IR Transceiver for Arduino

IR_Transceiver_Arduino.ino

#include <IRremote.h>

const int ir_recv_pin = 8;
const int ir_send_pin = 3;

IRrecv irrecv(ir_recv_pin);
IRsend irsend(ir_send_pin);

decode_results results;

uint8_t rawCodes[RAW_BUFFER_LENGTH];
int frequency = 38; // frequency in kHz

/*
                             +-----+
+----[PWR]-------------------| USB |--+
|                            +-----+  |
|         GND/RST2  [ ][ ]            |
|       MOSI2/SCK2  [ ][ ]  A5/SCL[ ] |
|          5V/MISO2 [ ][ ]  A4/SDA[ ] |
|                             AREF[ ] |
|                              GND[ ] |
| [ ]N/C                    SCK/13[ ] |
| [ ]IOREF                 MISO/12[ ] |
| [ ]RST                   MOSI/11[ ]~|     IR Receiver
| [ ]3V3    +---+               10[ ]~|
| [ ]5v    -| A |-               9[ ]~|   +5V --|\
| [ ]GND   -| R |-               8[*]=|=======--| )
| [ ]GND   -| D |-                    |   GND --|/
| [ ]Vin   -| U |-               7[ ] |
|          -| I |-               6[ ]~|                
| [ ]A0    -| N |-               5[ ]~|     IR Diode   
| [ ]A1    -| O |-               4[ ] |
| [ ]A2     +---+           INT1/3[*]=|=======--|\
| [ ]A3                     INT0/2[ ] |   GND --|/
| [ ]A4/SDA  RST SCK MISO     TX>1[ ] |
| [ ]A5/SCL  [ ] [ ] [ ]      RX<0[ ] |
|            [ ] [ ] [ ]              |
|  UNO_R3    GND MOSI 5V  ____________/
 \_______________________/
*/

void setup()
{
  Serial.begin(9600);
  irrecv.enableIRIn();  // Start the receiver
  irrecv.blink13(true); // Enable feedback LED
}

void loop()
{
    if (Serial.available() > 0) {
      Serial.read();
      ir_send();
    }
    
    ir_recv();

    delay(10);
}

void ir_send()
{
  irrecv.stop();
  Serial.flush();
  irsend.sendRaw(rawCodes, RAW_BUFFER_LENGTH, frequency);
  irrecv.resume();
}

void ir_recv()
{
    if (irrecv.decode(&results)) {
        if (results.rawlen > 4) {
          irrecv.printIRResultRawFormatted(&Serial, true);
          irrecv.compensateAndStoreIRResultInArray(rawCodes);
        }
        irrecv.resume();
    }
}