ESP32 - Rotary Encoder LED
In this tutorial, We are going to learn how to program ESP32 to control the brightness of a LED according to the rotary encoder's output value.
Hardware Used In This Tutorial
|ESP-WROOM-32 Dev Module
|USB Cable Type-C
|220 ohm resistor
|(Recommended) ESP32 Screw Terminal Adapter
Or you can buy the following sensor kit:
|DIYables Sensor Kit 30 types, 69 units
Introduction to LED and Rotary Encoder
Unfamiliar with LED and rotary encoder, including their pinouts, functionality, and programming? Explore comprehensive tutorials on these topics below:
This image is created using Fritzing. Click to enlarge image
If you're unfamiliar with how to supply power to the ESP32 and other components, you can find guidance in the following tutorial: How to Power ESP32.
- If this is the first time you use ESP32, see how to setup environment for ESP32 on Arduino IDE.
- Do the wiring as above image.
- Connect the ESP32 board to your PC via a micro USB cable
- Open Arduino IDE on your PC.
- Select the right ESP32 board (e.g. ESP32 Dev Module) and COM port.
- Connect ESP32 to PC via USB cable
- Open Arduino IDE, select the right board and port
- Copy the above code and open with Arduino IDE
- Click Upload button on Arduino IDE to upload code to ESP32
- Open Serial Monitor
- Rotate the rotary encoder
- See the LED's brightness
- See the result on Serial Monitor
Read the line-by-line explanation in comment lines of source code!
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