How to use Paho-MQTT with local javascript on WebIQ

[MaciejGroszyk]

Hello,

I am trying to connect to external broker mosquitto running local on my computer using lib-mqtt-paho libray or local javascript on WebIQ. It works fine from WebIQ Designer by Open preview level, but when I run project from Open Browser Preview or WebIQ Runtime  I got error: "paho-mqtt.js:1046 WebSocket connection to 'wss://192.168.1.103:8090/' failed" and paho onFailure errorCode return 7. 

mosquitto.conf 

listener 8090

protocol websockets

socket_domain ipv4

require_certificate true

use_identity_as_username true

cafile path_to_crt_file

keyfile path_to_server_key_file

certfile some_path_to_crt_file

tls_version tlsv1.2

and I can connect to broker via MQTT Explorer.

How can I upload certificates file to paho.MQTT.Client (lib-mqtt-paho)?

How can I upload certificates to WebIQ Runtime? I have tried uploading via WebDAV, but there is no WebIQ Runtime folder. Will it be enough to configure WebIQ Runtime listen port with certificates enough to connect to broker?

[webiq-sk · Accepted solution]

1. When using the Paho MQTT example WebIQ is not connected to MQTT, rather only your browser is connected to MQTT. If you want to use MQTT with WebIQ, you can use the MQTT-to-OPC-UA server that you can download in the customer area for free.

2. All questions regarding Paho MQTT can be addressed at e.g. StackOverflow: https://stackoverflow.com/questions/tagged/paho as this is an open-source project.

3. You can upload TLS certificates and configure them using the Runtime Manager: http://<CORE IP>:10123, however :

4. As mentioned in 1. the certificate issue when using Paho in the browser is between your MQTT broker and your browser with WebIQ not involved. So the question would probably rather be "How can I setup TLS certificates on my MQTT broker?"