Controlling only one dashboard session from NodeRed

I have a home automation system in NodeRed with several browsers running Dashboard UI. I have some outdoor cameras with motion detection that activates live video when motion occurs. Working very nice but the video appears on ALL screens/browsers and I would like to limit the video to only one or two screens. Found out I could use the sessionid to pick one screen but the sessionid keeps changing...

I manually store the sessionid in a flow variable by pressing a button in the selected browser and use it like this:

[{"id":"65c3fad08f3dc9d3","type":"ui_ui_control","z":"4d395651357ab1b1","name":"ui control","events":"connect","x":1260,"y":920,"wires":[]},{"id":"36f82dc7dd8f6f5f","type":"change","z":"4d395651357ab1b1","name":"GarCam","rules":[{"t":"set","p":"url","pt":"msg","to":"","tot":"str"},{"t":"set","p":"payload","pt":"msg","to":"Innkjørsel","tot":"str"}],"action":"","property":"","from":"","to":"","reg":false,"x":860,"y":950,"wires":[["199728487f30702d"]]},{"id":"199728487f30702d","type":"change","z":"4d395651357ab1b1","name":"Show Videopage","rules":[{"t":"set","p":"payload","pt":"msg","to":"Kamera","tot":"str"},{"t":"set","p":"socketid","pt":"msg","to":"sock1","tot":"flow"}],"action":"","property":"","from":"","to":"","reg":false,"x":1060,"y":950,"wires":[["65c3fad08f3dc9d3","f8858d5ec8804d75","92bb7069eb9483a6","809b154c6b6ea105"]]},{"id":"809b154c6b6ea105","type":"ui_iframe","z":"4d395651357ab1b1","group":"0cf69380855e1696","name":"","order":2,"width":"28","height":"22","url":"","origin":"*","scale":"80","x":1280,"y":950,"wires":[]},{"id":"0cf69380855e1696","type":"ui_group","name":"Video","tab":"8f4c3716a72a96a8","order":1,"disp":false,"width":"32","collapse":false,"className":""},{"id":"8f4c3716a72a96a8","type":"ui_tab","name":"Kamera","icon":"videocam","order":11,"disabled":false,"hidden":false}]

Any way to at least check whether the sessionid still is alive or any other ways to get this functionality?

To complicate the matter a bit, I run 2 Chromium browsers on one RPi 400 and only want one to display the video when motion occurs and some other dashboard tab othervice.

The ui_control node can report new connections - so you can hopefully use that to grab the session ids - and hopefully then work out which came from where - maybe you have to fix ip address of one of them - and then set you flow variable.

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Thanks @dceejay , that did the trick.

The ui_control node reports both socketip and socketid on every refresh so when I receive a socketid from one specific socketip, I store it in flow-variable and use it to display video on one screen. On the RPi 400 with 2 browsers, it probably will be fairly random which one browser that displays the video but that is a minor problem at present.

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as I said - you may be able to fix the ip of at least one of the devices running a browser in which case it should then stick ok. But yes - if dhcp on both then yes you will need to sort it out at startup and hope they don't change :slight_smile:

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Which is why uibuilder now sets a client id which will last for the whole browser session. :wink:

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This is how it looks. These two monitors is connected to one RPi 400 with one Chromium browser on each monitor, both displaying NodeRed Dashboard from the same NodeRed Controller. I simulate motion detected outside and 20 secs later, the video is replaced by the previous tab (just changed the resolution on the monitors so I need to tidy up the design a bit...):

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