firmware downgrade problems

[Tricep terry]

Dear Duet,

I'm facing difficulties with downgrading the software from 3.3 to 3.1.1, I prefer to use the old heating algorithm, which is why I would like to downgrade, however, after uploading the zip file, the system asks to install it, and after rebooting, in the system tab, it shows that it indeed uploaded and installed the firmware, however when I send M115, it shows that it did not correctly upload the new firmware, see appendix.

Kind regards,
Max

[jay_s_uk]

@tricep-terry you're probably missing the IAP file as its just downgraded DWC.
IAP file from the 3.3 release and put it in both system and firmware and then try the downgrade again

[Tricep terry]

@jay_s_uk

Hi, I'm not sure which IAP file you mean, do you mean the Duet2_SDiap32_WifiEth.bin ?

Kind regards,
Max

[jay_s_uk]

@tricep-terry yes, thats it

[Tricep terry]

@jay_s_uk

The files was presented in both folders, and both folders seemed to contain all necessary files, making a back up now, and will than put the sd card back in, will let you know in a few minutes.

Max

[Tricep terry]

@jay_s_uk

Replaced the files and it worked!

What gave it away? just curious how you new this was the problem so fast!

Kind regards,
Max

[jay_s_uk]

@tricep-terry just a hunch after they changed where the firmware files were placed. When the firmware won't downgrade, the IAP file is usually the cause