Can't "see" older ATmega328P board

1

I’ve a HMBGC V2.2 (a gimbal controller). I had burnt the bootloader onto it ages ago (about 7 years ago) using destructions at https://docs.arduino.cc/retired/hacking/software/Bootloader/ .

To test the boot loader I had bombed the board with blink and then it went into a drawer.

I have just now pulled it out to put it to use and plugged it in and it’s still blinking a treat.

But platformio does not recognise it.

The board was set up as an “Arduino Pro or Pro Mini”.

So this time around my ini file is setup:

[env:pro16MHzatmega328]
platform = atmelavr
board = pro16MHzatmega328
framework = arduino
lib_extra_dirs = ~/Documents/Arduino/libraries

Listing platformio “Devices” shows naught in the device list.

Is this a boot loader out of date problem?

I’m not having problems with my ESP32 setups.

I’m running on Ubuntu 22.04.5.

2

So no USB device even shows up? When you do the following:

  1. Unplug the device / USB cables
  2. Open a new terminal and type sudo dmesg -w
  3. Press Enter once to create a separation
  4. Plug the USB cable back in

What new output is created?

3

It turned out I somehow (probably via an update) had brltty (for Braille hardware) clobbering my ttyUSBx. Found the following:

usbfs: interface 0 claimed by ch341 while 'brltty' sets config #1
ch341-uart converter now disconnected from ttyUSB0

I uninstalled brltty and finally had ttyUSB0 in the list. I got distracted with FTDI drivers (dmsg | grep FTDI came up naught) but realised the ancient CH340 on the board was not FTDI so all good now. I still had to fiddle with upload speed in the end but now I seem to be able to bomb the board.