Brontekst bekijken van Ultimaker Buildplate Camera

[[Category:Nodes & network devices]]
= Use =

Login in [https://mijn.makerspaceleiden.nl mijn.makerspaceleiden.nl] and in the navigation menu select Live 3D printer camera.

[[Bestand:Buildplate1.png]]

[[Bestand:Buildplate2.png]]

= Setup =

The ultimaker buildplate camera relies on a SSH tunnel provided by the service:

   [Unit]
   Description=Tunnel for the ultimaker camera
   After=network.target
   
   [Service]
   ExecStart=/usr/bin/ssh -N -i /etc/ultimaker-tunnel -l tunnel -p 222 -T -o ServerAliveInterval=60 -o ExitOnForwardFailure=yes -L 127.0.0.1:9998:CAMERAIP:8080 volmolengracht -
   RestartSec=30
   Restart=always
   
   [Install]
   WantedBy=multi-user.target

The key has been created with:

    ssh-keygen -f  /etc/ultimaker-tunnel 

And a 'permit' line for this has been added to the .ssh/authorized keys file on the space-side:

    no-pty,permitopen="192.168.6.12:8080",command="/bin/true"  ssh-rsa AAAA....= 

With the 'ssh-rsa AAA...' taken from /etc/ultimaker-tunnel.pub.

Note that this has to be done in the admin interface; under users (not in ~/.ssh; that file is automatically overwritten) - and need to be given 'tunnel' permissions.

At this port on the Ultimaker; there is a webcam module that accepts two rest calls (AFAIK): '''?action=stream''' en '''?action=snapshot'''. We take the latter to not overload things (and not having to deal with async streaming, etc).

The connection is then reverse proxied by the ultimaker module in [https://mijn.makerspaceleiden.nl mijn.makerspaceleiden.nl] (https://github.com/MakerSpaceLeiden/makerspaceleiden-crm). The key config is in views.py:

    def snapshot(request):
       img = requests.get("http://127.0.0.1:9998/?action=snapshot").content
       return HttpResponse(img, content_type="image/jpeg")

With the updating done by a few lines of javascript - see https://github.com/MakerSpaceLeiden/makerspaceleiden-crm -> '''ultimaker/templates''' and then index.html