Hello,
I finally managed to flash a GT832E_01 board. For the original post describing the board and what I tried, see here: viewtopic.php?f=12&t=8924. I'll add the final procedure there if someone is interested.
However, now that the board is flashed (and works, I'll come back to that), I get a weird issue:
when I connect the tr/rx pins to my FTDI adapter, and monitor the serial connection output on my computer, I get nothing at first. But when I hot unplug/plug the FTDI adapter into the breadboard, I finally get a prompt! The FTDI adapter needs to stay connected to my computer. The board stays connected to the breadboard. Unpluging/pluging the FTDI adapter into the breadboard magically gets me a prompt.
Everything works as expected after that: I can import the ubluepy module and do a bluetooth scan.
Do you have any idea what's happening with the prompt at first? It looks like I'm maybe missing a connection with the board. So far I have:
Tx -> Rx of FTDI adapter
Rx -> Tx of FTDI adapter
Vcc -> 3.3 V
GND -> GND
Any help is appreciated.
You can also see the details of my attempts here: https://github.com/micropython/micropython/issues/6379