I installed the latest 20.04 image with ROS Noetic. I want to update the firmware, however the /home/husarion/firmware.bin file does not appear to be the same as the rosbot-2.0-fw-v0.14.3-noetic.bin file downloaded from https://files.husarion.com/images/rosbot-2.0-fw-v0.14.3-noetic.bin
I suggest using the one supplied with the system image. It was tested to work with the configuration supplied with it. The other firmware might use different baudrate or message definition for rosserial.