[chirp_devel] Newer TYT TH-UV3R firmware

[Eric Allen]

Hey guys,

I recently found myself in possession of a TYT TH-UV3R that had
difficulty interacting with CHIRP. I poked around a bit, and it seems
that this one has a significantly different memory map from the version
that CHIRP works with. The OEM software for the "TH-UV3R25" works great
for programming this radio, so I suspect that the difference is that
this is the "2.5 kHz" version (possibly the same as "the American
version"?). I've submitted a patch that works well for programming the
radio I have, and I wouldn't be surprised if this resolves #1227
(http://chirp.danplanet.com/issues/1227) and opens up the possibility of
tackling #353 (http://chirp.danplanet.com/issues/353).

Am I on the right track here, adding support for a model distinct from
the existing TH-UV3R?

Can anybody else confirm that the distinguishing difference is the
2.5kHz frequency step?

Should we find a way to detect the difference firmware versions from
dumps? Anybody else more familiar with this radio have an idea of where
to look in the memory map for a firmware version?

-Eric AG6IE
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