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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 ==
59	59
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
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614	614
615	615
616	616
617		-=== 2.5.2  Power consumption Analyze ===
	651	+=== 2.8.2  Power consumption Analyze ===
618	618
619	619	(((
620	620	Dragino battery powered product are all runs in Low Power mode. We have an update battery calculator which base on the measurement of the real device. User can use this calculator to check the battery life and calculate the battery life if want to use different transmit interval.
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652	652
653	653
654	654
655		-=== 2.5.3  ​Battery Note ===
	689	+=== 2.8.3  ​Battery Note ===
656	656
657	657	(((
658	658	The Li-SICO battery is designed for small current / long period application. It is not good to use a high current, short period transmit method. The recommended minimum period for use of this battery is 5 minutes. If you use a shorter period time to transmit LoRa, then the battery life may be decreased.
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660	660
661	661
662	662
663		-=== 2.5.4  Replace the battery ===
	697	+=== 2.8.4  Replace the battery ===
664	664
665	665	(((
666	666	The default battery pack of NDDS75 includes a ER26500 plus super capacitor. If user can't find this pack locally, they can find ER26500 or equivalence without the SPC1520 capacitor, which will also work in most case. The SPC can enlarge the battery life for high frequency use (update period below 5 minutes).