Homebrewed room by room themperature control
Very rough i2c control for the temperature sensor (texas tmp 102 http://www.ti.com.cn/cn/lit/ds/symlink/tmp102.pdf) The board has: 4 digit 7seg led display 1 encoder 1 pushbutton 485 serial interface 2 tempeature sensors 1 AC triac switch ATMEGA328p cpu