I made my own smart-ish thermostat for $100 using a Model 3 B+ (more info in comments) : r/raspberry_pi
Scheda Honeywell : Amazon.it: Fai da te
Biamp 83RX 8x2.1, 8 Channel Mixer, Spring Reverb, 3 Band Equalizer *Read
2P fan coil air conditioning temperature control controller Tuya WIFI refrigeration thermostat with external temperature sensor|Smart Temperature Control System| - AliExpress
1769-L30ER-NSE Ethernet Controller | Allen Bradley | WIAutomation
Scheda elettronica Honeywell Bmbc - BAXI : SX5669550 : Amazon.it: Fai da te