This arduino sketch allows you to programatically send an IR signal using a KY-005 emitter.
- KY-005 transmitter to send the IR signal
- MQTT broker - to monitor status of the ESP32 and to control which IR signal to send
Rename Setup.h.orig to Setup.h and adjust the settings. Most of the settings should be self-explanatory.
The OTA_HASH is used during OTA updates of your ESP32 to authorize the update
#define OTA_HASH "OTA-HASH"
Replace "OTA-HASH with the MD5 hash of your desired password using e.g. a command like echo -n "PASSWORD"|md5
I use a photo diode (BPW 40) to identify if the AC is running. The diode is glued to one of the LEDs of the AC which only glow when the AC is active. When the value returned by the diode is below a given threshold, the AC is considered active. This information is then published via MQTT so I can show it in e.g. my Iobroker visualization.
#define PHOTO_DIODE_PIN 34
#define PHOTO_DIODE_THRESHOLD 4000
Currently the sketch subscribes to the MQTT topic mqtt.0.climateremote.desired_status and calls the function sendOn or sendOff depending on the value of the MQTT message. To change the MQTT topic or the values it should react to, please modify the function callback in setup.ino.
The IR codes that should be send are defined in ClimateRemote.ino in the functions sendOff and sendOn.
The IR codes (and even the whole function calls to use) can be found by using the sketch SimpleReceiver from File->Examples->IRemote in your Arduino IDE. In my case it is the raw code 0x639C7F80. This can be send either using the sendNEC method or the sendNECRaw.
// recommended format
IrSender.sendNEC(0x80, 0x9C, 3);
// legacy format
IrSender.sendNECRaw(0x639C7F80, 3);