/* **************************************** *
  * Title                                    *
  * **************************************** *
  * (C) 201x-xx-xx Paolo Iocco               *
  * rev. 0.x                                 *
  * **************************************** *
  * Circuit diagram
  * ---------------
  *					 +-------+
  *					 | ooooo |
  *       D1--TX<----|   A   |<---------RAW
  *       D0--RX---->|   r   |<---------GND
  *       RST------->|   d   |<---------RST
  *       GND------->|   u   |<---------VCC
  *       D2-------->|   i   |-----A3---D17
  *       D3----#--->|   n   |-----A2---D16
  *       D4-------->|   o   |-----A1---D15
  *       D5<---#----|       |-----A0---D14
  *       D6<---#----|   m   |-----SCK--D13
  *       D7---------|   i   |-----MISO-D12
  *       D8---------|   n   |--#--MOSI-D11
  *       D9----#----|   i   |--#--SS---D10
  *					 +-------+
  *
  * ***************************************** */


//int motorPin = 3;
int pwm1 = 9;
int pwm2 = 10;
int pwm3 = 6;
int pwm4 = 5;
int led = 13;

void setup()
{
  pinMode(pwm1, OUTPUT);
  pinMode(pwm2, OUTPUT);
  pinMode(pwm3, OUTPUT);
  pinMode(pwm4, OUTPUT);
  pinMode(led, OUTPUT);
  Serial.begin(9600);
  while (!Serial);
  Serial.println("Speed 0 to 255");
}


void loop()
{
  if (Serial.available())
  {
    int speed = Serial.parseInt();
    if (speed >= 0 && speed <= 255)
    {
      Serial.println(speed);
      analogWrite(pwm1, speed);
      analogWrite(pwm2, speed);
      analogWrite(pwm3, speed);
      analogWrite(pwm4, speed);
    }
  }
  digitalWrite(led, HIGH);   // turn the LED on (HIGH is the voltage level)
  delay(900);              // wait for a second
  digitalWrite(led, LOW);    // turn the LED off by making the voltage LOW
  delay(100);
}