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937	937
938	938	You can change the battery in the LSPH01.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.
939	939
	940	+
940	940	The default battery pack of LSPH01 includes a ER26500 plus super capacitor. If user can’t find this pack locally, they can find ER26500 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)
941	941
942	942
943	943
944		-= 5. Use AT Command =
945	945
946		-== 5.1 Access AT Commands ==
947	947
	947	+
	948	+1. Use AT Command
	949	+11. Access AT Commands
	950	+
948	948	LSPH01 supports AT Command set in the stock firmware. You can use a USB to TTL adapter to connect to LSPH01 for using AT command, as below.
949	949
950		-[[image:1654589001411-343.png]]
	953	+[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image025.png]]
951	951
952	952	Connection:
953	953
954	954	USB TTL GND <~-~-~-~-> GND
955	955
956		-USB TTL TXD  <~-~-~-~-> UART_RXD
	959	+USB TTL TXD <~-~-~-~-> UART_RXD
957	957
958		-USB TTL RXD  <~-~-~-~-> UART_TXD
	961	+USB TTL RXD <~-~-~-~-> UART_TXD
959	959
960	960
961	961	In the PC, you need to set the serial baud rate to **9600** to access the serial console for LSPH01. LSPH01 will output system info once power on as below:

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