For the hardware, [KP4TR] is using a Raspi, a Baofeng BF-888s 400MHz ... s GPIO to indicate whether the radio is transmitting or receiving. The software used is SVXLink, a Linux port of ...
With extremely basic handheld radios starting at around ten dollars and a capable dual-bander being yours for somewhere over twice that, most licencees will now own a Baofeng UV5 or similar radio.
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