Users Manual

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LSN50 LoRa Sensor Node User Manual 37 / 55
Note: Ignore the 18 year result, because the battery has a max 2% discharge per year.
2.8.3 Battery Note
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.
2.8.4 Replace the battery
You can change the battery in the LSN50.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.
The default battery pack of LSN50 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)
3. Using the AT Commands
3.1 Access AT Commands
LSN50 supports AT Command set in the stock firmware. You can use a USB to TTL adapter to
connect to LSN50 for using AT command, as below.