MQTT - stuck.

[lerner]

Hi folks,

"I'm ba-ack!"....

My MQTT interest has again been spiked and I am doing some reading on getting it working,

Alas, not all good news.

I can get it to talk "locally" but it falls over when I wan to talk machine to machine.
I also shall say that I may have had an "older" version of MQTT but after reading I found a link to the CORRECT version - or so I believe.

As the thread is OLD, I am asking anew.
But this is the cux of it:
(No offence Dougie)
viewtopic.php?p=1072534#p1072534

by DougieLawson » Mon Nov 09, 2015 11:33 pm
Nope. It's because you mosquitto server is not listening on the inaddr-any address.

Take a look at your mosquitto.conf, is there a "listener" line in there? Change

Code: Select all
listener 1883 127.0.0.1

to

Code: Select all
listener 1883

Um......... There is no line in /etc/mosquitto/mosquitto.conf that says that.



I used the walk through from:
http://mosquitto.org/2013/01/mosquitto- ... epository/
which was referenced in the above thread.

But all the "examples" given /that I find are for LOCAL stuff.
They don't go into the "between two separate machines" scenario.

On the one machine I get the messages sent through, but if I try from Machine 1 to Machine 2, it says

Code: Select all

mosquitto_pub -d -t test -m "Test"
Error: Connection refused

Yeah, right..... And I can't see how to get around that.


Thanks in advance.

[pieuser]

i have installed geany in raspbian and its working fine. but when i try to install mqtt mosquito its successfully installed but its not connecting in server to client and vice versa. is raspbian is not sufficient for mqtt and iot.

[rpdom]

i have installed geany in raspbian and its working fine. but when i try to install mqtt mosquito its successfully installed but its not connecting in server to client and vice versa. is raspbian is not sufficient for mqtt and iot.

Please don't hijack unrelated posts.

[pieuser]

is there any solution for this problem or no solution for this.

[DirkS]

On the one machine I get the messages sent through, but if I try from Machine 1 to Machine 2, it says

Code: Select all

mosquitto_pub -d -t test -m "Test"
Error: Connection refused

.

The program has to know where your mosquitto server is.
It assumes 'localhost' when none is given.

Code: Select all

mosquitto_pub -h yourmosquittoserver -d -t test -m "Test"

[lerner]

From what I can see about "Geany", that is a text editor type program.

What does that have to do with MQTT?

[lerner]

On the one machine I get the messages sent through, but if I try from Machine 1 to Machine 2, it says

Code: Select all

mosquitto_pub -d -t test -m "Test"
Error: Connection refused

.

The program has to know where your mosquitto server is.
It assumes 'localhost' when none is given.

Code: Select all

mosquitto_pub -h yourmosquittoserver -d -t test -m "Test"

Can you please indulge me how to then tell it where to send it then?

As I explained: Following what I read on the posts referenced in the first post, it doesn't explain how to do that.

[DirkS]

On the one machine I get the messages sent through, but if I try from Machine 1 to Machine 2, it says

Code: Select all

mosquitto_pub -d -t test -m "Test"
Error: Connection refused

.

The program has to know where your mosquitto server is.
It assumes 'localhost' when none is given.

Code: Select all

mosquitto_pub -h yourmosquittoserver -d -t test -m "Test"

Can you please indulge me how to then tell it where to send it then?

As I explained: Following what I read on the posts referenced in the first post, it doesn't explain how to do that.

Euh... as I showed: use the -h parameter. Use name (e.g. rasperrypi.local) or IP address as the parameter
See https://mosquitto.org/man/mosquitto_pub-1.html

[bensimmo]

If it's not twigged.

-h yourmosquittoserver

Is the bit you are sending to as an IP 198.1.1.34 or its network name.
-h 198.1.1.34
-h PiAtHome.local
-h lerner.dyndys.org


(I've never used it, but reading so I can at some point).
Either way the first one need the IP to be reserved in the router for the Pi otherwise it might change. The second needs it to actually work on the network like that, the third is if you are trying from outside your network etc)

[jamesh]

i have installed geany in raspbian and its working fine. but when i try to install mqtt mosquito its successfully installed but its not connecting in server to client and vice versa. is raspbian is not sufficient for mqtt and iot.

Please start a new topic for this.

[lerner]

As I explained: Following what I read on the posts referenced in the first post, it doesn't explain how to do that.

Euh... as I showed: use the -h parameter. Use name (e.g. rasperrypi.local) or IP address as the parameter
See https://mosquitto.org/man/mosquitto_pub-1.html

Thanks. Somehow I missed that.