I am wanting to multiplex a 16 button keypad to an 8 button RC transceiver so that I can have remote control over 16 functions instead of the standard 8.
The transceiver I am using is the 900MHz HumPRC from Linx Technologies. https://linxtechnologies.com/wp/product/humprc-series-remote-control/
I am getting hung up on a couple of things:
- Which would make more sense, use eight 2:1 MUX, use two 8:4 MUX, or one 4x4 matrix keypad and a PIC microcontroller?
- The radio only has 8 status lines and transmits the image of these status lines across the wireless link. On the receiver side how do I know that a button greater than 8 was pressed?