Downgrade to Latest Firmware on UM3 because 5.2.11.20190503 Sucks!

[tkamsker 1]

Hi , 

i run Ultimaker 3 a lot since i gut it in december last year. No problems did always firmware upgrades. Now first time last week print stopped in the middle and API sayed something of reason reboot 

ok but now i have an 20 Hours print in the making and (it runs in the cellar ) i lost connection to the printer Cura 3.6.0 didn't show anything and web browser showed swagger and api did respond but no picture. 

i ran down happily the printer printed when i came down i tried curl -X GET --header 'Accept: application/json' 'http://192.168.178.33/api/v1/system' and looked ok at curl -X GET --header 'Accept: application/json' 'http://192.168.178.33/api/v1/printer'

i got ok answer and curl -X GET --header 'Accept: application/json' 'http://192.168.178.33/api/v1/print_job' showed ok but video didn't work at all 

 

an hour later video worked ? So how can i avoid that or how can i switch back to last version which seemed stable till you fix that behavior 

 

funny extra fact curl -X GET --header 'Accept: application/json' 'http://192.168.178.33/api/v1/camera'  shows an 404 ! even if Cura shows now the film ? 

 

so what is the best to do ? thx thomas 

[Smithy 1,141]

You can fix the video stream by doing a "Cura Connect Reset" this solves the problem by now, but it can come back again. A downgrade to get rid of this problem will not help, because this problem exists also in former firmware versions.

 

If you want to downgrade you need a recovery image and an SD card. There are some threads here with instructions on how to do it.

[tkamsker 1]

Hi this means when i do a Cura Connect Reset then the API will show pictures right ? 

Where can i read which side effects are to be expected. I will do that after my 20 hrs print is finished thx thomas 

[Smithy 1,141]

I cannot say if it "repairs" something with the API, but usually if the webcam is not working anymore, showing nothing or cannot connect, a Cura Connect reset helps. There are no side effects, except if you have grouped more than one UM printer to a group (then you would need to set up the group again). So no settings are lost and it is not comparable with a factory reset.

[tkamsker 1]

Hi i did as you said but i still get an 404 

i use web client like http://192.168.178.33/docs/api/#!/Camera/get_camera_feed

and there i get request http://192.168.178.33/api/v1/camera/feed and 404 

same when i do just camera so the reset didn't work 

 

anything how to check that ? because i will implement this weekend the rest api on my software but sooner and later i would like to allow an view on the printer from remote

thx thomas 

[tinkergnome 926]

On 5/26/2019 at 4:21 PM, tkamsker said:

funny extra fact curl -X GET --header 'Accept: application/json' 'http://192.168.178.33/api/v1/camera'  shows an 404 ! even if Cura shows now the film ?

 

i don't know how the camera API is intended to work, Cura uses the following URL to receive the camera stream:

http://192.168.178.33:8080/?action=stream

 

[CarloK 201]

The camera API is hardly used by anyone and that's why we only received the report of it being broken a few weeks ago. It is broken since v5.1.

 

As tinkergnome says, the API redirects to the mentioned camera stream link and I think Cura uses that directly.

[tkamsker 1]

Hi, 

i write an 3D Print Service software so the system will notice when you change the material and so on but people are used to have some pictures like octoprint so sooner or later at least pictures should be possible to fetch but it isn't MVP 

thx thomas