Sorry for tag-wasn’t sure where this would belong.
I’m trying to craft some reasonably accurate battery level indicators in openHAB for my WirelessTag sensors. They output the voltage of their (CR2032 and CR2025) batteries. I don’t know if this voltage output is tested under load or not, however the WirelessTag dashboard itself can provide some pretty accurate levels for these batteries (as a percentage and it’s voltage at a given temperature), so I’m hoping II can figure a formula to plug into openHAB to convert their raw voltage and temperature data into an approximate battery level. Any ideas?
I was thinking maybe that both voltage and temperature could be merged (perhaps sine/cosines?) to produce a better battery level estimate.