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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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118	118	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	== 1.8  Pin Definitions and Switch ==
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351	351	* (% style="color:#037691" %)**Timestamp: **(%%)0x6390453d =1670399293 (Unix Time)
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354	354	== 2.4  Payload Explanation and Sensor Interface ==
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356	356	=== 2.4.1  Device ID ===
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466	466	* For each uplink probe, LED will be on for 500ms.
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469	469	== 2.7  Distance alarm function ==
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705	705	* NMDS200 NB-IoT Microwave Radar Distance Sensor x 1
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708	708	= 9.  Support =
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