As I promised, here is the firmware.?Disclaimer : The code is provided as-is with no guarantees. Use at own risk.I managed to squeeze in Hans telemetry format.There are two timing files that one can choose from. I'll use timing2, which means:6 minute transmission cycle, commencing at minutes 2, 12, 22, 32, 42 and 52 of every hour right after taking a telemetry data snapshot.Minute 2 - 20m JT9 - Callsign + 6-char Maidenhead locatorMinute 3 - 20m?JT9 - 7+8 Maidenhead extended?locator chars + Altitude meters + Groundspeed km/hMinute 4 - 20m?WSPR - Standard WSPR messageMinute 6 - 20m?WSPR - Special WSPR telemetry messageMinute 12 - 20m?WSPR - Standard WSPR messageMinute 14 - 20m?WSPR - Standard WSPR messageMinute 16 - 20m?WSPR - Special WSPR telemetry messageMinute 22 - 20m?WSPR - Standard WSPR messageMinute 24 - 20m?WSPR - Standard WSPR messageMinute 26 - 20m?WSPR - Special WSPR telemetry messageMinute 32 - 20m JT9 - Callsign + 6-char Maidenhead locatorMinute 33 - 20m?JT9 - 7+8 Maidenhead extended locator chars + Altitude meters + Groundspeed km/hMinute 34 - 20m?WSPR - Standard WSPR messageMinute 36 - 20m?WSPR - Special WSPR telemetry messageMinute 42 - 20m?WSPR - Standard WSPR messageMinute 44 - 20m?WSPR - Standard WSPR messageMinute 46 - 20m?WSPR - Special WSPR telemetry messageMinute 52 - 20m?WSPR - Standard WSPR messageMinute 54 - 20m?WSPR - Standard WSPR messageMinute 56 - 20m?WSPR - Special WSPR telemetry message