Use ESPHome/Home Assitant valve component/entity

[markbergsma]

I updated my Open AIR Valve ESPHome code to use the newer valve component to control using a single entity, as opposed to the old two entities. I replaced the old "number" and "cover" blocks by:

valve:
  - platform: template
    name: "Valve"
    id: airvalve
    icon: mdi:valve
    has_position: true
    optimistic: true
    lambda: |-
      if (id(my_stepper).target_position == 0) {
        return VALVE_CLOSED;
      }
      else {
        return id(airvalve).position;
      }
    open_action:
      - stepper.set_target:
          id: my_stepper
          target: 525
    close_action:
      - stepper.set_target:
          id: my_stepper
          target: 0
    position_action:
      then:
        - stepper.set_target:
            id: my_stepper
            target: !lambda |-
              if (pos <= 0.0) { 
                return 0; 
              } else if(pos >= 1.0) {
                return 525;
              } else if (pos > 0.0 && pos < 1.0) {
                int steps = id(valve_capacity_lookup_table)[pos * 100];
                return steps;
              } else {
                return 0;
              }