Thingsmatic published a way (Python Script) how to set up a Raspberry Pi to gather its own board temperature values and publish these via MQTT to a MQTT Broker.
This allows you to distribute the data further to all kinds of automation services like Home Assistant etc.
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> thingsmatic.com/2017/02/01/self-monitoring-a-raspberry-pi-with-mqtt/ <thingsmatic.com/2017/02/01/self-monitoring-a-raspberry-pi-with-mqtt/>