GatewayW5100MQTTClient - Setup Best Practice

[Matt Pitts]

Hi There,

I have been getting up and running with OpenHAB and mysensors over last few months and I just wanted to check with more experienced people my setup, as I have a few questions about connecting to openHAB. I've already spent a quite a few hours trawling through other posts on the forum and not found the answers to my questions.

My setup is as follows:
I have OpenHAB running nicely on a raspberrypi2
I have two mysenors measureing temp and humidity working nicely
I have Mosquitto up and running on the pi2 which is getting messages from my sensor nodes quite nicely too
I have setup the mqtt binding with OpenHAB and I have been able to get my temp and humidity data into OpenHAB, which is great.

My questions relate to topics and subscribing in OpenHAB? When I uploaded the GatewayW5100MQTTClient sketch I left everything as default but I see that it's possible to change publish and subscribe prefixes,

1. What prefixes do people recommend to use??
2. If I have added MQTT items in my items file Do I also still need to setup my binding configuration in the openhah.cfg file??

Having read carefully through the MQTT binding wiki, I'm still a little unclear about these??

#######################################################################################
#####                        Binding configurations                               #####
#######################################################################################
mqtt-eventbus:broker=tcp://localhost:1883
mqtt-eventbus:stateSubscribeTopic=/mygateway1-out/${item}/state

I'm not even sure if these bindings are correct??

When I loaded up the humidity sketch I defined the node ID as 3 and I get the following as my default topic mygateway1-out/3/0/1/0/1 for that node

This isn't that meaningful and I was wondering how I make them more meaningful???

Any guidance on the best practice for all of these setting would be very much appreciated.