edgetriggeredNow that the SA868 can be used for more interesting applications, I am slowly designing a new OpenRTX target that is a complete board replacement for these toy pink cat radios from AliExpress. #electronics #hamradio #m17 #dmr
KD9KCK@edgetriggered Do you have any more information on how you achieved this, other then saying its basically just a modified OpenRTX driver for the onboard RF Chip. (Want to see if I can eventually get my ESP32 based FM Repeater working as an M17 Repeater.)
@chibill The first step is using the module's unlabelled programming pads to identify if the R8C microcontroller's flash can be unlocked for reprogramming. There is a single pin used to enter programming mode after reset, which then functions as a half-duplex UART for a few simple commands: https://people.redhat.com/dj/m32c/flash-guide.pdf