esphome ifan02 cookbook info

ifan02.h

#include "esphome.h"
using namespace esphome;

class IFan02Output : public Component, public FloatOutput {
  public:
    void write_state(float state) override {
      if (state < 0.3) {
        // OFF
        digitalWrite(5, LOW);
        digitalWrite(4, LOW);
        digitalWrite(15, LOW);
      } else if (state < 0.6) {
        // low speed
        digitalWrite(5, HIGH);
        digitalWrite(4, LOW);
        digitalWrite(15, LOW);
      } else if (state < 0.9) {
        // medium speed
        digitalWrite(5, HIGH);
        digitalWrite(4, HIGH);
        digitalWrite(15, LOW);
      } else {
        // high speed
        digitalWrite(5, HIGH);
        digitalWrite(4, LOW);
        digitalWrite(15, HIGH);
      }
    }
};

ifan02.yaml

esphome:
  name: ifan02
  platform: ESP8266
  board: esp8285
  includes:
    - ifan02.h
  on_boot:
    priority: 225
    # turn off the light as early as possible
    then:
      - light.turn_off: ifan02_light

wifi:
  ssid: <YOUR_SSID>
  password: <YOUR_PASSWORD>

api:

logger:

ota:

binary_sensor:
  - platform: gpio
    id: vbutton_light
    pin:
      number: GPIO0
      inverted: True
    on_press:
      then:
        - light.toggle: ifan02_light

  - platform: gpio
    id: vbutton_relay_1
    pin:
      number: GPIO9
      inverted: True
    on_press:
      then:
        - switch.toggle: fan_relay1
        - switch.turn_on: update_fan_speed

  - platform: gpio
    id: vbutton_relay_2
    pin:
      number: GPIO10
      inverted: True
    on_press:
      then:
        - switch.toggle: fan_relay2
        - switch.turn_on: update_fan_speed

  - platform: gpio
    id: vbutton_relay_3
    pin:
      number: GPIO14
      inverted: True
    on_press:
      then:
        - switch.toggle: fan_relay3
        - switch.turn_on: update_fan_speed

output:
  - platform: custom
    type: float
    outputs:
      id: fanoutput
    lambda: |-
      auto ifan02_fan = new IFan02Output();
      App.register_component(ifan02_fan);
      return {ifan02_fan};

  - platform: gpio
    pin: GPIO12
    id: light_output

light:
  - platform: binary
    name: "iFan02 Light"
    output: light_output
    id: ifan02_light

switch:
  - platform: template
    id: update_fan_speed
    optimistic: True
    turn_on_action:
      then:
        - delay: 200ms
        - if:
            condition:
              and:
                - switch.is_off: fan_relay1
                - switch.is_off: fan_relay2
                - switch.is_off: fan_relay3
            then:
              - fan.turn_off: ifan02_fan
        - if:
            condition:
              and:
                - switch.is_on: fan_relay1
                - switch.is_off: fan_relay2
                - switch.is_off: fan_relay3
            then:
              - fan.turn_on:
                  id: ifan02_fan
                  speed: LOW
        - if:
            condition:
              and:
                - switch.is_on: fan_relay1
                - switch.is_on: fan_relay2
                - switch.is_off: fan_relay3
            then:
              - fan.turn_on:
                  id: ifan02_fan
                  speed: MEDIUM
        - if:
            condition:
              and:
                - switch.is_on: fan_relay1
                - switch.is_off: fan_relay2
                - switch.is_on: fan_relay3
            then:
              - fan.turn_on:
                  id: ifan02_fan
                  speed: HIGH
        - switch.turn_off: update_fan_speed

  - platform: gpio
    pin: GPIO5
    id: fan_relay1

  - platform: gpio
    pin: GPIO4
    id: fan_relay2

  - platform: gpio
    pin: GPIO15
    id: fan_relay3

fan:
  - platform: speed
    output: fanoutput
    id: ifan02_fan
    name: "iFan02 Fan"

'esp8266_restore_from_flash' option can help to restore settings after power failure and 'api.connected' condition can be used to prevent the early turning on of light component. Has anyone succeded in turing this code 'power failure resistant'?