Sleep the card lora32u4

[Couin]

@sebsoft

ADCSRA = 0;

This is already done by LowPower.h

LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF);

@javialvar

Someone with the LORA32u4 card has achieved a few uA consumption?

I get around 200µA (without sensor).
Long story short, it depends the way you power the board (USB, BATT or 3v3 pin).
Big LoRa32u4 boards topic