Display CPU Temp from Pi4 on localhost:1880

General
1

I am new to Node-Red. Node-Red is installed on bullseye version of Raspberry.

Started Node Red console on Pi4 and start localhost:1880 in browser.
I create simple nodes that flow from "timestamp" into function node "exec" and end with a "debug" node.

When deployed I receive the message of credentials file using generated key...

I change my setting.js file in .node-red directory by activating credentialSecret: "xxx" - xxx being the key change.

Restart Node Red and deploy again. Still I get the same error message
What to do?

message:
10 Dec 10:29:34 - [warn]

Your flow credentials file is encrypted using a system-generated key.
If the system-generated key is lost for any reason, your credentials
file will not be recoverable, you will have to delete it and re-enter
your credentials.
You should set your own key using the 'credentialSecret' option in
your settings file. Node-RED will then re-encrypt your credentials
file using your chosen key the next time you deploy a change.

10 Dec 10:29:34 - [info] Stopping flows
10 Dec 10:29:34 - [info] Stopped flows
10 Dec 10:29:34 - [info] Starting flows
10 Dec 10:29:34 - [info] Started flows

2

Which settings.js file did you edit?

You should be editing the one listed in the logs a few lines above that message.

And exactly how did you restart Node-RED?

3

Directory: /home/pi/.node-red/settings.js
I stopped node-red in the console and restarted it from console again

4

Can you copy/paste the contents of your settings.js please. When posting code, logs etc please use the </> button at the top of the forum entry window and paste the content in.

5

Show us exactly how you edited the file (with the key suitably blocked out)

(also just to be sure you didn't use sudo to start Node-RED?)

Also did you actually do a deploy after restarting? The creds don't get changed until you deploy (as said in the warning).

6

Changed/saved settings.js in Geany
The only change in settings.js

 credentialSecret: "xxx",

stop & start command console:
node-red-stop
node-red-start

Welcome to Node-RED

10 Dec 12:06:19 - [info] Node-RED version: v2.1.4
10 Dec 12:06:19 - [info] Node.js version: v14.18.2
10 Dec 12:06:19 - [info] Linux 5.10.63-v7l+ arm LE
10 Dec 12:06:20 - [info] Loading palette nodes
10 Dec 12:06:21 - [info] Settings file : /home/pi/.node-red/settings.js
10 Dec 12:06:21 - [info] Context store : 'default' [module=memory]
10 Dec 12:06:21 - [info] User directory : /home/pi/.node-red
10 Dec 12:06:21 - [warn] Projects disabled : editorTheme.projects.enabled=false
10 Dec 12:06:21 - [info] Flows file : /home/pi/.node-red/flows.json
10 Dec 12:06:21 - [info] Server now running at http://127.0.0.1:1880/
10 Dec 12:06:21 - [info] Starting flows

deploy was executed after node-red-start

Thank you Gentlemen for your help and assistance. I have successfully deployed and receive CPU Temp of 34C

1 Like
7

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