Thank you for this great project, it's running now at least. I had some problems with finding the right way flashing to NRF51822, but now its runnig using esp32 and node-red. Thank you very much. waltino

Hey guys, I would like to make my e450 smart too, but I am a beginner in stuff like that. I don't understand where to connect the cables! Has somebody a picture or a graphic from this project?

And what cable is meant by "RCA/3,5mm audio jack"?

Thanks and greetings 

Flo

See comments in Arduino Code:

// Teufel remote functions

// P0.0 Source switch
// P0.04 Power/Mute/Encoder C
// P0.01 Encoder A
// P0.03 Encoder B
// P0.09 LED2
// P0.29 LED1
// P0.13 RX - (unused)
// P0.14 TX - (unused)
// All inputs are pulled up, so active LOW

I just saw, the documentation of the pins is in the teufel.ino file.

Edit: Just finished to replicate the project. Works like a charm! I did'nt use the photoresistor to get the real current power state of the Teufel AVR, because the transmission of the commands is pretty reliable and there are separate commands for on and off. So now I finally again only have one (harmony) remote to control all of my devices.
BTW: Instead of an ESP32, I used an Arduino Nano with an Ethernet Shield and had to add the pairing function (>15s input-keypress) to make it work.
So last but not least, I want to thank you for your efforts! I also tried to analyse the protocol and therefore already had a 2G4M04S1D-Dev-Board laying around, but would never have had the idea to simply clone the binary from one NRF51822 to the other one. You saved me a ton of time! Thanks.

Hello, a very successful project that I would like to replicate. Could you document which pins of the NRF51822 you used? Thank you very much, Bulli223