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Summary

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Page properties
Title
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1 -DDS20-NB -- NB-IoT Ultrasonic Liquid Level Sensor User Manual
1 +DDS45-NB -- NB-IoT Distance Detection Sensor User Manual
Content
... ... @@ -1,7 +1,14 @@
1 1  (% style="text-align:center" %)
2 -[[image:image-20230911134259-1.png||height="570" width="570"]]
2 +[[image:image-20230912085600-1.png||height="519" width="731"]]
3 3  
4 4  
5 +
6 +
7 +
8 +
9 +
10 +
11 +
5 5  **Table of Contents:**
6 6  
7 7  {{toc/}}
... ... @@ -13,36 +13,33 @@
13 13  
14 14  = 1. Introduction =
15 15  
16 -== 1.1 What is DDS20-NB NB-IoT Ultrasonic liquid level Sensor ==
23 +== 1.1 What is DDS45-NB NB-IoT Distance Detection Sensor ==
17 17  
18 18  
19 -The Dragino DDS20-NB is a (% style="color:blue" %)**NB-IoT Ultrasonic liquid level sensor**(%%) for Internet of Things solution. It uses (% style="color:blue" %)**none-contact method **(%%)to measure the (% style="color:blue" %)**height of liquid**(%%) in a container without opening the container, and send IoT platform via NB-IoT network.
26 +The Dragino DDS45-NB is a (% style="color:blue" %)** NB-IoT Distance Detection Sensor**(%%) for Internet of Things solution. It is used to measure the distance between the sensor and a flat object. The distance detection sensor is a module that uses (% style="color:blue" %)** ultrasonic sensing technology**(%%) for distance measurement, and (% style="color:blue" %)** temperature compensation**(%%) is performed internally to improve the reliability of data. The DDS45-NB can be applied to scenarios such as horizontal distance measurement, liquid level measurement, parking management system, object proximity and presence detection, intelligent trash can management system, robot obstacle avoidance, automatic control, sewer, bottom water level monitoring, etc.
20 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. 
28 +It detects the distance (% style="color:blue" %)** between the measured object and the sensor**(%%), and and send IoT platform via NB-IoT network.
22 22  
23 -DDS20-NB uses (% style="color:blue" %)**ultrasonic sensing technology**(%%) for distance measurement. DDS20-NB is of high accuracy to measure various liquid such as: (% style="color:blue" %)**toxic substances**, **strong acids**, **strong alkalis**(%%) and (% style="color:blue" %)**various pure liquids**(%%) in high-temperature and high-pressure airtight containers.
30 +DDS45-NB supports different uplink methods including (% style="color:blue" %)**MQTT, MQTTs, UDP & TCP**(%%) for different application requirement, and support uplinks to various IoT Servers.
24 24  
25 -DDS20-NB supports different uplink methods including (% style="color:blue" %)**MQTT, MQTTs, UDP & TCP**(%%) for different application requirement, and support uplinks to various IoT Servers.
32 +DDS45-NB (% style="color:blue" %)**supports BLE configure **(%%)and(% style="color:blue" %)** OTA update**(%%) which make user easy to use.
26 26  
27 -DDS20-NB (% style="color:blue" %)**supports BLE configure **(%%)and(% style="color:blue" %)** OTA update**(%%) which make user easy to use.
34 +DDS45-NB is powered by (% style="color:blue" %)**8500mAh Li-SOCI2 battery**(%%), it is designed for long-term use up to severa years.
28 28  
29 -DDS20-NB is powered by (% style="color:blue" %)**8500mAh Li-SOCI2 battery**(%%), it is designed for long-term use up to severa years.
36 +DDS45-NB has optional built-in SIM card and default IoT server connection version. Which makes it works with simple configuration.
30 30  
31 -DDS20-NB has optional built-in SIM card and default IoT server connection version. Which makes it works with simple configuration.
38 +[[image:image-20230912102813-2.png||height="320" width="923"]]
32 32  
33 33  
34 -[[image:image-20230911140426-2.png||height="320" width="951"]]
35 -
36 -
37 37  == 1.2 ​Features ==
38 38  
39 39  
40 40  * NB-IoT Bands: B1/B2/B3/B4/B5/B8/B12/B13/B17/B18/B19/B20/B25/B28/B66/B70/B85 @H-FDD
41 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 +* Distance Detection by Ultrasonic technology
47 +* Flat object range 30mm - 4500mm
48 +* Accuracy: ±(1cm+S*0.3%) (S: Distance)
49 +* Measure Angle: 60°
46 46  * Multiply Sampling and one uplink
47 47  * Support Bluetooth v5.1 remote configure and update firmware
48 48  * Uplink on periodically
... ... @@ -96,144 +96,64 @@
96 96  * STOP Mode: 10uA @ 3.3v
97 97  * Max transmit power: 350mA@3.3v
98 98  
99 -== 1.4 Suitable Container & Liquid ==
103 +== 1.4 Rated environmental conditions ==
100 100  
101 101  
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.
106 +(% border="1" cellspacing="5" style="background-color:#f2f2f2; width:500px" %)
107 +|(% style="background-color:#4f81bd; color:white; width:163px" %)**Item**|(% style="background-color:#4f81bd; color:white; width:90px" %)**Minimum value**|(% style="background-color:#4f81bd; color:white; width:70px" %)**Typical value**|(% style="background-color:#4f81bd; color:white; width:87px" %)**Maximum value**|(% style="background-color:#4f81bd; color:white; width:40px" %)**Unit**|(% style="background-color:#4f81bd; color:white; width:50px" %)**Remarks**
108 +|(% style="width:174px" %)Storage temperature|(% style="width:86px" %)-25|(% style="width:66px" %)25|(% style="width:90px" %)80|(% style="width:48px" %)℃|(% style="width:203px" %)
109 +|(% style="width:174px" %)Storage humidity|(% style="width:86px" %) |(% style="width:66px" %)65%|(% style="width:90px" %)90%|(% style="width:48px" %)RH|(% style="width:203px" %)(1)
110 +|(% style="width:174px" %)Operating temperature|(% style="width:86px" %)-15|(% style="width:66px" %)25|(% style="width:90px" %)60|(% style="width:48px" %)℃|(% style="width:203px" %)
111 +|(% style="width:174px" %)Working humidity|(% style="width:86px" %)(((
112 +
108 108  
109 -(% style="display:none" %)
114 +
115 +)))|(% style="width:66px" %)65%|(% style="width:90px" %)80%|(% style="width:48px" %)RH|(% style="width:203px" %)(1)
110 110  
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 -
121 121  (((
122 -(% style="color:blue" %)**Step 2**(%%):  **Polish the installation point.**
123 -)))
118 +(% style="color:red" %)**Remarks: (1) a. When the ambient temperature is 0-39 ℃, the maximum humidity is 90% (non-condensing);       **
124 124  
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 -)))
120 +(% style="color:red" %)** b. When the ambient temperature is 40-50 ℃, the highest humidity is the highest humidity in the natural world at the current temperature (no condensation)**
128 128  
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.**
122 +
139 139  )))
140 140  
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 -)))
125 +== 1.5 Effective measurement range Reference beam pattern ==
144 144  
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 -)))
148 148  
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 -)))
128 +(% style="color:blue" %)**1. The tested object is a white cylindrical tube made of PVC, with a height of 100cm and a diameter of 7.5cm.**
152 152  
130 +[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LDDS75%20-%20LoRaWAN%20Distance%20Detection%20Sensor%20User%20Manual/WebHome/1654852253176-749.png?rev=1.1||alt="1654852253176-749.png"]]
153 153  
154 -(((
155 -(% style="color:blue" %)**LED Status:**
156 -)))
157 157  
158 -* (((
159 -**Onboard LED**: When power on device, the onboard LED will fast blink 4 times which means detect the sensor well.
160 -)))
133 +(% style="color:blue" %)**2. The object to be tested is a "corrugated cardboard box" perpendicular to the central axis of 0 °, and the length * width is 60cm * 50cm.**
161 161  
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 -)))
135 +[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LDDS75%20-%20LoRaWAN%20Distance%20Detection%20Sensor%20User%20Manual/WebHome/1654852175653-550.png?rev=1.1||alt="1654852175653-550.png"]]
168 168  
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 -)))
172 172  
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 -
208 208  == 1.6 Applications ==
209 209  
210 210  
211 -* Smart liquid control solution
141 +* Horizontal distance measurement
142 +* Liquid level measurement
143 +* Parking management system
144 +* Object proximity and presence detection
145 +* Intelligent trash can management system
146 +* Robot obstacle avoidance
147 +* Automatic control
148 +* Sewer
149 +* Bottom water level monitoring
212 212  
213 -* Smart liquefied gas solution
214 214  
215 -== 1.7 Precautions ==
152 +== 1.7 Sleep mode and working mode ==
216 216  
217 217  
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 -
231 231  (% 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.
232 232  
233 233  (% 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.
234 234  
235 235  
236 -== 1.9 Button & LEDs ==
160 +== 1.8 Button & LEDs ==
237 237  
238 238  
239 239  [[image:Main.User Manual for LoRaWAN End Nodes.D20-LBD22-LBD23-LB_LoRaWAN_Temperature_Sensor_User_Manual.WebHome@1675071855856-879.png]]
... ... @@ -295,6 +295,23 @@
295 295  (% style="display:none" %)
296 296  
297 297  
222 +== 1.12 Mechanical ==
223 +
224 +
225 +[[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"]]
226 +
227 +[[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"]]
228 +
229 +[[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"]]
230 +
231 +
232 +(% style="color:blue" %)**Probe Mechanical:**
233 +
234 +[[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"]]
235 +
236 +[[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"]]
237 +
238 +
298 298  = 2. Use DDS20-NB to communicate with IoT Server =
299 299  
300 300  == 2.1 Send data to IoT server via NB-IoT network ==
... ... @@ -305,10 +305,10 @@
305 305  
306 306  Below shows the network structure:
307 307  
308 -[[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"]]
249 +[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/DDS45-NB_NB-IoT_Distance_Detection_Sensor_User_Manual/WebHome/image-20230912102813-2.png?width=923&height=320&rev=1.1||alt="image-20230912102813-2.png"]]
309 309  
310 310  
311 -There are two version: (% style="color:blue" %)**-GE**(%%) and (% style="color:blue" %)**-1D**(%%) version of DDS20-NB.
252 +There are two version: (% style="color:blue" %)**-GE**(%%) and (% style="color:blue" %)**-1D**(%%) version of DDS45-NB.
312 312  
313 313  
314 314  (% style="color:blue" %)**GE Version**(%%): This version doesn't include SIM card or point to any IoT server. User needs to use AT Commands to configure below two steps to set DDS20-NB send data to IoT server.
... ... @@ -450,9 +450,96 @@
450 450  (% style="color:#4472c4" %)**field1=27.9&field2=49.9&field3=3.23&field4=28**
451 451  
452 452  
453 -== 2.3 Test Uplink and Change Update Interval ==
394 +== 2.3  Uplink Payload ==
454 454  
455 455  
397 +(((
398 +DDS20-NB will uplink payload via LoRaWAN with below payload format: 
399 +)))
400 +
401 +(((
402 +Uplink payload includes in total 8 bytes.
403 +)))
404 +
405 +(% border="1" cellspacing="5" style="background-color:#f2f2f2; width:510px" %)
406 +|=(% 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
407 +|(% style="width:95px" %)Value|(% style="width:61px" %)[[BAT>>||anchor="H2.3.1A0BatteryInfo"]]|(((
408 +[[Distance>>||anchor="H2.3.2A0Distance"]]
409 +(unit: mm)
410 +)))|[[Digital Interrupt (Optional)>>||anchor="H2.3.3A0InterruptPin"]]|(((
411 +[[Temperature (Optional)>>||anchor="H2.3.4A0DS18B20Temperaturesensor"]]
412 +)))|[[Sensor Flag>>||anchor="H2.3.5A0SensorFlag"]]
413 +
414 +[[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"]]
415 +
416 +
417 +=== 2.3.1  Battery Info ===
418 +
419 +
420 +Check the battery voltage for DDS20-NB.
421 +
422 +Ex1: 0x0B45 = 2885mV
423 +
424 +Ex2: 0x0B49 = 2889mV
425 +
426 +
427 +=== 2.3.2  Distance ===
428 +
429 +
430 +(((
431 +Get the distance. Flat object range 20mm - 2000mm.
432 +)))
433 +
434 +(((
435 +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" %)** **
436 +
437 +(% style="color:blue" %)**0605(H) = 1541 (D) = 1541 mm.**
438 +)))
439 +
440 +* If the sensor value is 0x0000, it means system doesn't detect ultrasonic sensor.
441 +
442 +* If the sensor value lower than 0x0014 (20mm), the sensor value will be invalid.
443 +
444 +=== 2.3.3  Interrupt Pin ===
445 +
446 +
447 +This data field shows if this packet is generated by interrupt or not.
448 +
449 +**Example:**
450 +
451 +0x00: Normal uplink packet.
452 +
453 +0x01: Interrupt Uplink Packet.
454 +
455 +
456 +=== 2.3.4  DS18B20 Temperature sensor ===
457 +
458 +
459 +This is optional, user can connect external DS18B20 sensor to the +3.3v, 1-wire and GND pin . and this field will report temperature.
460 +
461 +**Example**:
462 +
463 +If payload is: 0105H:  (0105 & FC00 == 0), temp = 0105H /10 = 26.1 degree
464 +
465 +If payload is: FF3FH :  (FF3F & FC00 == 1) , temp = (FF3FH - 65536)/10 = -19.3 degrees.
466 +
467 +
468 +=== 2.3.5  Sensor Flag ===
469 +
470 +
471 +(((
472 +0x01: Detect Ultrasonic Sensor
473 +)))
474 +
475 +(((
476 +0x00: No Ultrasonic Sensor
477 +
478 +
479 +)))
480 +
481 +== 2.4 Test Uplink and Change Update Interval ==
482 +
483 +
456 456  By default, Sensor will send uplinks (% style="color:blue" %)**every 2 hours**(%%) & AT+NOUD=8
457 457  
458 458  User can use below commands to change the (% style="color:blue" %)**uplink interval**.
... ... @@ -462,7 +462,7 @@
462 462  User can also push the button for more than 1 seconds to activate an uplink.
463 463  
464 464  
465 -== 2.4 Multi-Samplings and One uplink ==
493 +== 2.5 Multi-Samplings and One uplink ==
466 466  
467 467  
468 468  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:
... ... @@ -476,7 +476,7 @@
476 476  [[image:1692424376354-959.png]]
477 477  
478 478  
479 -== 2.5 Trggier an uplink by external interrupt ==
507 +== 2.6 Trggier an uplink by external interrupt ==
480 480  
481 481  
482 482  DDS20-NB has an external trigger interrupt function. Users can use the PB15 pin to trigger the upload of data packets.
... ... @@ -601,7 +601,7 @@
601 601  
602 602  * Fix bugs.
603 603  
604 -Firmware and changelog can be downloaded from : **[[Firmware download link>>https://www.dropbox.com/sh/fhb3uyl4gt6clru/AAAiZVTFcxrfE1JOOyfcgO9ha?dl=0]]**
632 +Firmware and changelog can be downloaded from : **[[Firmware download link>>https://www.dropbox.com/sh/nyzeu0lf0amcaek/AAC6UZrqyTcAyJgXOH7l9F9Ka?dl=0]]**
605 605  
606 606  Methods to Update Firmware:
607 607  
... ... @@ -619,9 +619,22 @@
619 619  [[See BC660K-GL AT Command set>>url:https://www.dropbox.com/sh/5f6ssda5fum8rvs/AABT68l8ZzWOvZ5eg2qwOoFda?dl=0]]
620 620  
621 621  
622 -= 7. Order Info =
650 += 7.  Trouble Shooting =
623 623  
652 +== 7.1  Why i always see 0x0000 or 0 for the distance value? ==
624 624  
654 +
655 +(((
656 +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.
657 +
658 +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.
659 +
660 +
661 +)))
662 +
663 += 8. Order Info =
664 +
665 +
625 625  Part Number: (% style="color:blue" %)**DDS20-NB-XX**
626 626  
627 627  (% style="color:red" %)**XX**(%%):
... ... @@ -633,7 +633,7 @@
633 633  (% 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
634 634  
635 635  
636 -= 8. ​Packing Info =
677 += 9. ​Packing Info =
637 637  
638 638  
639 639  (% style="color:#037691" %)**Package Includes**:
... ... @@ -652,7 +652,7 @@
652 652  
653 653  * Weight / pcs : 180g
654 654  
655 -= 9. Support =
696 += 10. Support =
656 656  
657 657  
658 658  * Support is provided Monday to Friday, from 09:00 to 18:00 GMT+8. Due to different timezones we cannot offer live support. However, your questions will be answered as soon as possible in the before-mentioned schedule.
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