// This example lets the i/o board read an analog input
// value, and send it via the serial port. The value that
// it sends is coded as a single byte value.
// Also, bytes received on the serial port set one of the
// connected leds on, and the others low. For example, if
// a value 5 is received via the serial port, then led 5
// is set on.

void setup() { 
  Serial.begin(9600);             // start serial comm at 9600 bps
  
  for (int i=0; i<8; i++) {       // set digital pins 0-7 as outputs 
    pinMode(i, OUTPUT);  
  }
} 


void loop() { 
  int v = analogRead(0);          // read analog input pin 0
  Serial.print(v/4, BYTE);        // send it via serial port 

  if (Serial.available() > 0) {   // if serial data available
    int p = Serial.read();        // read value p off the serial port

    for (int i=0; i<8; i++) {
      if (i == p) {               // set pin p HIGH
        digitalWrite(i, HIGH);
      } else {
        digitalWrite(i, LOW);     // and all other pins LOW
      }
    }
  }
  
  delay(100);
}