arduino sensor platform allows you to get an numerical values from an analog input pin of an Arduino board. Usually the value is between 0 and 1024.
To enable an Arduino sensor with Home Assistant, add the following section to your
# Example configuration.yaml entry sensor: platform: arduino pins: 1: name: Door switch 0: name: Brightness
The 6 analog pins of an Arduino UNO are numbered from A0 to A5.