Accessing Node-Red on RasPi Standalone Network

General
1

Hi, I'm a beginner working on a Raspberry PI 3 Node-Red project.

I first connected the Raspberry PI on my home Wifi and created a flow and UI by connecting to node-red over the network using the web-browser on my laptop

My project will be used in a remote location without internet, so I want to create a standalone network hosted by the Raspberry PI. I followed this tutorial : https://www.raspberrypi.org/documentation/configuration/wireless/access-point.md

Now, when I'm connecting to the standalone network with my laptop, I can't access Node-Red with the web-browser. Only way I can access node-red now is directly from the Raspberry PI.

Am I doing something wrong ?

Thank you,

2

what IP address is the Pi now using ? usually it is part of setting up the access point. You have to point your browser at that with port 1880... so http://{access_point_IP}}:1880

3

Thank you for the fast reply,

I''m using the IP suggested in the tutorial: 192.168.4.1 and tried accessing Node-Red with both http://192.168.4.1:1880 and http://{hostname}:1880 without success

Odd thing is that I also run Grafana on the Raspberry PI and can access it successfully using port 3000. I tried running node-red on a different port, but without success.

4

can you log into the Pi via ssh ? - If so can you then check that Node-RED is running ? (by using node-red-stop and node-red-start commands and checking the log that then gets displayed)

5

Yes, I'm able to log into the Pi via ssh. I did not try the stop and start commands, but was able to confirm that Node-Red is running by accessing it directly from the Pi browser (Plugging in a monitor and a keyboard + mouse). Do you think the start up log could give me more details on why I can't access Node-Red over the Pi network ?

Thanks

6

Is your firewall allowing traffic to access port 1880 on your device? That would be an explanation why you can reach it locally but not remotely.

7

When you say you can't access it, exactly what do you see on the browser?
Also what do happens if, in a terminal on the PC, you run
wget http://192.168.4.1:1880
and finally, if running the browser on the Pi what if you enter http://192.168.4.1:1880 ?

8

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