Mosquitto On Two Devices [SOLVED]

Setup, Configuration and Use Runtime
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1

Might need a bit of help with mqtt with this one.
I have mosquitto running on two devices as follows:
192.168.1.106 hosting OH2 (openhabian) and localbrokerrb
192.168.1.103 hosting node-red running 24/7

I send mqtt messages from a couple of Sonoff devices (and some others but not relevant) and want to exchange messages with both of the above.
I want to use a rule in OH to send an mqtt command. At the command line on the OH machine this works fine: mosquitto_pub -h 192.168.1.103 -t cmnd/sonoff2/POWER -m 1

But have not been able to get the rule to send the message.
The item line looks like:
Switch WT_Waterpump "Water Pump" { mqtt=">[192.168.1.103:cmnd/sonoff2/POWER:command:*:default],<[192.168.1.103:stat/sonoff2/POWER:state:default]" }

and the rule :

when
Time cron "0 29 16 * * ?"
then
sendCommand(WT_Waterpump, ON)
postUpdate(WT_Waterpump, ON)

end
But no action results at the Sonoff. After reading the man for mosquitto I have added the two addresses to the .conf file this : address 192.168.1.106:1883 192.168.1.103:1883
This also does not give me the result.
Any tips on how I can work with mosquitto on two devices?

2

It looks like what you want to do is to configure one of your Mosquitto servers as a bridge. Google will be your friend, here just the first example that popped up:
http://www.steves-internet-guide.com/mosquitto-bridge-configuration/
I have ne personal experience with this, however.

3

@lipp_markus Thanks for the tip on the keyword “bridge”. Implemented and working nicely.