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Updated ADC (markdown)

blakadder 2019-10-31 14:00:00 +01:00
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ADC.md

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ESP chips have one ADC pin that can read analog signals. When referring to the ADC pin these terms are used interchangeably: ADC (Analog-to-digital Converter), TOUT, Pin6, A0 or Analog Pin 0.
By default Tasmota allows the ADC pin to be used as an external input and assigned to a component. The signal can be interpreted as Lux, Temperature, a Button or a "generic" analog voltage signal.
By default Tasmota allows the ADC pin to be used as an external input and assigned to a component. The signal can be interpreted as temperature, lux, potentiometer, button or "generic" voltage signal.
The reading will show in web UI's sensor section as "Analog0 %value%" and published in `tele/%topic%/SENSOR` JSON response as `"ANALOG":{"A0":%value%}`. The pin has a 10-bit resolution, which means _%value%_ can be between `0` and `1024`.
### Rule triggers
To use ADC in rules use these triggers:
Use these triggers in rules:
`on ANALOG#A0div10 do ...` - when the A0 input changes by more than 1% it provides a value between 0 and 100