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Thanks, Colin. I didn't realize the chip is an ATMEGA328. In this
case, the "PIC programmer" is just an UNO with a socketed chip, as
Colin says. I believe most of the rest of what I said is correct.
You don't want to try to download a program from a microprocessor.
If the sketches are available to download, you are good to go. They
are written in a higher level language and probably have lots of
comments to boot (no pun intended).
On 2/8/22 09:53, Colin Evans M1BUU
John is incorrect, the processor is an ATMEGA328 like you
say, programmed via the Arduino environment.
The sketches are available via the Hilltopper groups.io
The easiest way to change the code in the chip would be to
take the chip out of the radio and use an Arduino Uno with chip
socket - some Unos use SMD processors, but a lot of the clones
use DIP chips in a socket.
The Hilltopper chip will already have the bootloader on it,
so once you've put it into an Uno, you can just upload the
sketch via the Arduino IDE.
You could program the processor via J5, but you'd have to
connect up the wires to an external programmer (or even an
If you join the Hilltopper group, you'll find more
Oh, I had a quick search and found this....