Arduino (IoT): Simple Tutorial de IR Receptor/Transmisor (Parte 3)

 

En la Parte 1 & 2 vimos como usar receptor y LED IR para leer controles y controlar LEDs de color. Ahora veremos como enviar nuestros propios códigos o señales IR desde un LED IR.  Es decir, en la primera parte solo usamos el receptor IR para recibir los códigos de un control remoto.  Ahora enviaremos esos códigos al dispositivo para controlarlo.

 

Conexiones

 

Nuestra conexión sera si:

Aseguremos de conectar la LED correctamente con su pata al pin tierra y larga al resistor.

 

Codigo

El codigo de nuestro ejemplo sera el IRrecord de la librería:
[code]

/* record.ino Example sketch for IRLib2
* Illustrate how to record a signal and then play it back.
*/
#include <IRLibDecodeBase.h> //We need both the coding and
#include <IRLibSendBase.h> // sending base classes
#include <IRLib_P01_NEC.h> //Lowest numbered protocol 1st
#include <IRLib_P02_Sony.h> // Include only protocols you want
#include <IRLib_P03_RC5.h>
#include <IRLib_P04_RC6.h>
#include <IRLib_P05_Panasonic_Old.h>
#include <IRLib_P07_NECx.h>
#include <IRLib_HashRaw.h> //We need this for IRsendRaw
#include <IRLibCombo.h> // After all protocols, include this
// All of the above automatically creates a universal decoder
// class called “IRdecode” and a universal sender class “IRsend”
// containing only the protocols you want.
// Now declare instances of the decoder and the sender.
IRdecode myDecoder;
IRsend mySender;

// Include a receiver either this or IRLibRecvPCI or IRLibRecvLoop
#include <IRLibRecv.h>
IRrecv myReceiver(2); //pin number for the receiver

// Storage for the recorded code
uint8_t codeProtocol; // The type of code
uint32_t codeValue; // The data bits if type is not raw
uint8_t codeBits; // The length of the code in bits

//These flags keep track of whether we received the first code
//and if we have have received a new different code from a previous one.
bool gotOne, gotNew;

void setup() {
gotOne=false; gotNew=false;
codeProtocol=UNKNOWN;
codeValue=0;
Serial.begin(9600);
delay(2000);while(!Serial);//delay for Leonardo
Serial.println(F(“Send a code from your remote and we will record it.”));
Serial.println(F(“Type any character and press enter. We will send the recorded code.”));
Serial.println(F(“Type ‘r’ special repeat sequence.”));
myReceiver.enableIRIn(); // Start the receiver
}

// Stores the code for later playback
void storeCode(void) {
gotNew=true; gotOne=true;
codeProtocol = myDecoder.protocolNum;
Serial.print(F(“Received “));
Serial.print(Pnames(codeProtocol));
if (codeProtocol==UNKNOWN) {
Serial.println(F(” saving raw data.”));
myDecoder.dumpResults();
codeValue = myDecoder.value;
}
else {
if (myDecoder.value == REPEAT_CODE) {
// Don’t record a NEC repeat value as that’s useless.
Serial.println(F(“repeat; ignoring.”));
} else {
codeValue = myDecoder.value;
codeBits = myDecoder.bits;
}
Serial.print(F(” Value:0x”));
Serial.println(codeValue, HEX);
}
}
void sendCode(void) {
if( !gotNew ) {//We’ve already sent this so handle toggle bits
if (codeProtocol == RC5) {
codeValue ^= 0x0800;
}
else if (codeProtocol == RC6) {
switch(codeBits) {
case 20: codeValue ^= 0x10000; break;
case 24: codeValue ^= 0x100000; break;
case 28: codeValue ^= 0x1000000; break;
case 32: codeValue ^= 0x8000; break;
}
}
}
gotNew=false;
if(codeProtocol== UNKNOWN) {
//The raw time values start in decodeBuffer[1] because
//the [0] entry is the gap between frames. The address
//is passed to the raw send routine.
codeValue=(uint32_t)&(recvGlobal.decodeBuffer[1]);
//This isn’t really number of bits. It’s the number of entries
//in the buffer.
codeBits=recvGlobal.decodeLength-1;
Serial.println(F(“Sent raw”));
}
mySender.send(codeProtocol,codeValue,codeBits);
if(codeProtocol==UNKNOWN) return;
Serial.print(F(“Sent “));
Serial.print(Pnames(codeProtocol));
Serial.print(F(” Value:0x”));
Serial.println(codeValue, HEX);
}

void loop() {
if (Serial.available()) {
uint8_t C= Serial.read();
if(C==’r’)codeValue=REPEAT_CODE;
if(gotOne) {
sendCode();
myReceiver.enableIRIn(); // Re-enable receiver
}
}
else if (myReceiver.getResults()) {
myDecoder.decode();
storeCode();
myReceiver.enableIRIn(); // Re-enable receiver
}
}
[/code]

Aqui lo que hacemos es que del Monitor Serial vemos que código da el botón de encender/apagar del control de la television.  Eso se imprime en la pantalla del monitor y simplemente lo copiamos y lo pegamos en el mismo monitor, arriba, para ENVIAR ese códigos a través de la LED IR.  Movemos el proyecto cerca del televisor y la LED IR ahora enviara ese código y controlara el televisor!