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4	4
5	5	**Table of Contents：**
6	6
7		-{{toc/}}
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10	10
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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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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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24	24
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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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32	32
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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.
47	47	)))
48	48
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64	64	* Micro SIM card slot for NB-IoT SIM
65	65	* 8500mAh Battery for long-term use
66	66
67		-
68		-
69	69	== 1.3 Radar probe specification ==
70	70
71	71
72	72	* Measuring Method: FMCW
73		-* Frequency: 24.000 ~~ 24.500 GHz
	56	+* Frequency: 24.000 24.500 GHz
74	74	* Measurement output power: 6dBm
75		-* Measure range: 0.5 ~~ 20m
	58	+* 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 ==
84	84
85	85
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99	99	* Sewer
100	100	* Bottom water level monitoring
101	101
102		-
103		-
104	104	== 1.6  Specification ==
105	105
106	106
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118	118	* B20 @H-FDD: 800MHz
119	119	* B28 @H-FDD: 700MHz
120	120
121		-
122		-
123	123	== 1.7  Installation ==
124	124
125	125
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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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128	128
129		-[[image:image-20221207170748-1.png]]
	106	+[[image:image-20221207170748-1.png]] [[image:image-20221207170748-2.png||height="366" width="672"]]
130	130
131	131
132		- [[image:image-20221207170748-2.png||height="345" width="634"]]
133	133
134		-
135		-
136	136	== 1.8  Pin Definitions and Switch ==
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138	138
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148	148
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"]]
	125	+[[image:image-20221021110615-5.png]]
152	152
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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	188	+
214	214	=== 2.2.3 Use CoAP protocol to uplink data ===
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318	318	Each time the device uploads a data package. The user can use the AT+NOUD command to upload the recorded data.Up to 32 sets of recorded data can be uploaded.
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320	320
321		-(% border="1" cellspacing="5" style="background-color:#ffffcc; color:green; width:450px" %)
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		-|=(% 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"]]
	296	+(% border="1" cellspacing="5" style="background-color:#ffffcc; color:green; width:510px" %)
	297	+|=(% scope="row" style="width: 50px;" %)**Size(bytes)**|(% style="width:50px" %)**8**|(% style="width:20px" %)**2**|(% style="width:20px" %)**2**|(% style="width:65px" %)**1**|(% style="width:25px" %)**1**|(% style="width:50px" %)**1**|(% style="width:90px" %)**2**|(% style="width:100px" %)**2**
	298	+|=(% 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="H2.4.5A0A0Distance"]] |(% style="width:93px" %) [[Distance  2>>||anchor="H2.4.5A0A0Distance"]]
324	324
325		-(% border="1" style="background-color:#ffffcc; color:green; width:429px" %)
326		-|(% style="width:60px" %)**4**|(% style="width:60px" %)**2**|(% style="width:60px" %)**2**|(% style="width:60px" %)**4**|(% style="width:100px" %)(((
	300	+(% border="1.5" style="background-color:#ffffcc; color:green; width:450px" %)
	301	+|(% style="width:50px" %)**4**|(% style="width:90px" %)**2**|(% style="width:90px" %)**2**|(% style="width:60px" %)**4**|(% style="width:50px" %)(((
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" %)...
	304	+|(% style="width:98px" %)[[Time stamp>>||anchor="H2.4.6A0Timestamp"]]| Distance 1 | Distance  2|(% style="width:67px" %)Time stamp|(% style="width:74px" %)...
330	330
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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492	492	AT+ ALARM2 =200,1500  ~/~/ Alarm when temperature lower than 1500
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494	494
	470	+
	471	+
495	495	== 2.8  Set the number of data to be uploaded and the recording time ==
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619	619
620	620	AT+INTMOD            : Set the trigger interrupt mode
621	621
622		-AT+5VT  : Set extend the time of 5V power
	599	+AT+5VT  : Set extend the time of 5V power
623	623
624		-AT+PRO  : Choose agreement
	601	+AT+PRO  : Choose agreement
625	625
626		-AT+RXDL  : Extend the sending and receiving time
	603	+AT+RXDL  : Extend the sending and receiving time
627	627
628		-AT+SERVADDR  : Server Address
	605	+AT+SERVADDR  : Server Address
629	629
630	630	AT+TR      :  Get or Set record time
631	631
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633	633
634	634	AT+CDP     :  Read or Clear cached data
635	635
636		-AT+DEBUG:  Enable or Disable debug mode
	613	+AT+DEBUG:  Enable or Disable debug mode
637	637
638	638	AT+ALARM1:  Get or Set alarm of distance1
639	639
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713	713
714	714	* NMDS200 NB-IoT Microwave Radar Distance Sensor x 1
715	715
716		-
717		-
718	718	= 9.  Support =
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