Last modified by Mengting Qiu on 2024/04/02 17:03
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From version < 88.2 >
edited by Xiaoling
on 2022/12/09 09:14
To version < 83.8 >
edited by Xiaoling
on 2022/12/08 11:29
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Summary

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1 1  (% style="text-align:center" %)
2 -[[image:LMDS200_10.jpg||height="572" width="572"]]
2 +[[image:LMDS200_10.jpg]]
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4 4  
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8 -(% style="display:none" %) (%%)
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12 -
13 -
14 14  **Table of Contents：**
15 15  
16 16  {{toc/}}
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18 18  
19 19  
20 20  
21 -
22 -
23 -
24 -
25 -
26 26  = 1.  Introduction =
27 27  
28 28  == 1.1 ​ What is NMDS200 NB-IoT Microwave Radar Distance Sensor ==
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30 30  
31 31  (((
32 32  The Dragino NMDS200 is a(% style="color:blue" %)** NB-IoT Microwave Radar distance sensor**(%%). It uses (% style="color:blue" %)**24Ghz Microwave**(%%) to detect the distance between sensor and different objects. Compare vs ultrasonic or Lidar measurement method, Microwave Radar is (% style="color:blue" %)**more reliable for condensation / dusty environment**(%%). It can sense correct distance even there is water or thick dust on top of the sensor.
33 -)))
34 34  
35 -(((
36 36  The NMDS200 can be applied to scenarios such as horizontal distance measurement, parking management system, object proximity and presence detection, intelligent trash can management system, robot obstacle avoidance, automatic control, sewer, etc.
37 -)))
38 38  
39 -(((
40 40  NMDS200 can (% style="color:blue" %)**measure two distances**(%%): the closest object and next object behind the closest one.
41 -)))
42 42  
43 -(((
44 44  NMDS200 (% style="color:blue" %)**supports Alarm Feature**(%%), user can set the NMDS200 to uplink data in a short interval when the distance is out of configured range.
45 -)))
46 46  
47 -(((
48 48  NarrowBand-Internet of Things (NB-IoT) is a (% style="color:blue" %)**standards-based low power wide area (LPWA) technology**(%%) developed to enable a wide range of new IoT devices and services. NB-IoT significantly improves the power consumption of user devices, system capacity, and spectrum efficiency, especially in deep coverage.
49 -)))
50 50  
51 -(((
52 52  NMDS200 (% style="color:blue" %)**supports different uplink**(%%) methods including (% style="color:blue" %)**TCP, MQTT, UDP, and CoAP**(%%) for different application requirements.
53 -)))
54 54  
55 -(((
56 56  NMDS200 is powered by (% style="color:blue" %)**8500mAh Li-SOCI2 battery**,(%%) It is designed for long-term use of up to 5 years. (Actually Battery life depends on the use environment, update period & uplink method)
57 -)))
58 58  
59 -(((
60 60  To use NMDS200, user needs to check if there is NB-IoT coverage in the field and with the Nb-IoT bands that NMDS200 supports. If local operator support it, user needs to get a** (% style="color:blue" %)NB-IoT SIM card(%%)** from the operator and install into NMDS200 to get NB-IoT network connection.
61 61  )))
62 62  
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78 78  * Micro SIM card slot for NB-IoT SIM
79 79  * 8500mAh Battery for long-term use
80 80  
81 -
82 -
83 83  == 1.3 Radar probe specification ==
84 84  
85 85  
86 86  * Measuring Method: FMCW
87 -* Frequency: 24.000 ~~ 24.500 GHz
57 +* Frequency: 24.000 24.500 GHz
88 88  * Measurement output power: 6dBm
89 -* Measure range: 0.5 ~~ 20m
59 +* Measure range: 0.5 20m
90 90  * Accuracy: ±0.1m
91 91  * Resolution: 0.01m
92 92  * Horizontal Angel: 78°
93 93  * Vertical Angel: 23°
94 94  
95 -
96 -
97 97  == 1.4  Storage Temperature ==
98 98  
99 99  
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113 113  * Sewer
114 114  * Bottom water level monitoring
115 115  
116 -
117 -
118 118  == 1.6  Specification ==
119 119  
120 120  
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132 132  * B20 @H-FDD: 800MHz
133 133  * B28 @H-FDD: 700MHz
134 134  
135 -
136 -
137 137  == 1.7  Installation ==
138 138  
139 139  
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140 140  Sensor measure direction and angle is as below. When install the sensor, please make sure the sensor direct to object.
141 141  
142 142  
143 -[[image:image-20221207170748-1.png]]
107 +[[image:image-20221207170748-1.png]] [[image:image-20221207170748-2.png||height="366" width="672"]]
144 144  
145 145  
146 - [[image:image-20221207170748-2.png||height="345" width="634"]]
147 147  
148 -
149 149  == 1.8  Pin Definitions and Switch ==
150 150  
151 151  
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161 161  
162 162  The diagram below shows the working flow in the default firmware of NMDS200:
163 163  
164 -[[image:image-20221021110615-5.png||height="996" width="492"]]
126 +[[image:image-20221021110615-5.png]]
165 165  
166 166  
167 167  == 2.2 ​ Configure NMDS200 ==
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175 175  
176 176  Below figure shows our testing structure. Here we have NB-IoT network coverage by China Mobile, the band they use is B8.  The NMDS200 will use** (% style="color:red" %)CoAP(120.24.4.116:5683)(%%)** or raw (% style="color:red" %)**UDP(120.24.4.116:5601) **(%%)or (% style="color:red" %)**MQTT(120.24.4.116:1883) **(%%)or (% style="color:red" %)**TCP(120.24.4.116:5600)protocol**(%%) to send data to the test server.
177 177  
178 -[[image:image-20221209090938-1.png]]
140 +[[image:image-20221208090742-1.png]]
179 179  
180 180  
181 181  === 2.2.1 Insert NB-IoT SIM card ===
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224 224  (% style="color:red" %)**Note: the valid AT Commands can be found at:  **(%%)[[**https:~~/~~/www.dropbox.com/sh/351dwor6joz8nwh/AADn1BQaAAxLF_QMyU8NkW47a?dl=0**>>url:https://www.dropbox.com/sh/351dwor6joz8nwh/AADn1BQaAAxLF_QMyU8NkW47a?dl=0]]
225 225  
226 226  
189 +
227 227  === 2.2.3 Use CoAP protocol to uplink data ===
228 228  
229 229  
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240 240  
241 241  For parameter description, please refer to AT command set
242 242  
243 -[[image:1670471530120-960.png||height="647" width="674"]]
206 +[[image:image-20221021110948-8.png]]
244 244  
245 245  
246 246  After configuring the server address and (% style="color:green" %)**reset NMDS200**(%%) (via AT+ATZ ), NMDS200 will start to uplink sensor values to the CoAP server.
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259 259  
260 260  * (% style="color:#037691" %)**AT+CFM=1       ** (%%) ~/~/  If the server does not respond, this command is unnecessary
261 261  
262 -​ [[image:1670471559211-638.png]]
225 +​ [[image:image-20221021111025-10.png]]
263 263  
264 264  
265 265  [[image:image-20221021111033-11.png||height="241" width="576"]]
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285 285  
286 286  * (% style="color:#037691" %)**AT+SUBTOPIC=NSE01_SUB          ** (%%) ~/~/  Set the subscription topic of MQTT
287 287  
288 -​ [[image:1670471584490-640.png]]
251 +​ [[image:image-20221118103445-7.png]]
289 289  
290 290  
291 291  [[image:1670405928926-116.png]]
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304 304  
305 305  * (% style="color:#037691" %)**AT+SERVADDR=120.24.4.116,5600   ** (%%) ~/~/  Set TCP server address and port
306 306  
307 -​ ​​​​​​​[[image:1670471613823-833.png]]
270 +​ [[image:1670406036256-101.png||height="676" width="713"]]
308 308  
309 309  
310 310  [[image:image-20221021111131-15.png]]
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335 335  |=(% scope="row" style="width: 60px;" %)**Size(bytes)**|(% style="width:50px" %)**8**|(% style="width:30px" %)**2**|(% style="width:30px" %)**2**|(% style="width:75px" %)**1**|(% style="width:30px" %)**1**|(% style="width:50px" %)**1**|(% style="width:60px" %)**2**|(% style="width:60px" %)**2**
336 336  |=(% style="width: 93px;" %)**Value**|(% style="width:67px" %)[[Device ID>>||anchor="H2.4.1A0A0DeviceID"]]|(% style="width:40px" %)[[Ver>>||anchor="H2.4.2A0VersionInfo"]]|(% style="width:45px" %)[[BAT>>||anchor="H2.4.3A0BatteryInfo"]]|(% style="width:75px" %)[[Signal Strength>>||anchor="H2.4.4A0SignalStrength"]]|(% style="width:54px" %)MOD|(% style="width:62px" %)Exit flag|(% style="width:94px" %) [[Distance 1>>||anchor="H2.4.5A0Distance"]] |(% style="width:93px" %) [[Distance 2>>||anchor="H2.4.5A0Distance"]]
337 337  
338 -(% border="1" style="background-color:#ffffcc; color:green; width:429px" %)
301 +(% border="1" style="background-color:#ffffcc; color:green; width:350px" %)
339 339  |(% style="width:60px" %)**4**|(% style="width:60px" %)**2**|(% style="width:60px" %)**2**|(% style="width:60px" %)**4**|(% style="width:100px" %)(((
340 340  **1-32 group**
341 341  )))
342 -|(% style="width:98px" %)[[Time stamp>>||anchor="H2.4.6A0Timestamp"]]| Distance 1 | Distance  2|(% style="width:67px" %)Time stamp|(% style="width:100px" %)...
305 +|(% style="width:98px" %)[[Time stamp>>||anchor="H2.4.6A0Timestamp"]]| Distance 1 | Distance  2|(% style="width:67px" %)Time stamp|(% style="width:98px" %)...
343 343  
344 344  If we use the MQTT client to subscribe to this MQTT topic, we can see the following information when the NMDS200 uplink data.
345 345  
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