class ADC – analog to digital conversion
The ADC class provides an interface to analog-to-digital convertors, and
represents a single endpoint that can sample a continuous voltage and
convert it to a discretised value.
adc = machine.ADC(pin) # create an ADC object acting on a pin
val = adc.read_u16() # read a raw analog value in the range 0-65535
Access the ADC associated with a source identified by id. This
id may be an integer (usually specifying a channel number), a
Pin object, or other value supported by the
Take an analog reading and return an integer in the range 0-65535.
The return value represents the raw reading taken by the ADC, scaled
such that the minimum value is 0 and the maximum value is 65535.