Lambda Filter

Perform a simple mathematical operation over the sensor values. The input value is x and the result of the lambda is used as the output (use return ).

# Example configuration entry
filters:
  - lambda: return x * (9.0/5.0) + 32.0;

Make sure to add .0 to all values in the lambda, otherwise divisions of integers will result in integers (not floating point values).

To prevent values from being published, return {} :

# Example configuration entry
filters:
  - lambda: |-
      if (x < 10) return {};
      return x-10;