EMQ - The Massively Scalable MQTT Broker for IoT and Mobile Applications:
Make sure all these ports are visible on the EMQ Admin Dashboard. If not, may be another broker like Mosquitto, Mosca etc is running. Stop it and restart emqttd.
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Step 1 --- Setup EMQ(emqttd) Broker: (Tested on Ubuntu 18.04)
Download and install the latest stable deb version::
Make sure no other MQTT brokers like Moquitto, Mosca etc is running to avoid port clash.
Start emdttd broker:
sudo systemctl start emqttd.service
Launch the EMQ Admin Dashboard:
http://localhost:18083/#/listeners
user: admin
password: public
Step 2 --- Generate and serve dynamic tags from Ignition as JSON payload:
Follow this link. Download and run the "Ignition-IOT-Nirvana" demo project from github.
*** Make sure ignition_group1.php code doesn't serve more than 500 dynamic tags as JSON api. EMQ broker ignores any JSON payload with more than 500 tags per topic. ****
Step 3 --- Download this repo:
cd mqtt-ignition/
python3 mqtt-publish.py
Just double click and run "simple-mqtt-websocket-example-master/index.html" file. You will see all published messages on the browser.
....... still working on JAVA-MQTT-PubSub client