Do you have any more information about the I2C interface on the 202U receiver? I realize this isn’t a supported feature, but more information could really make this unit more attractive to hobbyists.
I did find:
That lists 0x40 as the device address, but I’m not able to get any replies from the receiver on that address. I found 0x50 and 0x58 open, and they reply with a 30 second timer when any button is pushed, but doesn’t indicate which button was pushed.
If I can make this work, I’ll gladly post an example Arduino sketch to help out others who may be interested in this.