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634	634	[[image:1654506634463-199.png]] ​
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637	637	Choose the proper measuring position. Avoid the probe to touch rocks or hard things. Split the surface soil according to the measured deep. Keep the measured as original density. Vertical insert the probe into the soil to be measured. Make sure not shake when inserting.
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640	640
641		-
642	642	[[image:1654506665940-119.png]]
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644	644	Dig a hole with diameter > 20CM.
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645	645
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646	646	Horizontal insert the probe to the soil and fill the hole for long term measurement.
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647	647
648	648
649	649	== 2.10 ​Firmware Change Log ==
650	650
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651	651	**Firmware download link:**
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652	652
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653	653	[[http:~~/~~/www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LSE01/Firmware/>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/LSE01/Firmware/]]
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656	656	**Firmware Upgrade Method: **[[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
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659	659	**V1.0.**
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661	661	Release
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663	663
664	664	== 2.11 ​Battery Analysis ==
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665	665
666	666	=== 2.11.1 ​Battery Type ===
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668	668	The LSE01 battery is a combination of a 4000mAh Li/SOCI2 Battery and a Super Capacitor. The battery is non-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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669	669
670		-
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671	671	The battery is designed to last for more than 5 years for the LSN50.
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672	672
673		-
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675	675	The battery-related documents are as below:
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677	677
678	678	* (((
679	679	[[Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],
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691	691
692	692	=== 2.11.2 ​Battery Note ===
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694	694	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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697	697
698	698	=== 2.11.3 Replace the battery ===
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700	700	If Battery is lower than 2.7v, user should replace the battery of LSE01.
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701	701
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702	702	You can change the battery in the LSE01.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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703	703
704		-
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705	705	The default battery pack of LSE01 includes a ER18505 plus super capacitor. If user can’t find this pack locally, they can find ER18505 or equivalence, 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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709		-
710		-
711		-
712	712	= 3. ​Using the AT Commands =
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714	714	== 3.1 Access AT Commands ==