Sonoff 4CH Pro - Fan Configuration (esphome)

Share your Projects!
1

Hi!

I could find the answer on the forum, so I just “stole” some code I found on the internet to create an “Custom Fan” component for ESPHome and the Sonoff 4CH (Pro). We have Mechinical Ventilation at home and it uses a Perilex plug (https://www.ratio.nl/media/products/large/per_aan.jpg) and I wanted to switch it on with a selection for speed. This isn’t possible at our home, because the they only have an “On / Off” switch, instead of a state switch.

Configuration files: https://github.com/Daandamhuis/esphome

Custom Component

#include "esphome.h"
using namespace esphome;

#define PIN_1 12
#define PIN_2 5
#define PIN_3 4

class Sonoff4CHProFan : public Component, public FloatOutput {
  public:
    void write_state(float state) override {
      if (state < 0.3) {
        // OFF
        digitalWrite(PIN_1, LOW);
        digitalWrite(PIN_2, LOW);
        digitalWrite(PIN_3, LOW);
      } else if (state < 0.6) {
        // low speed
        digitalWrite(PIN_1, HIGH);
        digitalWrite(PIN_2, LOW);
        digitalWrite(PIN_3, LOW);
      } else if (state < 0.9) {
        // medium speed
        digitalWrite(PIN_1, LOW);
        digitalWrite(PIN_2, HIGH);
        digitalWrite(PIN_3, LOW);
      } else {
        // high speed
        digitalWrite(PIN_1, LOW);
        digitalWrite(PIN_2, LOW);
        digitalWrite(PIN_3, HIGH);
      }
    }
};
1 Like