Here are our cars. It took long to get a result, especially communication between phone and car was tough. One team didn't succeed in presenting their car. One pupil is supposed to work on it at home during summer.

Based on Arduino and two motors and app coded in our school.

FormulaE.zip

(Unzip this file, save it in your Android smartphone and install it to get the application).

Based on Lego Mindstorm NXT and piloted with NXT Remote Control app.

Based on raspberry pi and two motors. Still under programming.

Based on Arduino, two motors, 4 wheels and app coded in our school.

FormulaE.zip

(Unzip this file, save it in your Android smartphone and install it to get the application).

Here is the Arduino code in this car :

FormulaEArduino.zip

/*
*  Bluetooth Arduino Car for Formula E
*  This program lets you control motors thanks to DFRobot arduino motor shield using a bluetooth module
*/
char Incoming_value = 0;                //Variable for storing Incoming_value
int dirA = 4;
int pwrA = 5;
int dirB = 7;
int pwrB = 6;

void setup()
{
  //Setup Motor A
  pinMode(dirA, OUTPUT); //Initiates Direction Motor  A pin
  pinMode(pwrA, OUTPUT); //Initiates Power Motor A pin

  //Setup Motor B
  pinMode(dirB, OUTPUT); //Initiates Direction Motor  B pin
  pinMode(pwrB, OUTPUT);  //Initiates Power Motor B pin
  Serial.begin(9600);         //Sets the data rate in bits per second (baud) for serial data transmission
}
void loop()
{
  if(Serial.available() > 0) 
  {
    Incoming_value = Serial.read();      //Read the incoming data and store it into variable Incoming_value
switch (Incoming_value) {
    case '0':    // STOP when 0 is received
      analogWrite(pwrA, 0);  // power to 0
      analogWrite(pwrB, 0);  // power to 0
      digitalWrite(dirA, LOW); // reverse direction
      digitalWrite(dirB, LOW); // reverse direction
      break;
    case '1':    // FORWARD when 1 is received
          analogWrite(pwrA, 255);  // power to maximum
      analogWrite(pwrB, 222);  // power to maximum (222 to get equal speeds for both motors)
      digitalWrite(dirA, HIGH);  // normal direction
      digitalWrite(dirB, HIGH);  // normal direction

      break;
    case '2':    // LEFT when 2 is received
     analogWrite(pwrA, 255);  // power to maximum
      analogWrite(pwrB, 222);  // power to maximum (222 to get equal speeds for both motors)
      digitalWrite(dirA, HIGH);  // normal direction
      digitalWrite(dirB, LOW); // reverse direction

      break;
    case '3':    // RIGHT when 3 is received
          analogWrite(pwrA, 255);  // power to maximum
      analogWrite(pwrB, 222);  // power to maximum (222 to get equal speeds for both motors)
      digitalWrite(dirA, LOW); // reverse direction
      digitalWrite(dirB, HIGH);  // normal direction

      break;
    case '4':    // BACKWARDS when 4 is received
          analogWrite(pwrA, 255);  // power to maximum
      analogWrite(pwrB, 222);  // power to maximum (222 to get equal speeds for both motors)
      digitalWrite(dirA, LOW); // reverse direction
      digitalWrite(dirB, LOW); // reverse direction

      break;
  }

  }                            

}