#ESP32 Call for Entries# ESP32 IoT RGB Light Base

Project Overview:
This project uses an ESP32C3 to control four WS2812 LEDs. The color and brightness of the LEDs can be controlled via a mobile app, making it suitable as an ambient light or night light.
Principle Analysis (Hardware Description):
This project mainly consists of a power supply circuit, an ESP32-C3 main controller, WS2812 RGB LEDs, a switch, and reserved interface circuitry. The project primarily uses the MCU to connect to Wi-Fi, receive and process data from the mobile phone, and control the WS2812 LEDs to emit light.
Power Supply Circuit:
A TYPE-C-16P interface is used as the power supply interface. The corresponding USB data pins are connected to the corresponding USB pins of the ESP32-C3 (USBDP-IO19) and (USBDN-IO18). USB is used directly for downloading and debugging without needing to convert to a serial signal. (If a CtoC connection is not required, the 5.1K pull-down resistors R6 and R7 for CC1 and CC2 can be omitted.) The RGB LED circuit
uses an AMS1117-3.3V LDO linear regulator IC to power the ESP32-C3 . Four WS2812 LEDs are arranged in the middle of the PCB board; different lighting effects can be achieved by changing the colors and brightness of the WS2812s. The casing was roughly drawn using EDA; my skills are limited, so it'll have to do. Originally , I wanted to use the remote control from DianDeng Technology, but DianDeng defaults to developing with the 8266, and compiling it on the ESP32-C3 with the Arduino IDE resulted in errors, which I couldn't resolve. Later, I flashed the open-source WLED firmware. After using it, I found WLED to be very powerful, with various ready-made firmware and modes, and it even supports multi-device synchronization within a local area network—it's incredibly useful. A common problem I encountered when flashing the firmware was that it wouldn't light up. I repeatedly compared settings and GPIO ports, and the DI pin connected to the WS2812 was always pulled low, even though the main controller was working correctly. After flashing the WLED firmware, my phone could find the WLED hotspot, connect to it via Wi-Fi, and successfully access the app to configure parameters. I bought a pre-made WS2812 LED strip from Taobao and tested it on other development boards; it lit up. But when I connected it to this board, it still didn't light up. Finally, I swapped the WS2812 on the Taobao strip with the one on the board. I discovered that the LED on the board didn't light up, but the Chengxingguang WS2812 on the Taobao strip actually lit up! I initially thought my WS2812 was faulty, but it turned out the board was the problem. After comparing, I found that the DIDO package of the Chengxingguang WS2812 was reversed. I then used a jumper wire to the IO10 of the reserved header on the board, changed the settings, and it lit up immediately. The actual product picture shows how beautiful the gold-plated board looks! The soldering process was like a human SMT iron plate , installing the casing and lighting it up... I took out a crystal ball, changed the color, and then just randomly changed the 'lampshade'— using whatever was available. I've been coughing too much this year! @@ Thank you everyone!