CastVolumeKnob is hardware volume control for Chromecast Audio devices, based on the ESP8266 microcontroller using micropython.
- For controlling the volume on Chromecast devices you need to use your phone. - it is clumsy, not very intuitive.
- Easy to use, hardware based volume control.
- Visual feedback of the current volume level
- Relatively cheap
This is the final form. Completely wireless, rechargeable device.
To wake it up you have to tap the knob once. After it wakes up it automatically connects to the first chromecast device, you can control its volume by turning the knob. To change the device tap the knob again. To stop the music playback press and hold the knob until the LEDs turn red.