/* Crawler Slave
 *  
 *  This code runs on the crawler i2c network
 *  and provides a cleaner, less CPU intensive control over PWM devices.
 */

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

// This servo is used to wipe and clean the camera lens
Servo windowWiperServo;

void setup() {
  // Attach the wiper servo to pin 9
  windowWiperServo.attach(9);

  // This is the address the pi will speak to us at
  Wire.begin(0x8);
  
  // Call receiveEvent when data received                
  Wire.onReceive(receiveEvent);
  
}

// Just loop to keep the running code alive, and wait for events to happen.
void loop() {
  delay(50);
}

// This method runs when we receive a message
void receiveEvent(int howMany) {
  while (Wire.available()) { // loop through all but the last
    int pos = Wire.read(); // receive byte as a int
    windowWiperServo.write(pos);
  }
}