@dc42 it's any store where can i buy a version with 3.1.1 uploaded or the previous version of board? Thanks

@dc42 Hi dc42,
That's not the first duet3hc expansion board that i'm using, i've uploaded the firmware very well in many boards.
With the last version of board( V1.01) is not possible to upload this firmware.
Did you think that is a problem of this single board or the new version of board?
Thanks

@phaedrux Hi,
I'm starting from this situation:
m122 b0
=== Diagnostics ===
RepRapFirmware for Duet 3 MB6HC version 3.4.0 (2022-03-15 18:57:24) running on Duet 3 MB6HC v1.01 or later (standalone mode)
Board ID: 08DJM-9P63L-DJ3S0-7J1FL-3S46L-KSK38
Used output buffers: 1 of 40 (20 max)

m122 b1
Diagnostics for board 1:
Duet EXP3HC firmware version 3.4.0 (2022-03-15 08:59:40)
Bootloader ID: SAME5x bootloader version 2.3 (2021-01-26b1)
All averaging filters OK

the boards works well.

I upload the ZIP file of 3.1.1 (https://github.com/Duet3D/RepRapFirmware/releases/download/3.1.1/Duet2and3Firmware-3.1.1.zip)
confirm to update
AFTER
m122 b0
=== Diagnostics ===
RepRapFirmware for Duet 3 MB6HC version 3.1.1 running on Duet 3 MB6HC v1.01 or later (standalone mode)
Board ID: 08DJM-9P63L-DJ3S0-7J1FL-3S46L-KSK38
Used output buffers: 1 of 40 (20 max)

m122 b1
Error: M122: Response timeout: CAN addr 1, req type 6024, RID=12

the Expansion board diag LED don't blink and don't response to the mainboard.

@Phaedrux
For this moment i'm not planing to update this firmware, i understand that is a good update but for now the timing don't alows me. I don't understand why this board is not retro compatible? There is any reason?

@dc42
Hi,
This error is generating when i try to upload the official release. First at all i want to install the official release then i proceed with the customized firmware.

@danielpetrea Anyone who can assit me to solve this problem? Thanks

@jay_s_uk i'm using this firmware with other machines and works well, i don't encountered CAN problems with 3.1.1.
What's the difference between Duet3 EB 3HC v1.0 and Duet Eb3HC v1.0.1 ?
Thanks

@jay_s_uk said in Duet3 Expansion Board 3hc blocks during downgrade:

s Bad firmware CRC

do you know what should be the cause to this error? i tried to install the firmware 3.1.1 with hard reset procedure (all swich off and then power on) but don't upload this firmware

@jay_s_uk after uploaded the bootloader 1.3 on expansion board 3hc , the status led blinks 3 times.
Do you know what this is meaning? thanks

@jay_s_uk i uploaded the bootloader 2.3 but when i upload firmware 3.1.1 the expansion board don't work (led status not blinking).