Hi,
Are you sure you flashed the bootloader as described here? Without it the flashed firmware won’t work. After you do that please send me memory dump. You can obtain it using stm32loader (community topic):
1. Stop services:
$ sudo systemctl disable husarnet-configurator
$ sudo systemctl stop husarnet-configurator
$ sudo systemctl disable husarion-shield
$ sudo reboot
2. On rosbot run:
$ sudo stm32loader -c upboard -r -l 65636 memory_content
$ arm-none-eabi-objcopy -I binary -O ihex memory_content memory_content.hex
Send me memory_content.hex file back.
3. Restart husarnet-configurator
$ sudo systemctl enable husarnet-configurator
$ sudo systemctl restart husarnet-configurator