Tuesday, June 17, 2014

Making Arduino UNO / atmega328 as an AFSK modem or TNC

This is a Micro APRS from this site ( http://unsigned.io/microaprs/ ). I just get a few common parts and put everything together on top of a ProtoShield. 

Arduino AFSK modem/TNC

Once it was working, I made another one so that it can talk to each other over RF. The picture below are two Arduino UNO connected directly to test the Tx and Rx encoding/decoding.

Decoding APRS packets off the air on 144.390 Mhz.

The Arduino modem / TNC working and connected to my Wouxun handy.

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