Maximum Voltage Measured 0.82V

ESPHome
1

When using the platform adc with my Seeed-XIAO-ESP32C3 like this:

sensor:
  - platform: adc
    pin: 2
    name: "Plant1Humidity"
    update_interval: 2s
    raw: true

the value caps out at 4095 at 0.824V input voltage. Anything above that will be registered as 0.84V. The adc works fine when i program the board using arduino and analogRead but here it caps out too early.

2

What happens if you change the attenuation?

Also have a read about calibration changes which may not have been implemented in Arduino.

3

Thank you, that did it. It still can’t measure the full range of inputs even with maximum attenuation, but neither can my own arduino program.