Experimental support for Panasonic A/C messages. (#535)

* Experimental support for Panasonic A/C messages.
* sendPanasonicAC(), decodePanasonicAC(), & IRPanasonicAc class added.
* Unit tests for those.
* Code HEAVILY influenced by the work done at:
  https://github.com/ToniA/ESPEasy/blob/HeatpumpIR/lib/HeatpumpIR/PanasonicHeatpumpIR.cpp
* Should support LKE/DKE/JKE/NKE series units.
* Updated example code as required.
* Panasonic AC: Improve model detect and Fan mode.
* Panasonic has a Fan mode that requires the temp to be 27C.
* Some code lint improvements.
* Detail models supported etc.
* Make the class remember the set temp, so Fan mode doesn't overwrite it.
* Adjust unit tests to cover that.
* Update unit test Makefile to include protocol header files for dependencies.

Ref: #525 (comment)

* Update sendPanasonicAC() status to confirmed.

examples/IRMQTTServer/IRMQTTServer.ino

@@ -507,6 +507,9 @@ bool parseStringAndSendAirCon(const uint16_t irType, const String str) {
     case MITSUBISHI_AC:
       stateSize = kMitsubishiACStateLength;
       break;
+    case PANASONIC_AC:
+      stateSize = kPanasonicAcStateLength;
+      break;
     case TROTEC:
       stateSize = kTrotecStateLength;
       break;
@@ -657,6 +660,11 @@ bool parseStringAndSendAirCon(const uint16_t irType, const String str) {
     case ELECTRA_AC:
       irsend.sendElectraAC(reinterpret_cast<uint8_t *>(state));
       break;
+#endif
+#if SEND_PANASONIC_AC
+    case PANASONIC_AC:
+      irsend.sendPanasonicAC(reinterpret_cast<uint8_t *>(state));
+      break;
 #endif
     default:
       debug("Unexpected AirCon type in send request. Not sent.");
@@ -1216,6 +1224,7 @@ bool sendIRCode(int const ir_type, uint64_t const code, char const * code_str,
     case WHIRLPOOL_AC:  // 45
     case SAMSUNG_AC:  // 46
     case ELECTRA_AC:  // 48
+    case PANASONIC_AC:  // 49
       success = parseStringAndSendAirCon(ir_type, code_str);
       break;
 #if SEND_DENON

examples/IRrecvDumpV2/IRrecvDumpV2.ino

@@ -34,6 +34,7 @@
 #include <ir_Kelvinator.h>
 #include <ir_Mitsubishi.h>
 #include <ir_Midea.h>
+#include <ir_Panasonic.h>
 #include <ir_Samsung.h>
 #include <ir_Toshiba.h>
 
@@ -190,6 +191,13 @@ void dumpACInfo(decode_results *results) {
     description = ac.toString();
   }
 #endif  // DECODE_COOLIX
+#if DECODE_PANASONIC_AC
+  if (results->decode_type == PANASONIC_AC) {
+    IRPanasonicAc ac(0);
+    ac.setRaw(results->state);
+    description = ac.toString();
+  }
+#endif  // DECODE_PANASONIC_AC
   // If we got a human-readable description of the message, display it.
   if (description != "")  Serial.println("Mesg Desc.: " + description);
 }

src/IRrecv.cpp

@@ -508,6 +508,11 @@ bool IRrecv::decode(decode_results *results, irparams_t *save) {
   if (decodeElectraAC(results))
     return true;
 #endif
+#if DECODE_PANASONIC_AC
+  DPRINTLN("Attempting Panasonic AC decode");
+  if (decodePanasonicAC(results))
+    return true;
+#endif
 #if DECODE_LUTRON
   DPRINTLN("Attempting Lutron decode");
   if (decodeLutron(results))

src/IRrecv.h

@@ -320,6 +320,10 @@ class IRrecv {
   bool decodeElectraAC(decode_results *results,
                        uint16_t nbits = kElectraAcBits, bool strict = true);
 #endif
+#if DECODE_PANASONIC_AC
+  bool decodePanasonicAC(decode_results *results,
+                         uint16_t nbits = kPanasonicAcBits, bool strict = true);
+#endif
 };
 
 #endif  // IRRECV_H_

src/IRremoteESP8266.h

@@ -190,11 +190,15 @@
 #define DECODE_ELECTRA_AC      true
 #define SEND_ELECTRA_AC        true
 
+#define DECODE_PANASONIC_AC    true
+#define SEND_PANASONIC_AC      true
+
 #if (DECODE_ARGO || DECODE_DAIKIN || DECODE_FUJITSU_AC || DECODE_GREE || \
      DECODE_KELVINATOR || DECODE_MITSUBISHI_AC || DECODE_TOSHIBA_AC || \
      DECODE_TROTEC || DECODE_HAIER_AC || DECODE_HITACHI_AC || \
      DECODE_HITACHI_AC1 || DECODE_HITACHI_AC2 || DECODE_HAIER_AC_YRW02 || \
-     DECODE_WHIRLPOOL_AC || DECODE_SAMSUNG_AC || DECODE_ELECTRA_AC)
+     DECODE_WHIRLPOOL_AC || DECODE_SAMSUNG_AC || DECODE_ELECTRA_AC || \
+     DECODE_PANASONIC_AC)
 #define DECODE_AC true  // We need some common infrastructure for decoding A/Cs.
 #else
 #define DECODE_AC false   // We don't need that infrastructure.
@@ -262,6 +266,7 @@ enum decode_type_t {
   SAMSUNG_AC,
   LUTRON,
   ELECTRA_AC,
+  PANASONIC_AC,
 };
 
 // Message lengths & required repeat values
@@ -325,6 +330,8 @@ const uint16_t kNikaiBits = 24;
 const uint16_t kNECBits = 32;
 const uint16_t kPanasonicBits = 48;
 const uint32_t kPanasonicManufacturer = 0x4004;
+const uint16_t kPanasonicAcStateLength = 27;
+const uint16_t kPanasonicAcBits = kPanasonicAcStateLength * 8;
 const uint16_t kProntoMinLength = 6;
 const uint16_t kRC5RawBits = 14;
 const uint16_t kRC5Bits = kRC5RawBits - 2;

src/IRsend.h

@@ -294,6 +294,11 @@ void send(uint16_t type, uint64_t data, uint16_t nbits);
                      uint16_t nbytes = kElectraAcStateLength,
                      uint16_t repeat = kNoRepeat);
 #endif
+#if SEND_PANASONIC_AC
+  void sendPanasonicAC(unsigned char data[],
+                       uint16_t nbytes = kPanasonicAcStateLength,
+                       uint16_t repeat = kNoRepeat);
+#endif
 
  protected:
 #ifdef UNIT_TEST

src/IRutils.cpp

@@ -131,6 +131,7 @@ std::string typeToString(const decode_type_t protocol,
     case NEC_LIKE:       result = "NEC (non-strict)";  break;
     case NIKAI:          result = "NIKAI";             break;
     case PANASONIC:      result = "PANASONIC";         break;
+    case PANASONIC_AC:   result = "PANASONIC_AC";      break;
     case PRONTO:         result = "PRONTO";            break;
     case RAW:            result = "RAW";               break;
     case RC5:            result = "RC5";               break;
@@ -167,6 +168,7 @@ bool hasACState(const decode_type_t protocol) {
     case HITACHI_AC2:
     case KELVINATOR:
     case MITSUBISHI_AC:
+    case PANASONIC_AC:
     case SAMSUNG_AC:
     case TOSHIBA_AC:
     case WHIRLPOOL_AC: