/*
XBEE RSSI Reader
 a simple example of reading the address and RSSI information
 when receiving an I/O packet
 CAUTION: assumes a single digital sample only
 CAUTION: assumes a sender address between 0 and FF only
 
 by Rob Faludi www.faludi.com
 VERSION "1.00"
 */


int RSSI=0; // holds the Received Signal Strength Value
int address=0; // holds the 16-bit address of the sender

void setup() {
  Serial.begin(9600);  
}


void loop () {
  if (Serial.available() > 13) { // if we have received at least one frome worth of bytes
    int inByte = Serial.read(); // read in a byte
    if (inByte == 0x7E) { // if it is the start byte
      for (int i=0;i<4;i++) {
        int junk = Serial.read(); // read and discard the next four bytes because we are not using them here
      } 
      address = Serial.read(); // the sixth byte is the low part of the address
      RSSI = Serial.read(); // the seventh byte is the RSSI value
      for (int i=0;i<6;i++) { 
        int junk = Serial.read(); // read and discard the following six bytes because we are not using them
      }

    }
  }

/////////// SIMPLE USE OF THE INCOMING VALUE ////////////////
  if (address == 1) { 
    analogWrite(10,(100-RSSI)*2); // analog write a brightness roughly corresponding to distance
  }
  else if (address == 2){
       analogWrite(11,(100-RSSI)*2); // analog write a brightness roughly corresponding to distance
  }
}