// Potensiometer -> OLED display
#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 4 // Reset pin # (or -1 if sharing reset pin)
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

void setup()
{
  Serial.begin(9600);
  if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) // I2C address = 0x3C
  {
    Serial.println("SSD1306 allocation failed");
    while(1); //Don't proceed, loop forever
  }
 
 display.clearDisplay();
 display.setTextColor(WHITE);
 display.setTextSize(4);
 display.setCursor(0, 10);
 display.print("OLED");
 display.display();
 delay(2000);
 
 display.clearDisplay();
 display.setTextSize(2);
 display.setCursor(5, 0);
 display.println("pot value:");
 display.setCursor(5, 30);
 display.println("analog ip:"); }

void loop() {
 display.clearDisplay();
 int sensorValue = analogRead(A0);
 Serial.print("Analog Value =");
 Serial.println(sensorValue);
 float voltage = (sensorValue / 1023.0) * 5.0;
 Serial.print("Voltage =");
 Serial.print(voltage);
 Serial.println(" V");
 display.setCursor(5,15);
 display.print(sensorValue);
 display.setCursor(5,45);
 display.print(voltage);
 display.display();
 delay(1000);
 }