Sample Project Usind Blink Example

This example demonstrates how to blink a LED using GPIO or RMT for the addressable LED, i.e. WS2812.

Hardware Required

A development board with ESP32/ESP32-S2/ESP32-S3/ESP32-C3 SoC (e.g., ESP32-DevKitC, ESP-WROVER-KIT, etc.)
A USB cable for Power supply and programming

Some development boards use an addressable LED instead of a regular one. These development boards include:

Board	LED type	Pin
ESP32-C3-DevKitC-1	Addressable	GPIO8
ESP32-C3-DevKitM-1	Addressable	GPIO8
ESP32-S2-DevKitM-1	Addressable	GPIO18
ESP32-S2-Saola-1	Addressable	GPIO18
ESP32-S3-DevKitC-1	Addressable	GPIO48

Configure the Project

Open the project configuration menu (idf.py menuconfig).

In the Example Configuration menu:

Select the LED type in the Blink LED type option.
- Use GPIO for regular LED blink.
- Use RMT for addressable LED blink.
  - Use RMT Channel to select the RMT peripheral channel.
Set the GPIO number used for the signal in the Blink GPIO number option.
Set the blinking period in the Blink period in ms option.

Build and Flash

Run idf.py -p PORT flash monitor to build, flash and monitor the project.

Example Output

As you run the example, you will see the LED blinking, according to the previously defined period. For the addressable LED, you can also change the LED color by setting the pStrip_a->set_pixel(pStrip_a, 0, 16, 16, 16); (LED Strip, Pixel Number, Red, Green, Blue) with values from 0 to 255 in the blink.c file.

The pixel number indicates the pixel position in the LED strip. For a single LED, use 0.

Troubleshooting

If the LED isn't blinking, check the GPIO or the LED type selection in the Example Configuration menu.