Make a digital do-not-disturb sign #piday #raspberrypi @Raspberry_Pi
A simple busy sign using 2 Pis and MQTT. Via MagPi:
In this tutorial we’re going to use a popular messaging protocol, MQTT (Message Queuing Telemetry Transport). With MQTT we will set up a simple do-not-disturb sign that you can trigger with a single key press and customise to your heart’s content.
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