MQTT Based Raspberry Pi Home Automation: Controlling Raspberry Pi GPIO using MQTT Cloud | tecno4 | Scoop.it
From circuitdigest.com - June 3, 2019 3:49 AM

In previous tutorial we have discussed about MQTT Protocol and installed local MQTT server on our Raspberry Pi for controlling the GPIO locally. But the drawback of local MQTT server is that we cannot control the GPIOs from anywhere in the world, it only provides services locally. But if this MQTT server is hosted on some cloud then any appliances connected to Raspberry Pi can be controlled globally.

Here, in this tutorial, we will use Adafruit IO as MQTT broker to control an AC appliance connected to Raspberry Pi GPIO. Also check other IoT controlled Home Automation tutorials: