Notes and write-ups

How I built a custom Homekit thermostat for 40€

I wanted a smart HomeKit thermostat for a long time. The only problem is that it is quite expensive so I never bought one. Last year, Espressif organized an introductory workshop to familiarize people with ESP32. I’ve heard about this board before but didn’t know what exactly it was and never really played with it. So I signed up for the workshop to get hands-on experience with the chip. If you don’t know what ESP32 is, you can think of it as something between Arduino and Raspberry Pi - a microprocessor that you can program in C with GPIO pins, WiFi and Bluetooth connectivity.