Updates for LG Air Conditioner Remote

Author: Darryl Smith

IRremote.cpp

@@ -14,6 +14,7 @@
  * Also influenced by http://zovirl.com/2008/11/12/building-a-universal-remote-with-an-arduino/
  *
  * JVC and Panasonic protocol added by Kristian Lauszus (Thanks to zenwheel and other people at the original blog post)
+ * LG added by Darryl Smith (based on the JVC protocol)
  */
 
 #include "IRremote.h"
@@ -459,6 +460,12 @@ int IRrecv::decode(decode_results *results) {
     if (decodePanasonic(results)) {
         return DECODED;
     }
+#ifdef DEBUG
+    Serial.println("Attempting LG decode");
+#endif 
+    if (decodeLG(results)) {
+        return DECODED;
+    }
 #ifdef DEBUG
     Serial.println("Attempting JVC decode");
 #endif 
@@ -876,6 +883,52 @@ long IRrecv::decodePanasonic(decode_results *results) {
     results->bits = PANASONIC_BITS;
     return DECODED;
 }
+
+long IRrecv::decodeLG(decode_results *results) {
+    long data = 0;
+    int offset = 1; // Skip first space
+  
+    // Initial mark
+    if (!MATCH_MARK(results->rawbuf[offset], LG_HDR_MARK)) {
+        return ERR;
+    }
+    offset++; 
+    if (irparams.rawlen < 2 * LG_BITS + 1 ) {
+        return ERR;
+    }
+    // Initial space 
+    if (!MATCH_SPACE(results->rawbuf[offset], LG_HDR_SPACE)) {
+        return ERR;
+    }
+    offset++;
+    for (int i = 0; i < LG_BITS; i++) {
+        if (!MATCH_MARK(results->rawbuf[offset], LG_BIT_MARK)) {
+            return ERR;
+        }
+        offset++;
+        if (MATCH_SPACE(results->rawbuf[offset], LG_ONE_SPACE)) {
+            data = (data << 1) | 1;
+        } 
+        else if (MATCH_SPACE(results->rawbuf[offset], LG_ZERO_SPACE)) {
+            data <<= 1;
+        } 
+        else {
+            return ERR;
+        }
+        offset++;
+    }
+    //Stop bit
+    if (!MATCH_MARK(results->rawbuf[offset], LG_BIT_MARK)){
+        return ERR;
+    }
+    // Success
+    results->bits = LG_BITS;
+    results->value = data;
+    results->decode_type = LG;
+    return DECODED;
+}
+
+
 long IRrecv::decodeJVC(decode_results *results) {
     long data = 0;
     int offset = 1; // Skip first space

IRremote.h

@@ -10,6 +10,7 @@
  * Also influenced by http://zovirl.com/2008/11/12/building-a-universal-remote-with-an-arduino/
  *
  * JVC and Panasonic protocol added by Kristian Lauszus (Thanks to zenwheel and other people at the original blog post)
+* LG added by Darryl Smith (based on the JVC protocol)
  */
 
 #ifndef IRremote_h
@@ -46,6 +47,7 @@ class decode_results {
 #define SANYO 9
 #define MITSUBISHI 10
 #define SAMSUNG 11
+#define LG 12
 #define UNKNOWN -1
 
 // Decoded value for NEC when a repeat code is received
@@ -70,6 +72,7 @@ class IRrecv
   long decodeRC5(decode_results *results);
   long decodeRC6(decode_results *results);
   long decodePanasonic(decode_results *results);
+  long decodeLG(decode_results *results);
   long decodeJVC(decode_results *results);
   long decodeSAMSUNG(decode_results *results);
   long decodeHash(decode_results *results);

IRremoteInt.h

@@ -159,6 +159,13 @@
 #define JVC_ZERO_SPACE 550
 #define JVC_RPT_LENGTH 60000
 
+#define LG_HDR_MARK 8000
+#define LG_HDR_SPACE 4000
+#define LG_BIT_MARK 600
+#define LG_ONE_SPACE 1600
+#define LG_ZERO_SPACE 550
+#define LG_RPT_LENGTH 60000
+
 #define SAMSUNG_HDR_MARK  5000
 #define SAMSUNG_HDR_SPACE 5000
 #define SAMSUNG_BIT_MARK  560

examples/IRrecvDump/IRrecvDump.ino

@@ -5,6 +5,7 @@
  * Copyright 2009 Ken Shirriff
  * http://arcfn.com
  * JVC and Panasonic protocol added by Kristian Lauszus (Thanks to zenwheel and other people at the original blog post)
+ * LG added by Darryl Smith (based on the JVC protocol)
  */
 
 #include <IRremote.h>
@@ -48,6 +49,9 @@ void dump(decode_results *results) {
     Serial.print(results->panasonicAddress,HEX);
     Serial.print(" Value: ");
   }
+  else if (results->decode_type == LG) {
+     Serial.print("Decoded LG: ");
+  }
   else if (results->decode_type == JVC) {
      Serial.print("Decoded JVC: ");
   }