Hello, I want to read and analog input before and after going into power-down mode. Without the sleeping function, it works like it should. However, as soon as the power-down mode is integrated, the ADC readings are garbage, and the serial monitor spits out garbage. I do understand, that waking up …

Have you tried Serial.flush() before sleep?

ADC readings after waking up from POWER-DOWN

MaximoEsfuerzo February 19, 2024, 12:53am 10

Exactly.