Bareback LF/MF WSPR transmitter using a Raspberry Pi
C
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README Cleanups, bugfixes, adding proper copyright notices. Feb 15, 2013
gpl-2.0.txt Cleanups, bugfixes, adding proper copyright notices. Feb 15, 2013
wspr.c
wspr.h Calculate tuning word and frequency errors Jan 24, 2013

README

To use:
Connect a low-pass filter to GPIO pin 4 and ground on your Raspberry Pi.  Connect an antenna to the LPF.

Compile by doing:
gcc -o wspr-pi wspr.c

Usage: wspr-pi <callsign> <locator> <power in dBm> <frequency in Hz>
        e.g.: wspr-pi MD1CLV IO74 30 137500