Transmitting .sub files with an RPi Pico

I just got a Flipper yesterday, really fun!

My primary incentive is to capture the signal from the remote for my blinds so I can have a home automation system control the blinds. The first part is easy: the remote is labeled 433.92MHz ASK, and the Flipper had no trouble capturing and replaying the signals.

The second part was trickier: how to re-transmit the signal on demand? With the parts I have on hand (RPi Pico and a 433.92MHz transmitter), I gave it a try. I wasn’t sure the RP2040 would be fast enough to toggle the transmitter on/off at the right time to mimic the signal. But it’s easy enough to try.

Sure enough, it works! Now I have a simple piece of code that can replay the .sub files captured from the Flipper. If anyone else wants to give it a go, the code’s on Github

When I get time, I’ll write the Hubitat driver so it can control the blinds.