[red] Uncaught Exception: Pointers as to a starting point

General
1

OK, I see one of these each day and I have had a look around the forum and after trying to work out which node may be causing this I am stumped. Don't know how to proceed!
I have tidied up my many flows and now they run with very little syslog noise and I still do not know where to look next.
So, I have included the syslog around the event, enough?
Are there any other logs or sources of information that might help me nail this, is there anything I can add to my flows that might help?

Running on a Raspberry Pi3
[1.2.3: Maintenance Release]

I have upgraded a couple of times since this started, I have even set up a new "Pi" and transferred the flows to it to no solution. It has been a while and I cannot remember what changes/additions I made preceding to this starting.

Mar 26 03:05:25 NodeRed2020 Node-RED[21257]: #033[31m#033[31mBroadlink:#033[0m#033[0m Temperature Data Received - Type 1 Converting and sending.
Mar 26 03:06:25 NodeRed2020 Node-RED[21257]: #033[31mBroadlink:#033[0m Data Received - Determining Type.
Mar 26 03:06:25 NodeRed2020 Node-RED[21257]: #033[31mBroadlink:#033[0m BroadlinkData <Buffer 01 00 00 00 16 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00$
Mar 26 03:06:25 NodeRed2020 Node-RED[21257]: #033[31m#033[31mBroadlink:#033[0m#033[0m Temperature Data Received - Type 1 Converting and sending.
Mar 26 03:07:23 NodeRed2020 Node-RED[21257]: 26 Mar 03:07:23 - [red] Uncaught Exception:
Mar 26 03:07:23 NodeRed2020 Node-RED[21257]: 26 Mar 03:07:23 - Error: Device timeout
Mar 26 03:07:23 NodeRed2020 Node-RED[21257]: at fn.ontimeout (/home/pi/.node-red/node_modules/castv2-client/lib/senders/platform.js:56:26)
Mar 26 03:07:23 NodeRed2020 Node-RED[21257]: at Object.onceWrapper (events.js:420:28)
Mar 26 03:07:23 NodeRed2020 Node-RED[21257]: at fn.emit (events.js:314:20)
Mar 26 03:07:23 NodeRed2020 Node-RED[21257]: at Timeout.ontimeout [as _onTimeout] (/home/pi/.node-red/node_modules/castv2-client/lib/controllers/heartbeat.js:44:10)
Mar 26 03:07:23 NodeRed2020 Node-RED[21257]: at listOnTimeout (internal/timers.js:554:17)
Mar 26 03:07:23 NodeRed2020 Node-RED[21257]: at processTimers (internal/timers.js:497:7)
Mar 26 03:07:23 NodeRed2020 systemd[1]: nodered.service: Main process exited, code=exited, status=1/FAILURE
Mar 26 03:07:23 NodeRed2020 systemd[1]: nodered.service: Failed with result 'exit-code'.
Mar 26 03:07:23 NodeRed2020 systemd[1]: nodered.service: Service RestartSec=100ms expired, scheduling restart.
Mar 26 03:07:23 NodeRed2020 systemd[1]: nodered.service: Scheduled restart job, restart counter is at 36.
Mar 26 03:07:23 NodeRed2020 systemd[1]: Stopped Node-RED graphical event wiring tool.
Mar 26 03:07:23 NodeRed2020 systemd[1]: Started Node-RED graphical event wiring tool.
Mar 26 03:07:32 NodeRed2020 Node-RED[15017]: 26 Mar 03:07:32 - [warn] Projects disabled : editorTheme.projects.enabled=false
Mar 26 03:08:20 NodeRed2020 systemd[1]: Starting Daily apt download activities...
Mar 26 03:08:22 NodeRed2020 systemd[1]: apt-daily.service: Succeeded.
Mar 26 03:08:22 NodeRed2020 systemd[1]: Started Daily apt download activities.
Mar 26 03:08:34 NodeRed2020 Node-RED[15017]: #033[31mBroadlink:#033[0m Data Received - Determining Type.
Mar 26 03:08:34 NodeRed2020 Node-RED[15017]: #033[31mBroadlink:#033[0m BroadlinkData <Buffer 01 00 00 00 16 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00$
Mar 26 03:08:34 NodeRed2020 Node-RED[15017]: #033[31m#033[31mBroadlink:#033[0m#033[0m Temperature Data Received - Type 1 Converting and sending.
Mar 26 03:09:34 NodeRed2020 Node-RED[15017]: #033[31mBroadlink:#033[0m Data Received - Determining Type.
Mar 26 03:09:34 NodeRed2020 Node-RED[15017]: #033[31mBroadlink:#033[0m BroadlinkData <Buffer 01 00 00 00 16 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00$
Mar 26 03:09:34 NodeRed2020 Node-RED[15017]: #033[31m#033[31mBroadlink:#033[0m#033[0m Temperature Data Received - Type 1 Converting and sending.
Mar 26 03:10:34 NodeRed2020 Node-RED[15017]: #033[31mBroadlink:#033[0m Data Received - Determining Type.

2

That appears to be the critical line. It is the castv2-client module that is failing. That is presumably pulled in by a node that you have installed. Probably a contrib node.

If you don't know which one that might be then go to your .node-red folder and run
npm list castv2-client
and with luck it will show you the parent node.

3

OK, when I looked at the syslogs from both before and now they all have that information, I had wondered if that was the significant bit but as there was a lot of other noise that I had tidied up I was getting there.
It was a lot of work to extract all the "castv2-client instances and keep the flows doing their job so your help was invaluable, I used the "nmp-list..." command and that pointed to the same nodes.
I removed the nodes and and replaced with an equivalent (not a perfect, what I want but does the basics function), now it is working without failure.
I will get to let the developer know if I replicate it but for the time being, Many Thanks.
Fixed for Me.

Next time I will have a better idea how to analyse the syslog.
Solved.
This is only the solution because of Colin's, above, suggestion.