ESP32 / ESP8266 Wiring (DHT22 + Relay Module). Accurate, low-cost digital temperature & humidity sensor module (DHT22 / AM2302). Relay is active HIGH in this example. state; float tgt = id(target_temp); float hys = id(hysteresis); unsigned long now = id(millis)(); // read relay state bool is_on = id(heater_relay).
