is there any guide on how to update the firmware?

[CovertError]

I have the Yard Stick one and I'm looking for I guide on how to the firmware so what I did was
rfcat --bootloader --force
to varify I did
rfcat_bootloader /dev/RFCAT5 verify /opt/rfcat/firmware/CCBootloader/CCBootloader-rfcat-ys1.hex
and this is what I got
Something is talking to the RfCat dongle (Modem Manager, most likely). Retrying again after 5 seconds. This can take a minute, please be patient. (error: SerialException(2, "could not open port /dev/RFCAT5: [Errno 2] No such file or directory: '/dev/RFCAT5'"))

[ReCaTraDi]

"could not open port /dev/RFCAT5: [Errno 2] No such file or directory: '/dev/RFCAT5'"

Are you sure that /dev/RFCAT5 serial exists)? I had same error when I was typing wrong serial. Try /dev/ttyACM0

[grvvy]

Install instructions

[CovertError]

"could not open port /dev/RFCAT5: [Errno 2] No such file or directory: '/dev/RFCAT5'"

Are you sure that /dev/RFCAT5 serial exists)? I had same error when I was typing wrong serial. Try /dev/ttyACM0

So I tried that but it also didn't work I think my issue is trying to find the serial location

[CovertError]

Install instructions

I will try that and get back to you but thanks

[ReCaTraDi]

You can try checking the amount of serials by typing command (ls /dev/).
If amount of serials when you pull in or out yard stick didn't change than you have troubles installing rfcat on your os.