www.dragino.com
LSN50 LoRa Sensor Node User Manual
35
/
60
Low Power Case
:
●
Radio Parameter: SF7, 125kHz, 20dbm
●
Transmit interval: 15 minutes.
●
Payload: 8 Bytes.
High Power Case
:
●
Radio Parameter: SF10, 125kHz, 20dbm
●
Transmit interval: 15 minutes.
●
Payload: 8 Bytes.
To simplify the calculation, we can:
●
Combine oil sensor and DS18B20 sampling energy together to
●
Combine the two RX windows together.
There is a
for easy analysis. Below is the analysis result.
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 uses 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. 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
