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1	1	(% style="text-align:center" %)
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8		-**Table of Contents:**
9	9
10		-{{toc/}}
11	11
	10	+**Table of Contents:**
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	16	+
17	17	= 1.  Introduction =
18	18
19		-== 1.1 ​ What is NDDS75 Distance Detection Sensor ==
	19	+== 1.1 ​ What is N95S31B NB-IoT Sensor Node ==
20	20
21	21	(((
22	22
23	23
24		-(((
25		-(((
26		-The Dragino NDDS75 is a (% style="color:blue" %)**NB-IoT Distance Detection Sensor**(%%) for Internet of Things solution. It is designed to measure the distance between the sensor and a flat object. The distance detection sensor is a module that uses ultrasonic sensing technology for distance measurement, and temperature compensation is performed internally to improve the reliability of data.
27		-)))
	24	+The Dragino N95S31B is a (% style="color:blue" %)**NB-IoT Temperature and Humidity Sensor**(%%) for Internet of Things solution. It is used to measure the (% style="color:blue" %)**surrounding environment temperature and relative air humidity precisely**(%%), and then upload to IoT server via NB-IoT network*.
28	28
29		-(((
30		-The NDDS75 can be applied to scenarios such as horizontal distance measurement, liquid level measurement, parking management system, object proximity and presence detection, intelligent trash can management system, robot obstacle avoidance, automatic control, sewer, bottom water level monitoring, etc. It detects the distance between the measured object and the sensor, and uploads the value via wireless to IoT Server via NB-IoT Network.
31		-)))
	26	+The temperature & humidity sensor used in N95S31B is SHT31, which is fully calibrated, linearized, and temperature compensated digital output from Sensirion, it provides a strong reliability and long-term stability. The SHT31 is fixed in a (% style="color:blue" %)**waterproof anti-condensation casing **(%%)for long term use.
32	32
33		-(((
34		-NarrowBand-Internet of Things (NB-IoT) is a 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.
35		-)))
	28	+N95S31B supports different uplink methods include (% style="color:blue" %)**TCP, MQTT, UDP and CoAP**(%%) for different application requirement.
36	36
37		-(((
38		-NDDS75 supports different uplink methods include (% style="color:blue" %)**TCP, MQTT, UDP and CoAP** (%%)for different application requirement.
39		-)))
	30	+N95S31B is powered by(% style="color:blue" %)**8500mAh Li-SOCI2 battery**(%%), It is designed for long term use up to several years. (Real-world battery life depends on the use environment, update period. Please check related Power Analyze report).
40	40
41		-(((
42		-NDDS75 is powered by (% style="color:blue" %)**8500mAh Li-SOCI2 battery**(%%), It is designed for long term use up to 5 years. (Actually Battery life depends on the use environment, update period & uplink method)
43		-)))
44	44
45		-(((
46		-To use NDDS75, user needs to check if there is NB-IoT coverage in local area and with the bands NDDS75 supports. If the local operate support it, user needs to get a NB-IoT SIM card from local operator and install NDDS75 to get NB-IoT network connection.
47		-)))
48		-)))
	33	+~* make sure you have NB-IoT coverage locally.
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50	50
51	51	)))
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53		-[[image:1657327959271-447.png]]
	38	+[[image:1657348284168-431.png]]
54	54
55	55
56	56
57	57	== 1.2 ​ Features ==
58	58
	44	+
59	59	* NB-IoT Bands: B1/B3/B8/B5/B20/B28 @H-FDD
60		-* Ultra low power consumption
61		-* Distance Detection by Ultrasonic technology
62		-* Flat object range 280mm - 7500mm
63		-* Accuracy: ±(1cm+S*0.3%) (S: Distance)
64		-* Cable Length: 25cm
	46	+* Monitor Temperature & Humidity via SHT31
65	65	* AT Commands to change parameters
66	66	* Uplink on periodically
67	67	* Downlink to change configure
68	68	* IP66 Waterproof Enclosure
	51	+* Ultra-Low Power consumption
	52	+* AT Commands to change parameters
69	69	* Micro SIM card slot for NB-IoT SIM
70	70	* 8500mAh Battery for long term use
71	71
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90	90
91	91	(% style="color:#037691" %)**Battery:**
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	77	+
93	93	* Li/SOCI2 un-chargeable battery
94	94	* Capacity: 8500mAh
95	95	* Self Discharge: <1% / Year @ 25°C
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96	96	* Max continuously current: 130mA
97	97	* Max boost current: 2A, 1 second
98	98
99		-(% style="color:#037691" %)**Power Consumption**
100	100
101		-* STOP Mode: 10uA @ 3.3v
102		-* Max transmit power: 350mA@3.3v
103	103
104		-
105		-
106	106	== ​1.4  Applications ==
107	107
108	108	* Smart Buildings & Home Automation
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118	118
119	119	== 1.5  Pin Definitions ==
120	120
	101	+N95S31B use the mother board from NBSN95 which as below.
121	121
122		-[[image:1657328609906-564.png]]
	103	+[[image:image-20220709144723-1.png]]
123	123
124	124
	106	+=== 1.5.1 Jumper JP2 ===
125	125
126		-= 2.  Use NDDS75 to communicate with IoT Server =
	108	+Power on Device when put this jumper.
127	127
	110	+
	111	+
	112	+=== 1.5.2 BOOT MODE / SW1 ===
	113	+
	114	+1) ISP: upgrade mode, device won't have any signal in this mode. but ready for upgrade firmware. LED won't work. Firmware won't run.
	115	+
	116	+2) Flash: work mode, device starts to work and send out console output for further debug
	117	+
	118	+
	119	+
	120	+=== 1.5.3 Reset Button ===
	121	+
	122	+Press to reboot the device.
	123	+
	124	+
	125	+
	126	+=== 1.5.4 LED ===
	127	+
	128	+It will flash:
	129	+
	130	+1. When boot the device in flash mode
	131	+1. Send an uplink packet
	132	+
	133	+
	134	+
	135	+
	136	+= 2.  Use N95S31B to communicate with IoT Server =
	137	+
128	128	== 2.1  How it works ==
129	129
130	130	(((

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