There is a lora.set_battery_level(level) method introduced in latest firmware.
Unfortunately current implementation is not in line with LoraWAN Specification v1.0.2
Method is passing values between 0 and 100 to the LoRaWAN server directly which means on server side 39% for level=100, 20% for level=50, there are no way to report battery level 40-100%.
Default value is 0 which indicates device is running on external source, level=0 doesn't mean 0%. Proper default value would be 255 which by the way can't be reported via this method.
I advice to allow level=0...255 in the method inpput argument and use level=255 as default, adding the quoted text from the LoRaWAN specification to the documentation.
danicampora
commented
7 years ago
Board: LoPy
Firmware: 1.7.8.b1
There is a lora.set_battery_level(level) method introduced in latest firmware.
Unfortunately current implementation is not in line with LoraWAN Specification v1.0.2
Method is passing values between 0 and 100 to the LoRaWAN server directly which means on server side 39% for level=100, 20% for level=50, there are no way to report battery level 40-100%.
Default value is 0 which indicates device is running on external source, level=0 doesn't mean 0%. Proper default value would be 255 which by the way can't be reported via this method.
I advice to allow level=0...255 in the method inpput argument and use level=255 as default, adding the quoted text from the LoRaWAN specification to the documentation.
Forum reference: https://forum.pycom.io/topic/1613/lorawan-mac-battery-level-reporting
(from bmarkus)