Controlling a RaspberryPi GPIO pin with MQTT - Tutorials & Examples - openHAB Community
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MQTT Based Raspberry Pi Home Automation: Controlling Raspberry Pi GPIO using MQTT Cloud
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GitHub - BitStab/pi-mqtt-gpio: Expose GPIO modules (Raspberry Pi, Beaglebone, PCF8754, PiFace2 etc.) and digital sensors (LM75 etc.) to an MQTT server for remote control and monitoring.