Dymo 550 Thermal Printer DRM Hacking

[voltsandjolts]

Maybe a strange thought, but can we not find a way to flash the firmware of the older 5XL's to the new ones?

That would require the extraction of firmware from the STM32 MCU in the older 5XLs.
That's not easy because of security features in the STM32 MCU.
But it might be possible, some folks have had success in bypassing those security features, as mentioned above in reply #143

[ballfanta]

I purchased my 5XL a while ago, my SN is QG1340XXXXXXA so obviously mine works fine with the hack. It is so disappointing to find that they seem to have actively blocked this .

@js_12345678_55AA any further progress on working around dymos latest effort?  I can scan my 4x6 labels.  I have another 5 rolls that i need to find at the house or i can um scan some at the local supplier. and also thanks for your efforts.

Does anybody know the sequence of the serial numbers, that we know at least which one the old hack works and for which one the new hack is needed.

Maybe for me to start

I have a 5XL bought last year which is working: QG1450022xxxA
I have a 5XL this year (bought in April) which is not working: QG2350146xxxA

I don't share the full serial number, never now who's reading it .

Maybe a strange thought, but can we not find a way to flash the firmware of the older 5XL's to the new ones?