ESP32 - Oled Buttons Status

#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels

#define OLED_RESET     -1 // Reset pin # (or -1 if sharing Arduino reset pin)
#define SCREEN_ADDRESS 0x3C //See datasheet for Address; 0x3D for 128x64, 0x3C for 128x32
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

#define button1  15
#define button2  2
#define button3  4

int b1,b2,b3;     // variables to store


void setup() {
  Serial.begin(9600);

  pinMode(button1,INPUT_PULLUP);
  pinMode(button2,INPUT_PULLUP);
  pinMode(button3,INPUT_PULLUP);

  // SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally
  if(!display.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDRESS)) {
    Serial.println(F("SSD1306 allocation failed"));
    for(;;); // Don't proceed, loop forever
  }

  // Show initial display buffer contents on the screen --
  // the library initializes this with an Adafruit splash screen.
  display.display();
  delay(2000); // Pause for 2 seconds

  display.clearDisplay();                 // clear display
  display.setTextSize(1);                 // set text size
  display.setTextColor(WHITE, BLACK);     // set text color
  
}

void loop() {
  
  if(digitalRead(button1) == HIGH){
    display.setCursor(5, 5);                     // set position to display
    display.println("button1 status : ON ");    // set text
    display.display();                         // display on OLED

  }
  else{
    display.setCursor(5, 5);       
    display.println("button1 status : OFF"); 
    display.display();  
  }

  if(digitalRead(button2) == HIGH){
    display.setCursor(5, 30);       
    display.println("button2 status : ON "); 
    display.display();  
  }
  else{
    display.setCursor(5, 30);       
    display.println("button2 status : OFF"); 
    display.display();  
  }

  if(digitalRead(button3) == HIGH){
    display.setCursor(5, 55);       
    display.println("button3 status : ON ");
    display.display();  
  }
  else{
    display.setCursor(5, 55);      
    display.println("button3 status : OFF"); 
    display.display();
  }

}        

Quick Steps

• power up your board
• Open Arduino IDE
• Select the right board
• Select the right port
• Copy the above code and open with Arduino IDE
• Click Upload button on Arduino IDE to upload code to ESP32

• Press and keep pressing the button several seconds
• See the changes you made