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W2TAZ > TECH 05.11.24 04:33l 48 Lines 2521 Bytes #999 (0) @ WW
BID : 46924_KC9VYU
Read: GUEST
Subj: RE: Adding wifi/ethernet to TNC
Path: IW8PGT<IZ3LSV<I0OJJ<LU4ECL<LU9DCE<GB7YEW<W9GM<W9LCF<KC9VYU
Sent: 241105/0324Z 46924@KC9VYU.#NEIN.IN.USA.NOAM LinBPQ6.0.23
> Has anyone ever added a small micro like the ESP8266 to a tnc
> where it connects to the ttl serial signals and allows you to
> telnet into your tnc over the network rather than using the
> serial port? I was thinking of doing this for a friend that wants
> to put a packet tnc in his shack which is located a distance from
> his house. He doesn't want to run a node like bpq just wants a
> simple tnc for vhf packet but doesn't want to run a full blown
> computer in the shack to attach to it and remote control it. I
> was thinking of using the esp8266 or similar device with wifi
> in it and install it in the tnc so he could telnet to the tnc.
> Any thoughts on this? Problems it may cause?
My first thought is why modify the TNC itself when you can kinda get the
best of both worlds here. Something like a Raspberry Pi (or one of the
alternatives if that company isn't your cup of tea) that already has the
capabiility for ethernet or wifi, and connect the TNC serial port to an
appropriate set of pins for RS232 serial communication. From there they
could just telnet (or preferably SSH) into it, pick... one of several
command-line serial console applications and point it at the serial port.
Instant TNC. And Pis being just small single board computers, well, I assume
you know what they're like, but that seems like a better solution than
trying to cram networking into a TNC... especially since the easiest way
to do that is genuinely just to embed one of those in the TNC instead, as
far as my knowledge goes. Programs for that are already written, you're
activating one that already exists (the sshd / telnetd server), and then
manually starting another (or put it in .bashrc and have it start automatically),
it's a lot more turn-key than flashing a MCU to be the go-between.
If the plan is to access it solely from the local network (physically remote
but on the same Wi-Fi type setup) then that's really about it, if they aren't
that savvy with Linux, if you aren't, I could certainly help them set it up.
If we're going to get into over-the-internet operation then it's time to grab
your coffee because that can involve varying levels of headache depending on
the exact way things are set up there.
--
Another benefit of using a Pi or such is the fact that it becomes possible to
issue CAT control commands to the radio (if supported) so he's not stuck on
one frequency. You definitely aren't getting an MCU to do that, and be a serial
network adapter, in a timely fashion!
73
-Jackson W2TAZ
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