I will start off with what I am trying to do.. I thought it would be simple, but I was soooo wrong. I have an IR remote I'm not using, and I want to use it for my Arduino to turn LEDs on and off. I have used scripts to grab the inputs of HEX and raw code for each button. When I try to turn around and use that code to execute commands, it does not work. Serial shows its seeing the input, but it wont do anything.
IR collector: 276-640 Infrared collector
IR REmote: Sony RMT-B101A
The hardware is all set up and works great, but the code is what I'm missing.
When I push the vol+ button on the remote, it sends back 90 though serial, when I push vol-, it sends back 890. When I try to put that into the logic of the code to turn on an LED, it never works. I erased everything and was wondering if anyone had any thoughts on this.
I already tried the following links:
http://arduino.cc/playground/Main/InterfacingWithHardware
I appreciate ANY advice you have or any code I should try. My goal is to simply flash a few pins depending on the button i press. I was wondering if anyone knew about some simple code I can use to decode my remote and use it. Keep in mind, I am quite new to this, and the code I am using, I did not write.
Thanks in advance!
This is the code i am using to decode the remote. There are what looks to be HEX values in the cases at the bottom, but i cant get it to react based on the button I push.
/*
* IRhashdecode - decode an arbitrary IR code.
* Instead of decoding using a standard encoding scheme
* (e.g. Sony, NEC, RC5), the code is hashed to a 32-bit value.
*
* An IR detector/demodulator must be connected to the input RECV_PIN.
* This uses the IRremote library: http://arcfn.com/2009/08/multi-protocol-infrared-remote-library.html
*
* The algorithm: look at the sequence of MARK signals, and see if each one
* is shorter (0), the same length (1), or longer (2) than the previous.
* Do the same with the SPACE signals. Hszh the resulting sequence of 0's,
* 1's, and 2's to a 32-bit value. This will give a unique value for each
* different code (probably), for most code systems.
*
* You're better off using real decoding than this technique, but this is
* useful if you don't have a decoding algorithm.
*
* Copyright 2010 Ken Shirriff
* http://arcfn.com
*/
#include <IRremote.h>
int RECV_PIN = 11;
IRrecv irrecv(RECV_PIN);
decode_results results;
void setup()
{
irrecv.enableIRIn(); // Start the receiver
Serial.begin(9600);
}
// Compare two tick values, returning 0 if newval is shorter,
// 1 if newval is equal, and 2 if newval is longer
// Use a tolerance of 20%
int compare(unsigned int oldval, unsigned int newval) {
if (newval < oldval * .8) {
return 0;
}
else if (oldval < newval * .8) {
return 2;
}
else {
return 1;
}
}
// Use FNV hash algorithm: http://isthe.com/chongo/tech/comp/fnv/#FNV-param
#define FNV_PRIME_32 16777619
#define FNV_BASIS_32 2166136261
/* Converts the raw code values into a 32-bit hash code.
* Hopefully this code is unique for each button.
*/
unsigned long decodeHash(decode_results *results) {
unsigned long hash = FNV_BASIS_32;
for (int i = 1; i+2 < results->rawlen; i++) {
int value = compare(results->rawbuf[i], results->rawbuf[i+2]);
// Add value into the hash
hash = (hash * FNV_PRIME_32) ^ value;
}
return hash;
}
void loop() {
if (irrecv.decode(&results)) {
Serial.print("'real' decode: ");
Serial.print(results.value, HEX);
Serial.print(", hash decode: ");
Serial.println(decodeHash(&results), HEX); // Do something interesting with this value
irrecv.resume(); // Resume decoding (necessary!)
}
}
#define LEDPIN 13
void blink() {
digitalWrite(LEDPIN, HIGH);
delay(200);
digitalWrite(LEDPIN, LOW);
delay(200);
}
// Blink the LED the number of times indicated by the Philips remote control
// Replace loop() with this for the blinking LED example.
void blink_example_loop() {
if (irrecv.decode(&results)) {
unsigned long hash = decodeHash(&results);
switch (hash) {
case 0x322ddc47: // 0 (10)
blink(); // fallthrough
case 0xdb78c103: // 9
blink();
case 0xab57dd3b: // 8
blink();
case 0x715cc13f: // 7
blink();
case 0xdc685a5f: // 6
blink();
case 0x85b33f1b: // 5
blink();
case 0x4ff51b3f: // 4
blink();
case 0x15f9ff43: // 3
blink();
case 0x2e81ea9b: // 2
blink();
case 0x260a8662: // 1
blink();
break;
default:
Serial.print("Unknown ");
Serial.println(hash, HEX);
}
irrecv.resume(); // Resume decoding (necessary!)
}
}
