I seem to be having a lot of problems of late. Today's quest is I'm trying to group some nodes. THEY WON'T! I've tried to group just a few, they too won't group. Other nodes - near by - will group. Want screen shots? Though I can't see how it would help. Oh, full run down of setup: [Screens…

Andrew, you might find this flow useful. It is designed to send to MQTT using retained topics but you can simply dump it to a global variable and output to debug when needed if you prefer that. [{"id":"16c80b3b.96b455","type":"inject","z":"d0860be6.7951b8","g":"22b622da.95bf8e","name":"","props":[{…

I'm not sure this would help Andrew, or confuse him more :wink: It looks like it is somewhat customised for your particular install. If you want to try it Andrew, then try this modified flow - [{"id":"16c80b3b.96b455","type":"inject","z":"32bc1133.9bf706","name":"","props":[{"p":"topic","vt":"str…

[image] Sean-McG: It looks like it is somewhat customised for your particular install. There is only 1 part that is custom that I'd forgotten about. In the first fn node, remove the 2 lines that refer to require and add os as a module in the setup of that node. I wrote that long before adding…

Running the slightly modified flow. [Screenshot from 2025-06-11 08-19-36] Working here. I'll put it on the RasPi ASAP. Though the one error is of slight concern.

Here is a small tweak I did which MAY be better for people. But I can't get the node-red last restarted value to work. (on the Ubuntu machine at least) [{"id":"53755bb120c6ceb8","type":"exec","z":"65c9b63cb09879a0","command":"npm list -g node-red --depth=0 | grep -oP 'node-red@\\K[^@\\s]+'","addp…

Well there is a problem that the sudo command needs the password. Sorry. AND... sudo systemctl show nodered | grep -oP 'ExecMainStartTimestamp=\K.*' | xargs -0 date -Iseconds -u -d [sudo] password for me: date: invalid date ‘Wed 2025-06-11 07:40:14 AEST\n’ invalid date probably won't help.

Just to check: (with either/both) This flow is seemingly ONLY for machine identification. NOTHING to do with catching errors or the like. Just so it is clear in my mind and there is no mistakes.

This code works on my UBUNTU NUC [{"id":"d02cb65efee301f1","type":"exec","z":"65c9b63cb09879a0","command":"systemctl show nodered | grep ^ExecMainStartTimestamp= | cut -d= -f2-","addpay":"","append":"","useSpawn":"false","timer":"","winHide":false,"oldrc":false,"name":"Node-RED restarted last?","x"…

Yeah it's just an old flow Julian posted to get some system info. Several things didn't work on my Pi running Bookworm, hence the modified flow. It seems there are some differences with Ubuntu and Debian also. Give this a try on Ubuntu [{"id":"53755bb120c6ceb8","type":"exec","z":"32bc1133.9bf706…

For the fun of it. The one I posted works on both. THOUGH: BOOKWORM -- can't say. Yours doesn't work. ERROR 123 on the nodered last restarted node.

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GROUP SELECTION not working. NR 4.0.9

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Sean-McG 11 June 2025 01:20 25

Done -

Topic		Replies	Views
:tada: Node-RED 1.1.0-beta.2 released News	19	2519	17 June 2020
:tada: Node-RED 1.3.3 released News	18	2673	22 June 2021
:tada: Node-RED 1.0 Released News	71	5156	25 January 2020
Code=killed, Status=4/ILL General General	24	2402	15 October 2021
:tada: Node-RED 1.1.0-beta.3 released News	93	3933	30 June 2020

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GROUP SELECTION not working. NR 4.0.9

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