format. As below:
404
405 (% 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}}**
406
407
408 (% style="color:red" %)**Notice, from above payload:**
409
410 * Temperature , Humidity , Battery & Signal are the value at uplink time.
411
412 * 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.
413
414
415 === 2.2.2 HEX format Payload(Type~=0) ===
416
417
418 This is the HEX Format. As below:
419
420 (% style="color:#4472c4" %)**f86620705346276200640cba16010000000011011801e864d49c2d011a01e364d49925011901eb64d49871011901e564d497bd011a01e664d49709011901e964d49655011a01e864d495a1011a01e864d494ed011801e864d49439**
421
422 [[image:1692424009971-458.png]]
423
424
425 (% style="color:blue" %)**Version:**
426
427 These bytes include the hardware and software version.
428
429 (% style="color:#037691" %)**Higher byte:**(%%) Specify Sensor Model: 0x00 for DDS20-NB
430
431 (% style="color:#037691" %)**Lower byte:**(%%) Specify the software version: 0x64=100, means firmware version 100
432
433
434 (% style="color:blue" %)**BAT (Battery Info):**
435
436 Ex1: 0x0CBA = 3258mV
437
438
439 (% style="color:blue" %)**Signal Strength:**
440
441 NB-IoT Network signal Strength.
442
443 **Ex1: 0x16 = 22**
444
445 **0**  -113dBm or less
446
447 **1**  -111dBm
448
449 **2...30** -109dBm... -53dBm
450
451 **31**   -51dBm or greater
452
453 **99**    Not known or not detectable
454
455
456 (% style="color:blue" %)**TimeStamp:   **
457
458 Unit TimeStamp Example: 64d49439(H) = 1691653177(D)
459
460 Put the decimal value into this link(https:~/~/www.epochconverter.com/) to get the time.
461
462
463 === 2.2.3 ThingsBoard Payload(Type~=3) ===
464
465
466 Type3 payload special design for ThingsBoard, it will also configure other default server to ThingsBoard.
467
468 (% style="color:#4472c4" %)**{"IMEI":866207053462762,"temperature":29.2,"humidity":54.2,"battery":3.27,"signal":24}**
469
470
471 === 2.2.4 ThingSpeak Payload(Type~=1) ===
472
473
474 This payload meets ThingSpeak platform requirement. It includes only four fields. Form 1~~4 are:
475
476 Temperature, Humidity, Battery & Signal. This payload type only valid for ThingsSpeak Platform
477
478 As below:
479
480 (% style="color:#4472c4" %)**field1=27.9&field2=49.9&field3=3.23&field4=28**
481
482
483 == 2.3  ​Uplink Payload ==
484
485
486 (((
487 DDS20-NB will uplink payload via LoRaWAN with below payload format: 
488 )))
489
490 (((
491 Uplink payload includes in total 8 bytes.
492 )))
493
494 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:510px" %)
495 |=(% 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
496 |(% style="width:95px" %)Value|(% style="width:61px" %)[[BAT>>||anchor="H2.3.1A0BatteryInfo"]]|(((
497 [[Distance>>||anchor="H2.3.2A0Distance"]]
498 (unit: mm)
499 )))|[[Digital Interrupt (Optional)>>||anchor="H2.3.3A0InterruptPin"]]|(((
500 [[Temperature (Optional)>>||anchor="H2.3.4A0DS18B20Temperaturesensor"]]
501 )))|[[Sensor Flag>>||anchor="H2.3.5A0SensorFlag"]]
502
503 [[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"]]
504
505
506 === 2.3.1  Battery Info ===
507
508
509 Check the battery voltage for DDS20-NB.
510
511 Ex1: 0x0B45 = 2885mV
512
513 Ex2: 0x0B49 = 2889mV
514
515
516 === 2.3.2  Distance ===
517
518
519 (((
520 Get the distance. Flat object range 20mm - 2000mm.
521 )))
522
523 (((
524 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" %)** **
525
526 (% style="color:blue" %)**0605(H) = 1541 (D) = 1541 mm.**
527 )))
528
529 * If the sensor value is 0x0000, it means system doesn't detect ultrasonic sensor.
530
531 * If the sensor value lower than 0x0014 (20mm), the sensor value will be invalid.
532
533
534 === 2.3.3  Interrupt Pin ===
535
536
537 This data field shows if this packet is generated by interrupt or not.
538
539 **Example:**
540
541 0x00: Normal uplink packet.
542
543 0x01: Interrupt Uplink Packet.
544
545
546 === 2.3.4  DS18B20 Temperature sensor ===
547
548
549 This is optional, user can connect external DS18B20 sensor to the +3.3v, 1-wire and GND pin . and this field will report temperature.
550
551 **Example**:
552
553 If payload is: 0105H:  (0105 & FC00 == 0), temp = 0105H /10 = 26.1 degree
554
555 If payload is: FF3FH :  (FF3F & FC00 == 1) , temp = (FF3FH - 65536)/10 = -19.3 degrees.
556
557
558 === 2.3.5  Sensor Flag ===
559
560
561 (((
562 0x01: Detect Ultrasonic Sensor
563 )))
564
565 (((
566 0x00: No Ultrasonic Sensor
567
568
569 )))
570
571 == 2.4 Test Uplink and Change Update Interval ==
572
573
574 By default, Sensor will send uplinks (% style="color:blue" %)**every 2 hours**(%%) & AT+NOUD=8
575
576 User can use below commands to change the (% style="color:blue" %)**uplink interval**.
577
578 (% style="color:#037691" %)**AT+TDC=600 ** (%%) ~/~/ Set Update Interval to 600s
579
580 User can also push the button for more than 1 seconds to activate an uplink.
581
582
583 == 2.5 Multi-Samplings and One uplink ==
584
585
586 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:
587
588 * (% 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)
589
590 * (% 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.
591
592 The diagram below explains the relationship between TR, NOUD, and TDC more clearly:
593
594 [[image:1692424376354-959.png]]
595
596
597 == 2.6 Trggier an uplink by external interrupt ==
598
599
600 DDS20-NB has an external trigger interrupt function. Users can use the PB15 pin to trigger the upload of data packets.
601
602 (% style="color:blue" %)**AT command:**
603
604 * (% style="color:#037691" %)**AT+INTMOD **(%%) ~/~/ Set the trigger interrupt mode
605
606 * (% style="color:#037691" %)**AT+INTMOD=0 **(%%) ~/~/ Disable Interrupt
607
608 * (% style="color:#037691" %)**AT+INTMOD=1 **(%%) ~/~/ Trigger by rising and falling edge
609
610 * (% style="color:#037691" %)**AT+INTMOD=2 **(%%) ~/~/ Trigger by falling edge
611
612 * (% style="color:#037691" %)**AT+INTMOD=3  **(%%) ~/~/ Trigger by rising edge
613
614
615 = 3. Configure DDS20-NB =
616
617 == 3.1 Configure Methods ==
618
619
620 DDS20-NB supports below configure method:
621
622 * AT Command via Bluetooth Connection (**Recommended**): [[BLE Configure Instruction>>http://wiki.dragino.com/xwiki/bin/view/Main/BLE%20Bluetooth%20Remote%20Configure/]].
623
624 * 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]].
625
626
627 == 3.2 AT Commands Set ==
628
629
630 AT+<CMD>?        : Help on <CMD>
631
632 AT+<CMD>         : Run <CMD>
633
634 AT+<CMD>=<value> : Set the value
635
636 AT+<CMD>=?       : Get the value
637
638
639 (% style="color:blue" %)**General Commands**      
640
641 AT                    : Attention       
642
643 AT?  : Short Help     
644
645 ATZ  : MCU Reset    
646
647 AT+TDC  : Application Data Transmission Interval
648
649 AT+CFG  : Print all configurations
650
651 AT+CFGMOD           : Working mode selection
652
653 AT+DEUI  : Get or set the Device ID
654
655 AT+INTMOD            : Set the trigger interrupt mode
656
657 AT+5VT           : Set extend the time of 5V power  
658
659 AT+PRO          : Choose agreement
660
661 AT+RXDL  : Extend the sending and receiving time
662
663 AT+DNSCFG  : Get or Set DNS Server
664
665 AT+GETSENSORVALUE   : Returns the current sensor measurement
666
667 AT+NOUD  : Get or Set the number of data to be uploaded
668
669 AT+CDP     : Read or Clear cached data
670
671 AT+SHTEMP:  Get or Set alarm of temp
672
673 AT+SHHUM:  Get or Set alarm of moisture
674
675 AT+SERVADDR :  Server Address
676
677
678 (% style="color:blue" %)**UDP Management**
679
680 AT+CFM  :  Upload confirmation mode (only valid for UDP)
681
682
683 (% style="color:blue" %)**MQTT Management**
684
685 AT+CLIENT               : Get or Set MQTT client
686
687 AT+UNAME              : Get or Set MQTT Username
688
689 AT+PWD                  : Get or Set MQTT password
690
691 AT+PUBTOPIC  : Get or Set MQTT publish topic
692
693 AT+SUBTOPIC  : Get or Set MQTT subscription topic
694
695
696 (% style="color:blue" %)**Information**          
697
698 AT+FDR  : Factory Data Reset
699
700 AT+PWORD  : Serial Access Password
701
702 AT+LDATA  : Get the last upload data
703
704 AT+CDP  : Read or Clear cached data
705
706
707 = 4. Battery & Power Consumption =
708
709
710 DDS20-NB use ER26500 + SPC1520 battery pack. See below link for detail information about the battery info and how to replace.
711
712 [[**Battery Info & Power Consumption Analyze**>>http://wiki.dragino.com/xwiki/bin/view/Main/How%20to%20calculate%20the%20battery%20life%20of%20Dragino%20sensors%3F/]] .
713
714
715 = 5. Firmware update =
716
717
718 User can change device firmware to::
719
720 * Update with new features.
721
722 * Fix bugs.
723
724 Firmware and changelog can be downloaded from : **[[Firmware download link>>https://www.dropbox.com/sh/nyzeu0lf0amcaek/AAC6UZrqyTcAyJgXOH7l9F9Ka?dl=0]]**
725
726 Methods to Update Firmware:
727
728 * (Recommended way) OTA firmware update via BLE: [[**Instruction**>>url:http://wiki.dragino.com/xwiki/bin/view/Main/BLE_Firmware_Update_NB_Sensors_BC660K-GL/]].
729
730 * 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]]**.
731
732
733 = 6. FAQ =
734
735 == 6.1 How can I access t BC660K-GL AT Commands? ==
736
737
738 User can access to BC660K-GL directly and send AT Commands.
739
740 [[See BC660K-GL AT Command set>>url:https://www.dropbox.com/sh/5f6ssda5fum8rvs/AABT68l8ZzWOvZ5eg2qwOoFda?dl=0]]
741
742
743 = 7.  Trouble Shooting =
744
745 == 7.1  Why i always see 0x0000 or 0 for the distance value? ==
746
747
748 (((
749 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.
750
751 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.
752
753
754 )))
755
756 = 8. Order Info =
757
758
759 Part Number: (% style="color:blue" %)**DDS20-NB-XX**
760
761 (% style="color:red" %)**XX**(%%):
762
763 * (% style="color:#037691" %)**GE**(%%): General version ( Exclude SIM card)
764
765 * (% style="color:#037691" %)**1D**(%%): with 1NCE* 10 years 500MB SIM card and Pre-configure to DataCake server
766
767 (% 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
768
769
770 = 9. ​Packing Info =
771
772
773 (% style="color:#037691" %)**Package Includes**:
774
775 * DDS20-NB NB-IoT Ultrasonic liquid level sensor x 1
776
777 * External antenna x 1
778
779 (% style="color:#037691" %)**Dimension and weight**:
780
781 * Device Size: 13.0 x 5 x 4.5 cm
782
783 * Device Weight: 150g
784
785 * Package Size / pcs : 14.0 x 8x 5 cm
786
787 * Weight / pcs : 180g
788
789
790 = 10. Support =
791
792
793 * 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.
794
795 * 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]].
796
797 (% style="display:none" %) (%%)