Because it had a built-in driver which would save me from all the hassle with shift registers it looked like a perfect fit. Luckily, a 4 digit display lain around on my desk. In one of my Arduino projects I needed to show some numbers.Total sales of around 10 million sets worldwide. National High-Tech Enterprise and a listed company in China. LTECH is the front-runner of LED control field with 15 years R&D and production experience.Here is our micro sd module Here is the layout Layout Code This example seems to get instal… In this example we connect an SD card to our ESP32, we will log analog readings to a file on the SD card.This year I am adding some holiday lighting items to the yard for a Christmas lighting show. I have been using them over the last year, and they are running great. So over a year ago, I installed WS2812B lights on my house for permanent lighting.