V6

#include <Servo.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>



LiquidCrystal_I2C lcd(0x27,20,4);
Servo esc;

char Str1[19];
char Str2[21];
char Str3[17];
char Str4[19];


void setup() {

esc.attach(9);
}

void loop() {


  sprintf(Str1, "Vitesse = %3d km/h", vitesse());
   lcd.setCursor(0,0);
   lcd.print(Str1);

  sprintf(Str2, "UBat = %.2f V/ %3d %", volt()/10,map(volt(),210,294,0,100));
    lcd.setCursor(0,1);
    lcd.print(Str2);

  sprintf(Str3, "Throttle : %3d %", PWM);
    lcd.setCursor(0,2);
    lcd.print(Str3);

  sprintf(Str4, "Autonomie %.2f km", autonomie());
    lcd.setCursor(0,3);
    lcd.print(Str4);
}

float volt()
{
  float R1 = 997000.0;                                       // valeur resistance
  float R2 = 98500.0;
  float vout = 0.0;
  float vin = 0.0;

     float value = analogRead(A0);

     vout = (value * 5.0) / 1024.0;
     vin = vout / (R2/(R1+R2));
     vin = vin * 10;
     vin = map(vin, 210, 294 , 0, 100);
     vin = constrain(vin,0,100);
        return vin;
}
float PWM()
{
  float PWM = analogRead(A1);

    PWM = map(PWM, 0, 1024, 0, 179);
    esc.write(PWM);
    int PWMA = map(PWM,0 ,179,0 ,100);
    return (PWMA);
}
int vitesse()
{
  vitesse;
  return vitesse;
  }
float autonomie()
{
  autonomie=  (volt()*ampere);
  }

  /*
   * https://liudr.wordpress.com/2012/01/16/sprintf/
   * https://arduino.stackexchange.com/questions/19234/print-string-and-integer-lcd
  */