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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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22	22	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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26	26	NMDS200 can (% style="color:blue" %)**measure two distances**(%%): the closest object and next object behind the closest one.
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30	30	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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34	34	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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38	38	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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42	42	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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46	46	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.
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64	64	* Micro SIM card slot for NB-IoT SIM
65	65	* 8500mAh Battery for long-term use
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67		-
68		-
69	69	== 1.3 Radar probe specification ==
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72	72	* Measuring Method: FMCW
73		-* Frequency: 24.000 ~~ 24.500 GHz
	57	+* Frequency: 24.000 24.500 GHz
74	74	* Measurement output power: 6dBm
75		-* Measure range: 0.5 ~~ 20m
	59	+* Measure range: 0.5 20m
76	76	* Accuracy: ±0.1m
77	77	* Resolution: 0.01m
78	78	* Horizontal Angel: 78°
79	79	* Vertical Angel: 23°
80	80
81		-
82		-
83	83	== 1.4  Storage Temperature ==
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85	85
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99	99	* Sewer
100	100	* Bottom water level monitoring
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102		-
103		-
104	104	== 1.6  Specification ==
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118	118	* B20 @H-FDD: 800MHz
119	119	* B28 @H-FDD: 700MHz
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121		-
122		-
123	123	== 1.7  Installation ==
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126	126	Sensor measure direction and angle is as below. When install the sensor, please make sure the sensor direct to object.
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129		-[[image:image-20221207170748-1.png]]
	107	+[[image:image-20221207170748-1.png]] [[image:image-20221207170748-2.png||height="366" width="672"]]
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132		- [[image:image-20221207170748-2.png||height="345" width="634"]]
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136	136	== 1.8  Pin Definitions and Switch ==
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149	149	The diagram below shows the working flow in the default firmware of NMDS200:
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151		-[[image:image-20221021110615-5.png||height="996" width="492"]]
	126	+[[image:image-20221021110615-5.png]]
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153	153
154	154	== 2.2 ​ Configure NMDS200 ==
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211	211	(% 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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	189	+
214	214	=== 2.2.3 Use CoAP protocol to uplink data ===
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322	322	|=(% 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**
323	323	|=(% 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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325		-(% border="1" style="background-color:#ffffcc; color:green; width:429px" %)
	301	+(% border="1" style="background-color:#ffffcc; color:green; width:350px" %)
326	326	|(% style="width:60px" %)**4**|(% style="width:60px" %)**2**|(% style="width:60px" %)**2**|(% style="width:60px" %)**4**|(% style="width:100px" %)(((
327	327	**1-32 group**
328	328	)))
329		-|(% 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" %)...
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331	331	If we use the MQTT client to subscribe to this MQTT topic, we can see the following information when the NMDS200 uplink data.
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