Last modified by Mengting Qiu on 2024/04/02 17:03
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From version < 83.8 >
edited by Xiaoling
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To version < 90.2 >
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1 1  (% style="text-align:center" %)
2 -[[image:LMDS200_10.jpg]]
2 +[[image:LMDS200_10.jpg||height="572" width="572"]]
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5 5  **Table of Contents：**
6 6  
7 7  {{toc/}}
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9 9  
10 10  
11 11  
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12 12  = 1.  Introduction =
13 13  
14 14  == 1.1 ​ What is NMDS200 NB-IoT Microwave Radar Distance Sensor ==
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16 16  
17 17  (((
18 18  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.
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19 19  
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20 20  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.
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21 21  
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22 22  NMDS200 can (% style="color:blue" %)**measure two distances**(%%): the closest object and next object behind the closest one.
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23 23  
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24 24  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.
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25 25  
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26 26  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.
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27 27  
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28 28  NMDS200 (% style="color:blue" %)**supports different uplink**(%%) methods including (% style="color:blue" %)**TCP, MQTT, UDP, and CoAP**(%%) for different application requirements.
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29 29  
55 +(((
30 30  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)
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31 31  
59 +(((
32 32  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.
33 33  )))
34 34  
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50 50  * Micro SIM card slot for NB-IoT SIM
51 51  * 8500mAh Battery for long-term use
52 52  
81 +
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53 53  == 1.3 Radar probe specification ==
54 54  
55 55  
56 56  * Measuring Method: FMCW
57 -* Frequency: 24.000 24.500 GHz
87 +* Frequency: 24.000 ~~ 24.500 GHz
58 58  * Measurement output power: 6dBm
59 -* Measure range: 0.5 20m
89 +* Measure range: 0.5 ~~ 20m
60 60  * Accuracy: ±0.1m
61 61  * Resolution: 0.01m
62 62  * Horizontal Angel: 78°
63 63  * Vertical Angel: 23°
64 64  
95 +
96 +
65 65  == 1.4  Storage Temperature ==
66 66  
67 67  
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81 81  * Sewer
82 82  * Bottom water level monitoring
83 83  
116 +
117 +
84 84  == 1.6  Specification ==
85 85  
86 86  
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98 98  * B20 @H-FDD: 800MHz
99 99  * B28 @H-FDD: 700MHz
100 100  
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101 101  == 1.7  Installation ==
102 102  
103 103  
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104 104  Sensor measure direction and angle is as below. When install the sensor, please make sure the sensor direct to object.
105 105  
106 106  
107 -[[image:image-20221207170748-1.png]] [[image:image-20221207170748-2.png||height="366" width="672"]]
143 +[[image:image-20221207170748-1.png]]
108 108  
109 109  
146 + [[image:image-20221207170748-2.png||height="345" width="634"]]
110 110  
148 +
111 111  == 1.8  Pin Definitions and Switch ==
112 112  
113 113  
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123 123  
124 124  The diagram below shows the working flow in the default firmware of NMDS200:
125 125  
126 -[[image:image-20221021110615-5.png]]
164 +[[image:image-20221021110615-5.png||height="996" width="492"]]
127 127  
128 128  
129 129  == 2.2 ​ Configure NMDS200 ==
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137 137  
138 138  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.
139 139  
140 -[[image:image-20221208090742-1.png]]
178 +[[image:image-20221209090938-1.png]]
141 141  
142 142  
143 143  === 2.2.1 Insert NB-IoT SIM card ===
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186 186  (% 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]]
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188 188  
189 -
190 190  === 2.2.3 Use CoAP protocol to uplink data ===
191 191  
192 192  
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203 203  
204 204  For parameter description, please refer to AT command set
205 205  
206 -[[image:image-20221021110948-8.png]]
243 +[[image:1670471530120-960.png||height="647" width="674"]]
207 207  
208 208  
209 209  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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222 222  
223 223  * (% style="color:#037691" %)**AT+CFM=1       ** (%%) ~/~/  If the server does not respond, this command is unnecessary
224 224  
225 -​ [[image:image-20221021111025-10.png]]
262 +​ [[image:1670471559211-638.png]]
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227 227  
228 228  [[image:image-20221021111033-11.png||height="241" width="576"]]
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248 248  
249 249  * (% style="color:#037691" %)**AT+SUBTOPIC=NSE01_SUB          ** (%%) ~/~/  Set the subscription topic of MQTT
250 250  
251 -​ [[image:image-20221118103445-7.png]]
288 +​ [[image:1670471584490-640.png]]
252 252  
253 253  
254 254  [[image:1670405928926-116.png]]
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267 267  
268 268  * (% style="color:#037691" %)**AT+SERVADDR=120.24.4.116,5600   ** (%%) ~/~/  Set TCP server address and port
269 269  
270 -​ [[image:1670406036256-101.png||height="676" width="713"]]
307 +​ [[image:1670471613823-833.png]]
271 271  
272 272  
273 273  [[image:image-20221021111131-15.png]]
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298 298  |=(% 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**
299 299  |=(% 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"]]
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301 -(% border="1" style="background-color:#ffffcc; color:green; width:350px" %)
338 +(% border="1" style="background-color:#ffffcc; color:green; width:429px" %)
302 302  |(% style="width:60px" %)**4**|(% style="width:60px" %)**2**|(% style="width:60px" %)**2**|(% style="width:60px" %)**4**|(% style="width:100px" %)(((
303 303  **1-32 group**
304 304  )))
305 -|(% style="width:98px" %)[[Time stamp>>||anchor="H2.4.6A0Timestamp"]]| Distance 1 | Distance  2|(% style="width:67px" %)Time stamp|(% style="width:98px" %)...
342 +|(% style="width:98px" %)[[Time stamp>>||anchor="H2.4.6A0Timestamp"]]| Distance 1 | Distance  2|(% style="width:67px" %)Time stamp|(% style="width:100px" %)...
306 306  
307 307  If we use the MQTT client to subscribe to this MQTT topic, we can see the following information when the NMDS200 uplink data.
308 308  
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458 458  
459 459  (% style="color:#037691" %)**Example 1:**
460 460  
461 -AT+ ALARM1 =60,200  ~/~/ Alarm when moisture lower than 60.
498 +AT+ ALARM1 =60,200  ~/~/ Alarm when distance1 lower than 60.
462 462  
463 463  AT+ ALARM2 =min,max
464 464  
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465 465  
466 466  (% style="color:#037691" %)**Example 2:**
467 467  
468 -AT+ ALARM2 =200,1500  ~/~/ Alarm when temperature lower than 1500
505 +AT+ ALARM2 =200,1500  ~/~/ Alarm when distance2 lower than 1500.
469 469  
470 470  
471 471  == 2.8  Set the number of data to be uploaded and the recording time ==
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