Learn how to create customizable magnetic LED lettering using an ESP32 and WLED in this comprehensive tutorial video. Explore the step-by-step process of building rearrangeable, magnetically connected letters for signs and decorations. Discover techniques for 3D printing LED letters, setting up a WLED controller, and assembling the letters with small magnets. Master the installation of LED strips, diffusers, and magnetic connectors. Gain insights into power injection methods and creating double-row lettering. Follow along as the video covers everything from initial setup to final testing and assembly, providing a complete guide to crafting your own illuminated, customizable signage.