Support for ESP32's hall sensor

[fabaff]

The ESP32 has a built-in hall sensor. It's possible to use hallRead() in the Arduino IDE.

void loop() {
  int hall = 0;
  hall = hallRead();
  Serial.println(hall); 
	delay(3000);
}

I guess that it would only be useful for people who don't have any real sensors around to play with an actual sensor value beside using ADC pin and touch them 😉 .

[OttoWinter]

Done 😺

f1703fa
esphome/esphome@4f3f460
esphome/esphome-docs@59e58c2