ESP32-S3 Momentary Push Button with Arduino IDE

Introduction

The Momentary Tactile Push Button Module is a simple and essential input device used to trigger actions when pressed.
This version includes a built-in pull-down resistor, allowing easy and direct connection to the ESP32-S3.
In this tutorial, you’ll learn how to connect the push button to an ESP32-S3 and read its state using digital input.

Required Components

• ESP32-S3 Board
• Momentary Tactile Push Button Module
• Jumper wires
• Breadboard (optional, for easier connections)

Pinout

Circuit Diagram / Wiring

• Push Button VCC → VIN/5V, 3.3V (ESP32-S3)
• Push Button GND → GND (ESP32-S3)
• Push Button SIGNAL → Pin 4 (ESP32-S3)

Code / Programming

/*
Filename:     Basic_Button_Press.ino
Description:  Reads a push button with stable debounce on ESP32-S3
Author:       www.oceanlabz.in
Modification: 1/4/2025
*/
 
// Use a safe GPIO pin on ESP32-S3 (avoid 0, 1, 3, etc.)
// Example: GPIO 18
#define BUTTON_MODULE_PIN 4  // Momentary Tactile Push Button Module
 
void setup() {
  pinMode(BUTTON_MODULE_PIN, INPUT_PULLUP); // Use internal pull-up resistor
  Serial.begin(115200);                      // Start Serial Monitor at 115200 baud
}
 
void loop() {
  // Read the state of the push button
  int moduleState = digitalRead(BUTTON_MODULE_PIN);
 
  // Check if the button is pressed
  if (moduleState == LOW) {
    Serial.println("Module Button Pressed!");
  }
 
  delay(100); // Small delay for debounce
}

Explanation

• This code reads input from a momentary push button connected to ESP32-S3 using GPIO4.
• It uses internal pull-up to keep the pin HIGH until the button is pressed (goes LOW).
• When the button is pressed, “Module Button Pressed!” is printed in the Serial Monitor.

Troubleshooting

• Ensure the button is connected properly between the GPIO pin and GND.
• Double-check that GPIO 4 is not used by other hardware or restricted by the board.
• If no output appears, verify the baud rate (115200) in the Serial Monitor matches the code.