Can't connect NodeMCU with MQTT

[swalahamani]

@sivanath

It looks like mosquitto is trying to register both IPv4 and IPv6 on the same port.

If IPv6 is not required for the application your use case, try changing the mosquitto.conf file as below for limiting it to ipv4:

# Set to `ipv4` to force the listener to only use IPv4, or set to `ipv6` to
# force the listener to only use IPv6. If you want support for both IPv4 and
# IPv6, then do not use the socket_domain option.
socket_domain ipv4

Please please make sure the default port 1883 is not already in use by any other programs. If yes, you can either kill those programs (not recommended) or change the port in mosquitto.conf file:

References: [1][2]

[sivanath]

@swalahamani @salmanfaris
I changed my conf file and specified ipv4
And this is the status of the port (from resource monitor):

Image: mosquitto.exe	
PID: 3732
Address: IPv6 loopback
Protocol: TCP
Port: 1883
Firewall Status: Allowed, not restricted

It is listening to mosquito..

[swalahamani]

@sivanath

Is it working now?

[sivanath]

@swalahamani No

[swalahamani]

@sivanath
Did you follow the steps which I mentioned previously?

[sivanath]

@swalahamani Yeah!!

[swalahamani]

@sivanath

Oh okay.

Please bring your device if you're coming for the upcoming MakerChat 0x13 tomorrow (IST). Either I and @salmanfaris or both of us will be there.

Or else we can set up a call sometime this weekend or the next week and sort it out.

Let me know.

[sivanath]

@swalahamani I may not be able to come tomorrow. I think we could set up a call. How can I contact you personally?

[salmanfaris]

@sivanath From your last message looks like the MQTT broker already running on your computer. Could you please try to do a test with nodeRED and see it's working or not.

[sivanath]

@salmanfaris Actually, I can't connect my NodeMCU device with the localhost server. I can establish a connection using the test.mosquitto.org server.
This is my required case: YouTube link