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This page provides an overview of public LinkSmart services and demos:

MQTT Broker

This is a public Mosquitto MQTT broker that can be used freely for a variety of IoT application.


The communication with the broker is encrypted with a CA signed certificate. Example usages are provided below.

Mosquitto Client


Mosquitto client does not use the system root certificates, so we must provide a CA bundle certificate.

Here, we'll download and use CA certificates extracted from Mozilla:

curl -O

Subscribe to all (#):

mosquitto_sub -h -p 8883 -u linksmart -P demo -d --cafile cacert.pem -t "#"

Publish to "test" (your are only allowed to publish below LS):

mosquitto_pub -h -p 8883 -u linksmart -P demo -d --cafile cacert.pem -t "LS/test" -m "hello there"



Enable SSL and provide the username and password:

Subscribe to # to see what is currently being published to the broker. Or just publish some test messages yourself (your are only allowed to publish below LS):


We use Grafana to view and analyse a variety of sensor data. LinkSmart provides the following Grafana Plugins:

NamePlugin PageDemo
LinkSmart SensorThings
(Data source plugin for visualizing OGC SensorThings sensor and location data.)

LinkSmart HDS
(Data source plugin for visualization of data from LinkSmart® Historical Datastore


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