(This schematic uses the ESP32 DEVKIT V1 module version with 30 GPIOs – if you’re using another model, please check the pinout for the board you’re using.) Wire an LED to your ESP32 as in the following schematic diagram. Let’s see a simple example to see how to use the ESP32 LED PWM controller using the Arduino IDE. This function accepts as arguments the channel that is generating the PWM signal, and the duty cycle. The first is the GPIO that will output the signal, and the second is the channel that will generate the signal.ĥ. Finally, to control the LED brightness using PWM, you use the following function: ledcWrite(channel, dutycycle) For that you’ll use the following function: ledcAttachPin(GPIO, channel) We’ll use 8-bit resolution, which means you can control the LED brightness using a value from 0 to 255.Ĥ. Next, you need to specify to which GPIO or GPIOs the signal will appear upon. For an LED, a frequency of 5000 Hz is fine to use.ģ. You also need to set the signal’s duty cycle resolution: you have resolutions from 1 to 16 bits. Then, you need to set the PWM signal frequency. Here’s the steps you’ll have to follow to dim an LED with PWM using the Arduino IDE:ġ. The ESP32 has a LED PWM controller with 16 independent channels that can be configured to generate PWM signals with different properties. You can use the preceding links or go directly to /tools to find all the parts for your projects at the best price! ESP32 DOIT DEVKIT V1 Board – read best ESP32 development boards.To follow this tutorial you need these parts:

This tutorial is available in video format (watch below) and in written format (continue reading).

ESP32 Pinout Reference: Which GPIO pins should you use?.

We also recommend taking a look at the following resources:

Installing the ESP32 Board in Arduino IDE (Mac and Linux instructions).Installing the ESP32 Board in Arduino IDE (Windows instructions).Follow one of the following tutorials to install the ESP32 on the Arduino IDE, if you haven’t already. Before proceeding with this tutorial you should have the ESP32 add-on installed in your Arduino IDE.

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