its pretty easy to build a TNC for aprs with an arduino; I've done a few. Average cost was ~$15 as one-off prototypes.
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On 5/27/2019 3:12 AM, Lou Giliberto (KD7HCW) via Groups.Io wrote:
There's two ways to go: a digipeter or an IGATE An IGATE is actually one of my current projects. Just ordered the TNC described in the article. I'll probably make it receive-only with a Baofeng hooked up through a mutlicoupler to my scanner antenna. But that would still allow nearby radios to get their packet info in the APRS mix.