/*********
 Text size 1: "display.setTextSize(1);" gives 21 characters per line and 8 lines.
 Text size 2: "display.setTextSize(2);" gives 10 characters per line and 4 lines.
 Text size 3: "display.setTextSize(3);" gives 7 characters per line and 2.5 (2) lines.
 Text size 4: "display.setTextSize(4);" gives 5 characters per line and 2 lines.
 Text size 5: "display.setTextSize(5);" gives 4 characters per line and 1.75 (1) lines.
 Text size 6: "display.setTextSize(6);" gives 3 characters per line and 1.5 (1) lines.
 Text size 7: "display.setTextSize(7);" gives 3 characters per line and 1.25 (1) lines.
 Text size 8: "display.setTextSize(8);" gives 2 characters per line and 1 line.
 Text size 9: "display.setTextSize(9);" gives 2 characters per line and 1 line.
*********/

#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

// Declaration for an SSD1306 display connected to I2C (SDA, SCL pins)
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);

bool  Textsize;

void setup() {
  
  pinMode      (2, INPUT_PULLUP);


  pinMode(Textsize, INPUT); // Set the pin as input
  
  Serial.begin(115200);

  if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { // Address 0x3D for 128x64
    Serial.println(F("SSD1306 allocation failed"));
    for(;;);
  }
  delay(500);

}

void loop() {
 
 Textsize = (digitalRead(2) == LOW);

 if (Textsize == true)
 {
  display.clearDisplay();

  display.setTextSize(2);
  display.setTextColor(WHITE);
  display.setCursor(0, 00);
  // Display static text
  display.println("AAAAAAAAAAAAAAAAAAAAABBBBBBBBBBBBBBBBBBBBBCCCCCCCCCCCCCCCCCCCCCDDDDDDDDDDDDDDDDDDDDDEEEEEEEEEEEEEEEEEEEEEFFFFFFFFFFFFFFFFFFFFFGGGGGGGGGGGGGGGGGGGGGHHHHHHHHHHHHHHHHHHHHH");
  display.display(); 
 }

delay(100);

 if (Textsize == false)
 {
  display.clearDisplay();

  display.setTextSize(1);
  display.setTextColor(WHITE);
  display.setCursor(0, 00);
  // Display static text
  display.println("AAAAAAAAAAAAAAAAAAAAABBBBBBBBBBBBBBBBBBBBBCCCCCCCCCCCCCCCCCCCCCDDDDDDDDDDDDDDDDDDDDDEEEEEEEEEEEEEEEEEEEEEFFFFFFFFFFFFFFFFFFFFFGGGGGGGGGGGGGGGGGGGGGHHHHHHHHHHHHHHHHHHHHH");
  display.display(); 
 }

delay(100);





}