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There's also http://www.whence.com/minimodem/ http://www.whence.com/minimodem/ which implements some standard methods: > standard FSK protocols such as Bell103
by matja 2y ago
There's also http://www.whence.com/minimodem/ http://www.whence.com/minimodem/ which implements some standard methods:
> standard FSK protocols such as Bell103, Bell202, RTTY, TTY/TDD, NOAA SAME, and Caller-ID
- deathanatos 2y agoI've never gotten minimodem to actually work. E.g., printf 'Hello, world\n' | minimodem --tx 440 minimodem --rx 440 (you can choose any freq.) results in a lot of, ### CARRIER 440 @ 800.0 Hz ### � ### NOCARRIER ndata=1 confidence=1.507 ampl=0.060 bps=439.96 (0.0% slow) ### ### CARRIER 440 @ 800.0 Hz ### � ### NOCARRIER ndata=1 confidence=1.858 ampl=0.053 bps=439.96 (0.0% slow) ### ### CARRIER 440 @ 800.0 Hz ### � ### NOCARRIER ndata=1 confidence=1.832 ampl=0.063 bps=439.96 (0.0% slow) ### and even when it does hit, ### CARRIER 440 @ 800.0 Hz ### Helln, world� ### NOCARRIER ndata=14 confidence=2.939 ampl=1.167 bps=438.67 (0.3% slow) ### If I try something like the example where he cats a man page: ### CARRIER 1200 @ 1200.0 Hz ### ��-O���܇����������������������=����~`���|�����������������������������_��������=����??�����?�����oﯰ������������������|���������������������߿��������������������������������������~�����`�|�w������������-Ӱ��>��み����>����� … I'm in a quiet room.