Hello David,
thanks for detailed explanation to my questions.

According you your suggestion I will definetelly use a new SD card.
Could you please write how to make a backup of my current firmware (second point in your post).

Thanks

Hello All,
I have a questions related to update of my Duet 0.85 firmware as well as DuetWebControl.
My 3d printer has a Duet board with old firmware (see below information) because I have never updated it. Today I would like to install latest and stable revision.

Current information about my printer software from DuetWebControl :
Firmware Name: RepRapFirmware
Firmware Version: 1.10+4 (2016-03-30)
Web Interface Version: HTML: 1.11, JS: 1.11

Two weeks ago I found instruction (https://duet3d.dozuki.com/Wiki/Installing_and_Updating_Firmware#Section_Updating_more_than_one_firmware_at_a_time) how to perform firmware update but I did not find clear information how the process shall be done in my case.

Could you please help me to answer following questions?

• Shall I update the soft directly from my current version to latest (e.g. 1.21) or maybe should I make the update in few steps -> update to e.g. 1.18 and then to 1.21.?
• In the instruction I attached above for some cases (e.g. for “Upgrading a Duet WiFi to firmware 1.19 or later from 1.18.2 or earlier”) it is required to write some gcode commends. What about my case, shall I write some codes during update?

Thank you in advanced for your help.