#include <IRremote.h>

IRsend irsend;

int char1;
int got_char1;


void setup()
{
    got_char1 = 0;

    Serial.begin(9600);
}

void loop()
{
    char c = Serial.read();

    if (c == -1 || c < '0' || c > 'f')
        return;

    if (got_char1)
    {
        /* decode the two hex chars */
        long v;

        if (char1 > '9')
            v = (char1 - 'a' + 10) << 4;
        else
            v = (char1 - '0') << 4;
        if (c > '9')
            v |= c - 'a' + 10;
        else
            v |= c - '0';

        v = 0x20df0000 | (v << 8) | ((~v) & 0xff);
        Serial.print("\n\rSending: 0x");
        Serial.print(v, HEX);
        Serial.print("\n\r");

        irsend.sendNEC(v, 32);

        got_char1 = 0;
    }
    else
    {
        char1 = c;
        got_char1 = 1;
    }
}