ESP32 Servo Motor with Arduino IDE

Introduction

Servo motors are precise actuators that rotate to a specific angle between 0° and 180°.
Using the ESP32’s PWM (Pulse Width Modulation) capabilities, you can control servo position easily.
This is useful for robotics, camera gimbals, and automation systems.

Required Components

• ESP32 Dev Board
• Servo Motor
• Jumper wires
• Breadboard
• 5V Power Supply, Battery

Pinout

Circuit Diagram / Wiring

• SERVO (5V) → ESP32 VIN an external 5V power supply
• SERVO (GND) → ESP32 GND
• SERVO (Signal) → ESP32 GPIO 13

Code / Programming

#include <Servo.h>

Servo myServo;

void setup() {
  myServo.attach(13); // Attach servo to GPIO 13
}

void loop() {
  myServo.write(0);    // Rotate to 0°
  delay(1000);
  myServo.write(90);   // Rotate to 90°
  delay(1000);
  myServo.write(180);  // Rotate to 180°
  delay(1000);
}

Explanation

• Servo.h library simplifies PWM control of servos.
• attach(13) links the servo signal to GPIO 13.
• write(angle) rotates the servo to the desired position.

Testing & Troubleshooting

• If the servo jitters or doesn’t move, check power supply stability.
• Make sure the GPIO pin used supports PWM (most ESP32 GPIOs do).
• Always connect the GND of the servo and ESP32 together.