Apple Homekit integration (voice activation) for Velux windows using Lilygo T-Relay ESP32 and velux standard remotes

Code and instructions to automate opening and closing of Velux window and blind using apple home

• Lilygo TTGO T-Relay ESP32 4 relay - to drive both powered Velix window and blinds
• Lilygo USB to serial chip T-U2T - to communicate with Lilygo board
• Velux KLI 311 - Window wall switch
• Velux KLI 312 - Blind wall swtich
• 21v power supply

Soldering kit Wiring etc

1. Connect to ardunio ide using esp32 dev board and serial chip
2. Upload code
3. Configure wifi via serial monitor
4. Connect to apple home using homespan paring setup code
5. Disconnect and reconnect to your permanent 24 dc power supply

A list of reminders

1. Not connecting? Make sure you have followed Lilgo installation instructions
2. Not connecting? Don't forget to use the serial chip (I did this so many times)
3. Not connecting in apple home? The range of the wifi to the Lilygo can affect performance
4. Not connecting in apple home? I found a laptop quicker to find devices than a phone for testing reliability