I've done exactly this on my own air filter, and it's about 200 lines of config. The hardest part is mapping binary outputs to a percentage:
switch:
- platform: gpio
pin: GPIO21
id: fan_low
interlock_wait_time: 250ms
interlock: &interlock_group [fan_low, fan_mid, fan_high, fan_turbo]
- platform: gpio
pin: GPIO25
id: fan_mid
interlock_wait_time: 250ms
interlock: *interlock_group
- platform: gpio
pin: GPIO22
id: fan_high
interlock_wait_time: 250ms
interlock: *interlock_group
- platform: gpio
pin: GPIO17
id: fan_turbo
interlock_wait_time: 250ms
interlock: *interlock_group
output:
- platform: template
id: fan_speed_output
type: float
write_action:
- lambda: |-
id(fan_low).turn_off();
id(fan_mid).turn_off();
id(fan_high).turn_off();
id(fan_turbo).turn_off();
auto light = ((AddressableLight*)id(status_light).get_output());
for (int i = 6; i <= 9; i++) {
light->get(i).set(Color::BLACK);
}
if (state < 0.24) {
} else if (state < 0.26) {
id(fan_low).turn_on();
light->get(6).set(Color(255,0,0,0));
} else if (state < 0.51) {
id(fan_mid).turn_on();
light->get(7).set(Color(255,0,0,0));
} else if (state < 0.76) {
id(fan_high).turn_on();
light->get(8).set(Color(255,0,0,0));
} else {
id(fan_turbo).turn_on();
light->get(9).set(Color(255,0,0,0));
}
light->schedule_show();
fan:
- platform: speed
name: "Filter Speed"
output: fan_speed_output
speed_count: 4
id: my_fan