ESP32-C3 Rainbow LED Strip

This is an example of how to use the Espressif ESP32-C3-DevKitM-1 to drive a WS2812B-64 Led Strip. The WS2812 is a digital RGB LED which integrates a driver circuit and a single control wire. This example will illustrate how to drive an WS2812B-64 LED strip but can be easily adopted to drive a led strip of a different size.

How to Use Example

Hardware Required:

* A development board with an ESP32 SoC, in this case we are using the new ESP32-C3DevKitM1
* A USB cable for Power supply and programming
* A WS2812 LED strip

Connection :

                             --- 5V
GPIO2 +-----------------+---|>| (WS2812B-64)
                        DI    +
                             --- GND

Configure your computer:

This presumes some version of Linux or MacOS with dev tools installed and a python version 3.8 (as of now 3.9 will not work). Details can be found [here](

ESP-IDF Setup:

mkdir -p ~/esp
cd ~/esp
git clone --recursive
cd ~/esp/esp-idf
. $HOME/esp/esp-idf/

Demo Setup:

cd ~/esp
git clone

Open the project configuration menu (` menuconfig`). 

In the `Example Connection Configuration` menu:

* Set the GPIO number used for transmitting the IR signal under `RMT TX GPIO` optin. (Default is 2)
* Set the number of LEDs in a strip under `Number of LEDS in a strip` option. (Default is 64)

Build and Flash:

Run ` set-target esp32c3` to set the target for compilation to the ESP32-C3
Run ` flash monitor` to build, flash and monitor the project.

To exit the serial monitor, type ``Ctrl-]``.

Hardware Setup:

Connect the `Input` signal of WS2812B-64 LED strip to the GPIO you set in menuconfig and connect power to the Led Strip.

When you run the example, you will see a rainbow effect. To change the speed, you can update the `EXAMPLE_CHASE_SPEED_MS` value in `led_strip_main.c` file.