I'm working with Sequent Microsystems RasPi boards on an RPI4. OS, NR and everything else is up to date. I installed nodes for their 3 relays board yesterday, which showed up as expected in a group named Sequent Microsystems. Today I added nodes for 2 more boards (RTD temp sensor and cpu smart fan). After stop/start of the background NR process and refreshing my tab in Chromium, the entire Sequent Microsystems group disappeared. No group. No nodes. I tried reloading the one that worked yesterday. That did not cause the group to reappear. All I have in my tab now is the two test flows that I created - those are running. And I have the OOTB groups and nodes. Any suggestions on how to resolve this - or how to even determine if the Sequent nodes that I loaded are still loaded?
Follow-up: the above was happening in Chromium on the RPI4. I cross-tested from my Win 11 laptop in Chrome - same situation appears there - group gone, nodes gone.
Second update: I discovered User Settings / Nodes and have "module not found" warnings by all Sequent nodes. This is odd, as the 3 Relays nodes were present, thus presumably found, yesterday thru this afternoon when I loaded nodes for the other two boards. 3 Relays had a "requires update" button, which I applied. No errors, and the dialogue indicates successful update to 1.0.1. The item, however, remains in a "module not found" state.
Third update: If I keep writing to myself, I'll eventually solve this problem! Another stop/start and tab refresh corrected the issue for 3 Relays. the Sequent group is back. Nodes for the other two boards remain absent, as those two remain in the "module not found" state. Will research that and post anything I find that works.
Stop node red then start it again in a command window. Copy/paste the full startup log here please. Also post the contents of the file package.json from the folder where your node-red flows are located. If you installed node red using the recommended method for a pi then you can stop and start node-red using node-red-stop node-red-start
Edit: If you uninstall the final nodes that you installed and restart node-red does it recover the situation?
Startup log contains entry "[node-red-contrib-sm-sfan/sfan] Error cannot find module i2c-bus". Am researching that now. Will uninstall the two problem items. My forum login is on a different machine than NR. Will copy log and package.json in a minute.
/usr/lib/node_modules/node-red/red.js
4 Jun 18:11:43 - [warn] ------------------------------------------------------
4 Jun 18:11:43 - [info] Settings file : /home/robert/.node-red/settings.js
4 Jun 18:11:43 - [info] Context store : 'default' [module=memory]
4 Jun 18:11:43 - [info] User directory : /home/robert/.node-red
4 Jun 18:11:43 - [warn] Projects disabled : editorTheme.projects.enabled=false
4 Jun 18:11:43 - [info] Flows file : /home/robert/.node-red/flows.json
4 Jun 18:11:43 - [info] Server now running at http://127.0.0.1:1880/
4 Jun 18:11:43 - [info] Starting flows
4 Jun 18:11:44 - [info] Started flows
Oddly, the i2c nodes show up in their group, as do the nodes for the SM 3 relays board. Clearly there's a disconnect between what the SM fan module (the one I'm using to debug this) is expecting and the way I've loaded i2c.
I have solved the missing i2c-bus module problem and now get an error that rpio cannot be found. Minimal info on this is available on the SM site, and web searches have not shed further light on installing rpio. Startup log follows. Has anyone seen this rpio error?
Welcome to Node-RED
4 Jun 22:20:32 - [info] Node-RED version: v4.0.9
4 Jun 22:20:32 - [info] Node.js version: v20.19.2
4 Jun 22:20:32 - [info] Linux 6.12.25+rpt-rpi-v8 arm64 LE
4 Jun 22:20:33 - [info] Loading palette nodes
4 Jun 22:20:35 - [warn] ------------------------------------------------------
4 Jun 22:20:35 - [warn] [node-red-contrib-sm-sfan/sfan] Error: Cannot find module 'rpio'
Require stack:
As I’d experienced a string of issues, I decided on a clean reinstall from OS up. This time everything went smoothly. I skipped the nodes for the fan card, as I don’t need to control it from NR. The RPI 4 and NR both are working as expected.
