I’m currently testing batterylife with the whisper node and a CR2302 battery.
For my project I will need the whisper node to send sensor data every hour (reading distance from a US100 Ultrasonic sensor).
For testing purposes I set the sleeptime to 40 seconds, this way the battery will deplete faster, and I can estimate how long it would last with sleeptime of 60 minutes.
I started my sensor 04-10-2016 @ 12:10, The sensordata is being posted to tingspeak,I’m averaging every 10 results to get a nice graph:Update: Some data went missing because of an error in the backend code, the whisper node did send the data and receive the sleeptime as usual, it just didn’t get logged to thingspeak so the test is stil valid, and the whisper node is still going strong 🙂
The whisper node has been running for 12 days now, I estimated that when I will have the sensor readings every hour, I will get over 2 years of batterylife, and probably some more which is plenty for my project.