In this video, we will demonstrate how to control GPIO pins on the Orange Pi 4A board using Node-RED. Previously, we covered the installation of Node-RED on the Orange Pi 4A. Now, we'll guide you through using the node-red-contrib-opi-gpio node to manage GPIO pins. We'll cover the installation of this Node-RED node, learn how to identify the physical pin numbers on the Orange Pi 4A using the Orange Pi Wiki, and show you how to control a connected LED on the 7th physical pin. This tutorial also opens the door to various possibilities, such as controlling relay boards or other industrial equipment using the Orange Pi GPIO interface. Unlock the potential of your Orange Pi 4A and explore endless ways to interact with the external world.

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