CTCSS Decoder for Arduino
This library detects and does $THING when CTCSS tone is detected.
This is based on the work by ON7EQ and YO3HJV
Original Details: http://www.qsl.net/on7eq/projects/arduino_ctcss.htm and http://yo3hjv.blogspot.ca/2015/01/ctcss-decoder-with-arduino.html
TODO: Write more