DL2MAN wrote: ↑10 Jul 2022, 22:28
NT1K wrote: ↑09 Jul 2022, 22:39
The one I am trying now is from early on when the first Aliexpress units were available (Yeah, I finally got it put together). It had a serial number upon power on so I skipped loading the bootloader and went stright to attempting to flash it with the firmware.
This is all done using an Arduino UNO that I used without issue on my first unit.
(...)
Flash Firmware only via USB. DO NOT USE Arduino UNO for that. Please follow my Firmware Upload Page word by word. It has a meaning after all
73 Manuel, DL2MAN
I am trying to re-flash the Bootloader. I tried to follow your bootloader instructions (
https://dl2man.de/3a-trusdx-bootloader/) but there discrepancies between what you suggest and the screen shot you have when it comes to using AVRDUDESS.
For example in the text of the website you list "Programmer: Arduino" but the screenshot image shows "Amtel AVR ISP". You also have the buad rate shown as 19200. However, in my situation it won't communicate unless the buad rate is 115200.
When I try flashing the Bootloader, it appears to erase and flash the bootloader but it appears something with setting the fuses isn't working. Please see the following screenshot.
https://i.imgur.com/E1uE3zX.png
I am using the Arduino to load the bootloader.
If I did something wrong previously (which is possible), I am trying to see if I can start over or fix what happened.