arduino-heatpumpir/PanasonicHeatpumpIR.cpp

#include <Arduino.h>
#include "PanasonicHeatpumpIR.h"

// This is a protected method, i.e. generic Panasonic instances cannot be created
PanasonicHeatpumpIR::PanasonicHeatpumpIR()
{
}

// The different models just set the model accordingly
PanasonicDKEHeatpumpIR::PanasonicDKEHeatpumpIR()
{
  _panasonicModel = PANASONIC_DKE;
}

PanasonicNKEHeatpumpIR::PanasonicNKEHeatpumpIR()
{
  _panasonicModel = PANASONIC_NKE;
}

PanasonicJKEHeatpumpIR::PanasonicJKEHeatpumpIR()
{
  _panasonicModel = PANASONIC_JKE;
}

// Panasonic DKE/NKE/JKE numeric values to command bytes
void PanasonicHeatpumpIR::send(IRSender& IR, byte powerModeCmd, byte operatingModeCmd, byte fanSpeedCmd, byte temperatureCmd, byte swingVCmd, byte swingHCmd)
{
  // Sensible defaults for the heat pump mode

  byte operatingMode = PANASONIC_AIRCON2_TIMER_CNL;
  byte fanSpeed      = PANASONIC_AIRCON2_FAN_AUTO;
  byte temperature   = 23;
  byte swingV        = PANASONIC_AIRCON2_VS_UP;
  byte swingH        = PANASONIC_AIRCON2_HS_AUTO;

  switch (powerModeCmd)
  {
    case POWER_ON:
      operatingMode |= PANASONIC_AIRCON2_MODE_ON;
      break;
  }

  switch (operatingModeCmd)
  {
    case MODE_AUTO:
      operatingMode |= PANASONIC_AIRCON2_MODE_AUTO;
      break;
    case MODE_HEAT:
      operatingMode |= PANASONIC_AIRCON2_MODE_HEAT;
      break;
    case MODE_COOL:
      operatingMode |= PANASONIC_AIRCON2_MODE_COOL;
      break;
    case MODE_DRY:
      operatingMode |= PANASONIC_AIRCON2_MODE_DRY;
      break;
    case MODE_FAN:
      operatingMode |= PANASONIC_AIRCON2_MODE_FAN;
      temperatureCmd = 27; // Temperature is always 27 in FAN mode
      break;
    case MODE_MAINT: // Maintenance mode is just the heat mode at +8 or +10, FAN5
      operatingMode |= PANASONIC_AIRCON2_MODE_HEAT;
	  temperature = 10; // Default to +10 degrees
	  fanSpeedCmd = FAN_5;
      break;
  }

  switch (fanSpeedCmd)
  {
    case FAN_AUTO:
      fanSpeed = PANASONIC_AIRCON2_FAN_AUTO;
      break;
    case FAN_1:
      fanSpeed = PANASONIC_AIRCON2_FAN1;
      break;
    case FAN_2:
      fanSpeed = PANASONIC_AIRCON2_FAN2;
      break;
    case FAN_3:
      fanSpeed = PANASONIC_AIRCON2_FAN3;
      break;
    case FAN_4:
      fanSpeed = PANASONIC_AIRCON2_FAN4;
      break;
    case FAN_5:
      fanSpeed = PANASONIC_AIRCON2_FAN5;
      break;
  }

  if ( temperatureCmd > 15 && temperatureCmd < 31)
  {
    temperature = temperatureCmd;
  }

  switch (swingVCmd)
  {
    case VDIR_AUTO:
    case VDIR_SWING:
      swingV = PANASONIC_AIRCON2_VS_AUTO;
      break;
    case VDIR_UP:
      swingV = PANASONIC_AIRCON2_VS_UP;
      break;
    case VDIR_MUP:
      swingV = PANASONIC_AIRCON2_VS_MUP;
      break;
    case VDIR_MIDDLE:
      swingV = PANASONIC_AIRCON2_VS_MIDDLE;
      break;
    case VDIR_MDOWN:
      swingV = PANASONIC_AIRCON2_VS_MDOWN;
      break;
    case VDIR_DOWN:
      swingV = PANASONIC_AIRCON2_VS_DOWN;
      break;
  }

  switch (swingHCmd)
  {
    case HDIR_AUTO:
    case HDIR_SWING:
      swingH = PANASONIC_AIRCON2_HS_AUTO;
      break;
    case HDIR_MIDDLE:
      swingH = PANASONIC_AIRCON2_HS_MIDDLE;
      break;
    case HDIR_LEFT:
      swingH = PANASONIC_AIRCON2_HS_LEFT;
      break;
    case HDIR_MLEFT:
      swingH = PANASONIC_AIRCON2_HS_MLEFT;
      break;
    case HDIR_RIGHT:
      swingH = PANASONIC_AIRCON2_HS_RIGHT;
      break;
    case HDIR_MRIGHT:
      swingH = PANASONIC_AIRCON2_HS_MRIGHT;
      break;
  }

  // NKE has +8 / + 10 maintenance heating, which also means MAX fanspeed
  if ( _panasonicModel == PANASONIC_NKE )
  {
    if ( temperatureCmd == 8 || temperatureCmd == 10 )
    {
      temperature = temperatureCmd;
      fanSpeed = PANASONIC_AIRCON2_FAN5;
    }
  }

  sendPanasonic(IR, operatingMode, fanSpeed, temperature, swingV, swingH);
}

// Send the Panasonic DKE/JKE/NKE code
void PanasonicHeatpumpIR::sendPanasonic(IRSender& IR, byte operatingMode, byte fanSpeed, byte temperature, byte swingV, byte swingH)
{
  // Only bytes 13, 14, 16, 17 and 26 are modified, DKE and JKE seem to share the same template?
  static const prog_uint8_t panasonicProgmemTemplate[][27] PROGMEM = {
    // DKE, model 0
    { 0x02, 0x20, 0xE0, 0x04, 0x00, 0x00, 0x00, 0x06, 0x02, 0x20, 0xE0, 0x04, 0x00, 0x00, 0x00, 0x80, 0x00, 0x00, 0x00, 0x0E, 0xE0, 0x00, 0x00, 0x01, 0x00, 0x06, 0x00 },
    // JKE, model 1
    { 0x02, 0x20, 0xE0, 0x04, 0x00, 0x00, 0x00, 0x06, 0x02, 0x20, 0xE0, 0x04, 0x00, 0x00, 0x00, 0x80, 0x00, 0x00, 0x00, 0x0E, 0xE0, 0x00, 0x00, 0x81, 0x00, 0x00, 0x00 },
    // NKE, model 2
    { 0x02, 0x20, 0xE0, 0x04, 0x00, 0x00, 0x00, 0x06, 0x02, 0x20, 0xE0, 0x04, 0x00, 0x00, 0x00, 0x80, 0x00, 0x06, 0x00, 0x0E, 0xE0, 0x00, 0x00, 0x81, 0x00, 0x00, 0x00 }
    //   0     1     2     3     4     5     6     7     8     9    10    11    12    13    14   15     16    17    18    19    20    21    22    23    24    25    26
  };

  // Save some SRAM by only having one copy of the template on the SRAM
  byte panasonicTemplate[27];
  memcpy_P(panasonicTemplate, panasonicProgmemTemplate[_panasonicModel], sizeof(panasonicTemplate));

  panasonicTemplate[13] = operatingMode;
  panasonicTemplate[14] = temperature << 1;
  panasonicTemplate[16] = fanSpeed | swingV;

  // Only the DKE model has a setting for the horizontal air flow
  if ( _panasonicModel == PANASONIC_DKE) {
    panasonicTemplate[17] = swingH;
  }

  // Checksum calculation

  byte checksum = 0xF4;

  for (int i=0; i<26; i++) {
    checksum += panasonicTemplate[i];
  }

  panasonicTemplate[26] = checksum;

  // 40 kHz PWM frequency
  IR.setFrequency(40);

  // Header
  IR.mark(PANASONIC_AIRCON2_HDR_MARK);
  IR.space(PANASONIC_AIRCON2_HDR_SPACE);

  // First 8 bytes
  for (int i=0; i<8; i++) {
    IR.sendIRByte(panasonicTemplate[i], PANASONIC_AIRCON2_BIT_MARK, PANASONIC_AIRCON2_ZERO_SPACE, PANASONIC_AIRCON2_ONE_SPACE);
  }

  // Pause
  IR.mark(PANASONIC_AIRCON2_BIT_MARK);
  IR.space(PANASONIC_AIRCON2_MSG_SPACE);

  // Header
  IR.mark(PANASONIC_AIRCON2_HDR_MARK);
  IR.space(PANASONIC_AIRCON2_HDR_SPACE);

  // Last 19 bytes
  for (int i=8; i<27; i++) {
    IR.sendIRByte(panasonicTemplate[i], PANASONIC_AIRCON2_BIT_MARK, PANASONIC_AIRCON2_ZERO_SPACE, PANASONIC_AIRCON2_ONE_SPACE);
  }

  IR.mark(PANASONIC_AIRCON2_BIT_MARK);
  IR.space(0);
}