#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define OLED_RESET     -1
#define SCREEN_ADDRESS 0x3C
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

#define T A6
#define E 5
int V;
float C;


void setup() {
  pinMode(T, INPUT);
  pinMode(E, OUTPUT);
  if (!display.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDRESS)) {
    Serial.println(F("SSD1306 allocation failed"));
    for (;;);
  }
  Serial.begin(9600);
}

void loop() {
  V = map(analogRead(T), 0, 1023, 0, 255);
  analogWrite(E, V);
  C = map(V, 0, 255, 0, 500);
  C = C / 100;
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(0, 0);
  display.print("valeur =");
  display.println(analogRead(T));
  decimalTobinary(analogRead(T));
  display.print("tension =");
  display.print(C);
  display.display();
  delay(200);

}

void decimalTobinary(int decimal) {
  String binary = "";
  for (int i = 0; i < 10; i++) {
    int tmp = decimal % 2;
    if (tmp == 1) {
      binary = "1" + binary;
    } else {
      binary = "0" + binary;
    }
    decimal = floor(decimal / 2);
  }
  Serial.println(binary);
}