A Raspberry Pi Zero W bedside clock appliance: HT16K33 7-segment display driven directly over I2C, NTP/DST-correct, with systemd packaging, HomeKit, and a printable case.
Local Ecobee control in Python via HomeKit. No cloud, no ecobee API key, no Home Assistant. Pair once, then read/control temp, mode, sensors, and more from a GUI, CLI, or library.