Arduino program that receives an 8-byte command to be received by a Panasonic TV over infrared.

panasonicTvControl.c

#include <IRremote.h>

IRsend irsend;

void setup() {
  pinMode(3, OUTPUT);
  pinMode(13, OUTPUT);
  Serial.begin(9600);
}
void loop() {
   while (Serial.available() > 7) {
       union u_tag {
        byte b[8];
        unsigned long long ulval; 
       } u;
       u.b[0] = Serial.read();
       u.b[1] = Serial.read();
       u.b[2] = Serial.read();
       u.b[3] = Serial.read();
       u.b[4] = Serial.read();
       u.b[5] = Serial.read();
       u.b[6] = Serial.read();
       u.b[7] = Serial.read();

       irsend.sendPanasonic(u.ulval, 48);
      delay(1000);
      Serial.flush();
   }
   delay(2000);
}