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41	41
42	42	== 1.2 ​ Features ==
43	43
	44	+
44	44	* NB-IoT Bands: B1/B3/B8/B5/B20/B28 @H-FDD
45	45	* Monitor Temperature & Humidity via SHT31
46	46	* AT Commands to change parameters
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53	53	* 8500mAh Battery for long term use
54	54
55	55
56		-
57		-
58	58	== 1.3  Specification ==
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60	60
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82	82	* Max boost current: 2A, 1 second
83	83
84	84
85		-
86		-
87	87	== ​1.4  Applications ==
88	88
89	89	* Smart Buildings & Home Automation
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132	132	1. Send an uplink packet
133	133
134	134
	132	+
135	135	= 2.  Use N95S31B to communicate with IoT Server =
136	136
137	137	== 2.1  How it works ==
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378	378
379	379
380	380
	379	+
381	381	=== 2.3.1  Payload Analyze ===
382	382
383	383	N95S31B uplink payload includes in total 21 bytes
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587	587
588	588
589	589
590		-== 2.5  ​Battery Analysis ==
	589	+== 2.6  ​LED Indicator ==
591	591
592		-=== 2.5.1  ​Battery Type ===
593	593
	592	+The NDDS75 has an internal LED which is to show the status of different state.
594	594
	594	+
	595	+* When power on, NDDS75 will detect if sensor probe is connected, if probe detected, LED will blink four times. (no blinks in this step is no probe)
	596	+* Then the LED will be on for 1 second means device is boot normally.
	597	+* After NDDS75 join NB-IoT network. The LED will be ON for 3 seconds.
	598	+* For each uplink probe, LED will be on for 500ms.
	599	+
595	595	(((
	601	+
	602	+)))
	603	+
	604	+
	605	+
	606	+== 2.7  ​Firmware Change Log ==
	607	+
	608	+
	609	+(((
	610	+Download URL & Firmware Change log
	611	+)))
	612	+
	613	+(((
	614	+[[https:~~/~~/www.dragino.com/downloads/index.php?dir=NB-IoT/NDDS75/Firmware/>>url:https://www.dragino.com/downloads/index.php?dir=NB-IoT/NDDS75/Firmware/]]
	615	+)))
	616	+
	617	+
	618	+(((
	619	+Upgrade Instruction: [[Upgrade_Firmware>>||anchor="H5.1200BHowtoUpgradeFirmware"]]
	620	+)))
	621	+
	622	+
	623	+
	624	+== 2.8  ​Battery Analysis ==
	625	+
	626	+=== 2.8.1  ​Battery Type ===
	627	+
	628	+
	629	+(((
596	596	The NDDS75 battery is a combination of an 8500mAh Li/SOCI2 Battery and a Super Capacitor. The battery is none-rechargeable battery type with a low discharge rate (<2% per year). This type of battery is commonly used in IoT devices such as water meter.
597	597	)))
598	598