Home Assistant Controls Microcontrollers over MQTT
Automating your four walls does not necessarily require commercial solutions. With a little skill, you can develop your own projects on a low budget.
Microcontroller
Controlling microcontrollers over USB with the Web Serial API
Upgrade your computer with LEDs, buttons, or sensors to control a microcontroller board over USB from your web browser.
Making a Retro-Style Alarm Clock
A few electronic components, some code, and a hand-made wooden case make a fine retro-style bedside clock.