Simple command line tool to send typical RF controlled wall switches codes with cheap 433Mhz RF sender modules and a Raspberry Pi.
First you have to install the wiringpi library. After that you can compile the program send by executing make. You may want to change the used GPIO pin before compilation in the send.cpp source file. A compiled binary for armv6l is included in the repository.
./send <channel> <switch> <command>
So for instance:
./send 4 1 1
To send "ON" to the first switch of the third channel.