Battery lifespan
This node can run on one or two battery cells and cannot be powered by an USB connector, that is to say, it cannot
be powered by using an external power source. No Real Time Clock (RTC) battery is allocated in piconodes. As a
result, anytime the battery or batteries are removed, you need to update the node’s time and date via Dlog app.
The battery life of the Piconode will depend on the sampling rate selected, on the radio communication quality, i.e.
the spreading factor (SF) and
the transmission power (Tx Pw) with which the system works and on the
temperature profile of the area.
Some estimated figures for a scenario with SF:9 ; Tx Pw 14dB (European radio ) and with the temperature profile of
Singapore (average temperature: 31ºC) are as follows:
Sensor
Sampling rate
One battery
Two batteries
Potentiometer
+ Thermistor
5 min
1 year
2.5 years
1 h
5 years
8 years
6 h
6.5 years
9.5 years
Sensors
Sampling rate
One battery
Two batteries
Gauge +
Thermistor
5 min
0.5 years
1.5 years
1 h
4 years
6.5 years
6 h
6 years
9 years
Sensors
Sampling rate
One battery
Two batteries
Pulses
5 min
1.5 years
3 years
1 h
5.5 years
8 years
6 h
6.5 years
9.5 years
Figure 42. Tables showing the estimated battery duration based on the sensors connected and the sampling rate selected.
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