ADC

Example

Use adc0 channel to sample at pin 36 and read the value.

from m5stack import *
from m5ui import *
from uiflow import *
import machine

setScreenColor(0x222222)

adc0 = machine.ADC(36)
adc0.width(machine.ADC.WIDTH_12BIT)
adc0.atten(machine.ADC.ATTN_11DB)
while True:
  print(adc0.read())
  wait_ms(2)

API

adc0 = machine.ADC([pin])

• Setting the Sample Channel Pins

adc0.width(machine.ADC.WIDTH_12BIT)

• Setting the sample width

adc0.atten(machine.ADC.ATTN_11DB)

• Setting ADC input attenuation
  • ADC.ATTN_0DB: 0dB attenuation, providing a maximum input voltage of 1.00v.
  • ADC.ATTN_2_5DB: 2.5dB attenuation, providing a maximum input voltage of approximately 1.34v.
  • ADC.ATTN_6DB: 6dB attenuation, providing a maximum input voltage of approximately 2.00v.
  • ADC.ATTN_11DB: 11dB attenuation, providing a maximum input voltage of approximately 3.6v.

adc0.read()

• Read ADC value