– Copied from customer query –
What is the difference between the two versions of UbiSwitch?
The only change between revision A and revision B is that revision B is that we changed from STM32L031F6P6 to STM32G071K8U6. No changes to mechanical or functionality (other than the new command line interface).
What we found is that while we were developing the firmware, we were running out of space on the L0, with only 32 KBytes of flash, so we had to upgrade to the G0.
It certainly wasn’t something we anticipated, and it is a bit annoying to have two revisions. But it was essential for us because it allows us to add a featured called “update over UART”. This feature means future upgrades to the firmware can be done over serial. All the UbiSwitches we sell now are revision B, and revision A has been sunset.
We do have a version of the firmware that can run on revision A, but it doesn’t have the “update over UART” feature. We’re trying to avoid giving this firmware out in all cases, because it’s a bit of a development “stub”, and not something we plan to keep updated. In some cases we will release it for the customer on the understanding that it’s more of a prototype firmware, not something suitable for production unlike the publicly available firmware for revision B.
Hello, Josh - Would you mind sending the RevA firmware? We have a few of those here which I was told are recent so I attempted to load the new firmware but got an insufficient memory error message. Not surprising with 32k! But now it’s flash is erased.
Would you mind sending the Rev A firmware programming (.hex) file? I would like to restore the firmware in that unit so its available for uses where the CLI isn’t needed.
Many thanks!
(PS: We took a recent UBI switch from inventory and its CLI works great! Thank you!)
Hi Jim,
Revision A of UbiSwitch doesn’t run any firmware, so you don’t need to restore it.