Spark Servo.ino

Servo leftWheel;
Servo rightWheel;

int drive(String command);
int stop(String command);

void setup() { 
  leftWheel.attach(A0);
  rightWheel.attach(A1);
  Spark.function("drive", drive);
  Spark.function("stop", stop);
} 

int stop(String command) {
  leftWheel.detach();
  rightWheel.detach();
  leftWheel.attach(A0);
  rightWheel.attach(A1);
  return 1;
} 

int drive(String command) {
  if (command == "forward") {
    leftWheel.write(180);
    rightWheel.write(0);
    return 1;
  }
  
  if (command == "back") {
    leftWheel.write(0);
    rightWheel.write(180);   
    return 1;
  }

  if (command == "left") {
    leftWheel.write(45);
    rightWheel.write(45); 
    return 1;
  }

  if (command == "right") {
    leftWheel.write(135);
    rightWheel.write(135);  
    return 1;
  }
  
  return -1;
} 
 
void loop() { 
}