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20	20	== 1.1 ​ What is N95S31B NB-IoT Sensor Node ==
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24	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*.
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40	40	~* make sure you have NB-IoT coverage locally.
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44	44	[[image:1657348284168-431.png]]
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	55	+
47	47	== 1.2 ​ Features ==
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71	71	(% style="color:#037691" %)**NB-IoT Spec:**
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73		-* B1 @H-FDD: 2100MHz
74		-* B3 @H-FDD: 1800MHz
75		-* B8 @H-FDD: 900MHz
76		-* B5 @H-FDD: 850MHz
77		-* B20 @H-FDD: 800MHz
78		-* B28 @H-FDD: 700MHz
	82	+* - B1 @H-FDD: 2100MHz
	83	+* - B3 @H-FDD: 1800MHz
	84	+* - B8 @H-FDD: 900MHz
	85	+* - B5 @H-FDD: 850MHz
	86	+* - B20 @H-FDD: 800MHz
	87	+* - B28 @H-FDD: 700MHz
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80	80	(% style="color:#037691" %)**Battery:**
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171	171	== 2.2 ​ Configure the N95S31B ==
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173	173	=== 2.2.1  Power On N95S31B ===
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355	355	To save battery life, N95S31B will establish a subscription before each uplink and close the subscription 3 seconds after uplink successful. Any downlink commands from server will only arrive during the subscription period.
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359	359	MQTT protocol has a much high-power consumption compare vs UDP / CoAP protocol. Please check the power analyze document and adjust the uplink period to a suitable interval.
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410		- (% style="color:blue" %)**AT+CFGMOD=2 ** (%%)~/~/  will set the N95S31B to work in MOD=2 distance mode which target to measure distance via Ultrasonic Sensor.
	421	+ (% style="color:blue" %)**AT+CFGMOD=2 ** (%%)~/~/will set the N95S31B to work in MOD=2 distance mode which target to measure distance via Ultrasonic Sensor.
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618		-**Higher byte:** Specify hardware version: always 0x00 for N95S31B
	630	+Higher byte: Specify hardware version: always 0x00 for N95S31B
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622		-**Lower byte:** Specify the software version: 0x6E=110, means firmware version 110
	634	+Lower byte: Specify the software version: 0x6E=110, means firmware version 110
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807	807	[[image:image-20220908163102-2.png]]
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809	809
810		-== 2.8 Battery & Power Consumption ==
	822	+== 2.8  ​Battery Analysis ==
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	824	+=== 2.8.1  ​Battery Type ===
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813		-N95S31B uses ER26500 + SPC1520 battery pack. See below link for detail information about the battery info and how to replace.
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815		-[[**Battery Info & Power Consumption Analyze**>>url:http://wiki.dragino.com/xwiki/bin/view/Main/How%20to%20calculate%20the%20battery%20life%20of%20Dragino%20sensors%3F/]] .
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	828	+The N95S31B 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.
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	832	+The battery is designed to last for several years depends on the actually use environment and update interval.
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	836	+The battery related documents as below:
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	839	+* [[Battery Dimension>>http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/ER26500/]]
	840	+* [[Lithium-Thionyl Chloride Battery datasheet>>http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/ER26500/]]
	841	+* [[Lithium-ion Battery-Capacitor datasheet>>http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/ER26500/]]
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	844	+[[image:image-20220709101450-2.png]]
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	847	+
	848	+=== 2.8.2  Power consumption Analyze ===
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	852	+The file **DRAGINO_N95S31B-Power-Analyzer.pdf** from [[https:~~/~~/www.dropbox.com/sh/mlpd6l05bogvaf6/AABwAJLMttqG7i~~-~~-AyZcQkoua?dl=0>>https://www.dropbox.com/sh/mlpd6l05bogvaf6/AABwAJLMttqG7i--AyZcQkoua?dl=0]] describes a detail measurement to analyze the power consumption in different case. User can use it for design guideline for their project.
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	859	+=== 2.8.3  ​Battery Note ===
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	863	+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 uplink data, then the battery life may be decreased.
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	866	+
	867	+=== 2.8.4  Replace the battery ===
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	871	+You can change the battery in the N95S31B.The type of battery is not limited as long as the output is between 3v to 3.6v. On the main board, there is a diode (D1) between the battery and the main circuit. If you need to use a battery with less than 3.3v, please remove the D1 and shortcut the two pads of it so there won't be voltage drop between battery and main board.
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	876	+The default battery pack of N95S31B 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).
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818	818	= 3. ​ Access NB-IoT Module =
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943		-firmware：[[https:~~/~~/www.dropbox.com/sh/fr8w23rb951512i/AACSJeGQg-7ZjKhAI_Sn57H6a?dl=0>>https://www.dropbox.com/sh/fr8w23rb951512i/AACSJeGQg-7ZjKhAI_Sn57H6a?dl=0]]
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945	945	(% style="color:red" %)**Notice, N95S31B and LSN50v2 share the same mother board. They use the same connection and method to update.**
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949	949	= 6.  Trouble Shooting =
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955	955	**Please see: **[[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/Firmware%20Upgrade%20Instruction%20for%20STM32%20base%20products/#H3.3Troubleshooting>>url:http://wiki.dragino.com/xwiki/bin/view/Main/Firmware%20Upgrade%20Instruction%20for%20STM32%20base%20products/#H3.3Troubleshooting]]
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959	959	== 6.2  AT Command input doesn't work ==
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968		-== 6.3 Not able to connect to NB-IoT network and keep showing "Signal Strength:99". ==
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971		-This means sensor is trying to join the NB-IoT network but fail. Please see this link for **//[[trouble shooting for signal strenght:99>>doc:Main.CSQ\:99,99.WebHome]]//**.
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974	974	= 7. ​ Order Info =
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999	999	* Weight / pcs : 180g
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1004	1004	= 9.  Support =
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1007	1007	* Support is provided Monday to Friday, from 09:00 to 18:00 GMT+8. Due to different timezones we cannot offer live support. However, your questions will be answered as soon as possible in the before-mentioned schedule.
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1009	1009	* Provide as much information as possible regarding your enquiry (product models, accurately describe your problem and steps to replicate it etc) and send a mail to [[support@dragino.com>>url:http://../../../../../../D:%5C%E5%B8%82%E5%9C%BA%E8%B5%84%E6%96%99%5C%E8%AF%B4%E6%98%8E%E4%B9%A6%5CLoRa%5CLT%E7%B3%BB%E5%88%97%5Csupport@dragino.com]]
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