[chirp_users] help running chirp-next on RPI

[Mike W]

At present I don't have a radio that chirp talks to so I'm unable to 
test further, but 'chirp-latest' appears to be functional on my 
Raspberry Pi 4 following the info in this thread. 73 Mike G8NXD.

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$ sudo apt install git python3-wxgtk4.0 python3-serial python3-six 
python3-future python3-requests python3-pip

Then grab the tarball and run "pip install" on the tarball

If you ran the above as your own user, then ~/.local/bin is where they are.
If you ran it as root, it should put it in /usr/local/bin.
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