Radio shutters under smart home control

Our shutters came with the house and are operated by a radio remote on 433 MHz, a frequency many simple remote controls use. I wanted them on a schedule instead of on my memory.

To get there I looked at the signals from the original remote with an oscilloscope, a device that draws electrical signals as a curve. A pattern showed up: one part of the signal picks the shutter, the other part says up, down or stop.

With that understood, the shutters now follow sunrise and sunset and can be controlled by voice as well.

Their state also stays in sync, so the house always knows where each shutter is.