Mqtt Public Brokers Online:
Assuming you came across with this post because your are willing or working on a application based on MQTT (MQ Telemetry Transport protocol ) and understand the importance of the broker for an Internet of Things architecture . If not , please have a go reading this overview documentation from IBM ( pdf ).
As follows you will find a very quick reference for some of the brokers I have used for a while, tested and very reliable. Those are completely free and very approachable for prototype and test your solution.
- broker.hivemq.com (port 1883).
- broker.mqttdashboard.com (port 1883).
- iot.eclipse.org (port 1883).
- test.mosca.io (port 1883).
However if your wourld like to try your own private broker , have a look of this post , which describes a quick reference for make your raspberry pi a MQTT broker.