ESP32 - Button - Servo Motor

This tutorial instructs you how to use ESP32 with button and servo motor. In detail, we will learn how to do:

That process is repeated.

Hardware Used In This Tutorial

1×ESP-WROOM-32 Dev Module
1×Micro USB Cable
1×Servo Motor
1×Jumper Wires
1×(Optional) 5V Power Adapter
1×(Optional) DC Power Jack
1×(Optional) ESP32 Screw Terminal Adapter

One of the following breadboard:

1×Full-sized 830-Point Breadboard
1×Half-sized 400-point Breadboard
1×Mini-sized 170-point Breadboard
1×All-sized Breadboard Kit
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Introduction to Servo Motor and Button

We have specific tutorials about servo motor and button. Each tutorial contains detailed information and step-by-step instructions about hardware pinout, working principle, wiring connection to ESP32, ESP32 code... Learn more about them at the following links:

Wiring Diagram

ESP32 Button Servo Motor Wiring Diagram

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ESP32 Code - Button Controls Servo Motor

Why need to debounce for the button? ⇒ see ESP32 - Button Debounce tutorial

/* * This ESP32 code is created by * * This ESP32 code is released in the public domain * * For more detail (instruction and wiring diagram), visit */ #include <Servo.h> #include <ezButton.h> #define BUTTON_PIN 21 // ESP32 pin GIOP21 connected to button's pin #define SERVO_PIN 26 // ESP32 pin GIOP26 connected to servo motor's pin ezButton button(BUTTON_PIN); // create ezButton object that attach to pin 7; Servo servo; // create servo object to control a servo // variables will change: int angle = 0; // the current angle of servo motor void setup() { Serial.begin(9600); // initialize serial button.setDebounceTime(50); // set debounce time to 50 milliseconds servo.attach(SERVO_PIN); // attaches the servo on pin 9 to the servo object servo.write(angle); } void loop() { button.loop(); // MUST call the loop() function first if (button.isPressed()) { // change angle of servo motor if (angle == 0) angle = 90; else if (angle == 90) angle = 0; // control servo motor arccoding to the angle Serial.print("The button is pressed => rotate servo to "); Serial.print(angle); Serial.println("°"); servo.write(angle); } }

Quick Instructions

ESP32 add library
  • Type ESP32Servo on the search box, then look for the keypad library by Mark Stanley, Alexander Brevig
  • Click Install button to install servo motor library for ESP32.
ESP32 servo motor library
  • Copy the above code and paste it to Arduino IDE.
  • Compile and upload code to ESP32 board by clicking Upload button on Arduino IDE
  • Press the button several times
  • See the servo motor's rotation

Video Tutorial

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