Does the embedded MQTT broker support websockets?

Add-ons Bindings
1

Hi everyone

I’m trying to use a websockets based MQTT client, specifically the Paho JavaScript client.

http://www.steves-internet-guide.com/using-javascript-mqtt-client-websockets/

https://www.eclipse.org/paho/clients/js/

I’m finding the client can’t connect to the broker; I’m getting the following response:

WebSocket connection to 'ws://192.168.1.20:1883/mqtt' failed: Connection closed before receiving a handshake response

The log reports:

[ERROR] [quette.server.netty.NettyMQTTHandler] - Unexpected exception while processing MQTT message. Closing Netty channel. CId=null
java.lang.NullPointerException: null

Before I dig in to try and find out what the issue is, I thought I’d first check that the embedded broker actually supports websockets MQTT sessions!

Thanks

2

The moquette broker itself supports websockets, but the openHAB service does not enable it.

3

Thanks David, that explains it!

I removed the embedded broker and switched to a Mosquitto installation on the same machine; that got it all working.

cheers