To program your Arcshell AR-5 radios, you'll need a programming cable like this one: You can either purchase one for less than $2 from AliExpress or create your own using a USB to Serial FTDI ...

[KP4TR] connected a Raspberry Pi to a small, cheap handheld radio, allowing anyone within a few miles of his house to connect to amateur radio operators all around the world. For the hardware ...