A cool technological topping to the Raspbery Pi.
From the TNC-X.com website: “TNC-Pi is a special version of TNC-X designed to interface directly with the Raspberry Pi computer. It can connect to the Pi either via the Pi’s serial port, or via the I2C protocol. In the latter case, a single Pi can support multiple TNC-Pi’s at the same time, since each TNC-Pi can be given a unique I2C address.”
$40.00 in kit form. $65.00 assembled and tested.