ESPHome climate component for Electra AC (RC-3 IR remote)

ElectraClimate.h

#include "esphome.h"

static const char *TAG = "electra.climate";

typedef enum IRElectraMode {
    IRElectraModeCool = 0b001,
    IRElectraModeHeat = 0b010,
    IRElectraModeAuto = 0b011,
    IRElectraModeDry  = 0b100,
    IRElectraModeFan  = 0b101,
    IRElectraModeOff  = 0b111
} IRElectraMode;

typedef enum IRElectraFan {
    IRElectraFanLow    = 0b00,
    IRElectraFanMedium = 0b01,
    IRElectraFanHigh   = 0b10,
    IRElectraFanAuto   = 0b11
} IRElectraFan;

// That configuration has a total of 34 bits
//    33: Power bit, if this bit is ON, the A/C will toggle it's power.
// 32-30: Mode - Cool, heat etc.
// 29-28: Fan - Low, medium etc.
// 27-26: Zeros
//    25: Swing On/Off
//    24: iFeel On/Off
//    23: Zero
// 22-19: Temperature, where 15 is 0000, 30 is 1111
//    18: Sleep mode On/Off
// 17- 2: Zeros
//     1: One
//     0: Zero
typedef union ElectraCode {
    uint64_t num;
    struct {
        uint64_t zeros1 : 1;
        uint64_t ones1 : 1;
        uint64_t zeros2 : 16;
        uint64_t sleep : 1;
        uint64_t temperature : 4;
        uint64_t zeros3 : 1;
        uint64_t ifeel : 1;
        uint64_t swing : 1;
        uint64_t zeros4 : 2;
        uint64_t fan : 2;
        uint64_t mode : 3;
        uint64_t power : 1;
    };
} ElectraCode;

const uint8_t ELECTRA_TEMP_MIN = 16;  // Celsius
const uint8_t ELECTRA_TEMP_MAX = 30;  // Celsius

#define ELECTRA_TIME_UNIT 1000
#define ELECTRA_NUM_BITS 34

class ElectraClimate : public climate::Climate, public Component {
 public:
  void setup() override
  {
    if (this->sensor_) {
      this->sensor_->add_on_state_callback([this](float state) {
        this->current_temperature = state;

        // current temperature changed, publish state
        this->publish_state();
      });
      this->current_temperature = this->sensor_->state;
    } else
      this->current_temperature = NAN;

    // restore set points
    auto restore = this->restore_state_();
    if (restore.has_value()) {
      restore->apply(this);
    } else {
      // restore from defaults
      this->mode = climate::CLIMATE_MODE_AUTO;

      // initialize target temperature to some value so that it's not NAN
      this->target_temperature = roundf(this->current_temperature);
    }

    this->active_mode_ = this->mode;
  }

  void set_transmitter(remote_transmitter::RemoteTransmitterComponent *transmitter) {
    this->transmitter_ = transmitter;
  }

  void set_supports_cool(bool supports_cool) { this->supports_cool_ = supports_cool; }
  void set_supports_heat(bool supports_heat) { this->supports_heat_ = supports_heat; }
  void set_sensor(sensor::Sensor *sensor) { this->sensor_ = sensor; }

  /// Override control to change settings of the climate device
  void control(const climate::ClimateCall &call) override
  {
    if (call.get_mode().has_value())
      this->mode = *call.get_mode();
    if (call.get_target_temperature().has_value())
      this->target_temperature = *call.get_target_temperature();

    this->transmit_state_();
    this->publish_state();

    this->active_mode_ = this->mode;
  }

  /// Return the traits of this controller
  climate::ClimateTraits traits() override
  {
    auto traits = climate::ClimateTraits();
    traits.set_supports_current_temperature(this->sensor_ != nullptr);
    traits.set_supports_auto_mode(true);
    traits.set_supports_cool_mode(this->supports_cool_);
    traits.set_supports_heat_mode(this->supports_heat_);
    traits.set_supports_two_point_target_temperature(false);
    traits.set_supports_away(false);
    traits.set_visual_min_temperature(ELECTRA_TEMP_MIN);
    traits.set_visual_max_temperature(ELECTRA_TEMP_MAX);
    traits.set_visual_temperature_step(1);
    return traits;
  }

  /// Transmit the state of this climate controller via IR
  void transmit_state_()
  {
    ElectraCode code = { 0 };
    code.ones1 = 1;
    code.fan = IRElectraFan::IRElectraFanAuto;

    switch (this->mode) {
      case climate::CLIMATE_MODE_COOL:
        code.mode = IRElectraMode::IRElectraModeCool;
        code.power = this->active_mode_ == climate::CLIMATE_MODE_OFF ? 1 : 0;
        break;
      case climate::CLIMATE_MODE_HEAT:
        code.mode = IRElectraMode::IRElectraModeHeat;
        code.power = this->active_mode_ == climate::CLIMATE_MODE_OFF ? 1 : 0;
        break;
      case climate::CLIMATE_MODE_AUTO:
        code.mode = IRElectraMode::IRElectraModeAuto;
        code.power = this->active_mode_ == climate::CLIMATE_MODE_OFF ? 1 : 0;
        break;
      case climate::CLIMATE_MODE_OFF:
      default:
        code.mode = IRElectraMode::IRElectraModeOff;
        break;
    }

    auto temp = (uint8_t) roundf(clamp(this->target_temperature, ELECTRA_TEMP_MIN, ELECTRA_TEMP_MAX));
    code.temperature = temp - 15;

    ESP_LOGD(TAG, "Sending electra code: %lld", code.num);

    auto transmit = this->transmitter_->transmit();
    auto data = transmit.get_data();

    data->set_carrier_frequency(38000);
    uint16_t repeat = 3;

    for (uint16_t r = 0; r < repeat; r++) {
      // Header
      data->mark(3 * ELECTRA_TIME_UNIT);
      uint16_t next_value = 3 * ELECTRA_TIME_UNIT;
      bool is_next_space = true;

      // Data
      for (int j = ELECTRA_NUM_BITS - 1; j>=0; j--)
      {
        uint8_t bit = (code.num >> j) & 1;

        // if current index is SPACE
        if (is_next_space) {
          // one is one unit low, then one unit up
          // since we're pointing at SPACE, we should increase it by a unit
          // then add another MARK unit
          if (bit == 1) {
            data->space(next_value + ELECTRA_TIME_UNIT);
            next_value = ELECTRA_TIME_UNIT;
            is_next_space = false;

          } else {
            // we need a MARK unit, then SPACE unit
            data->space(next_value);
            data->mark(ELECTRA_TIME_UNIT);
            next_value = ELECTRA_TIME_UNIT;
            is_next_space = true;
          }

        } else {
          // current index is MARK
          
          // one is one unit low, then one unit up
          if (bit == 1) {
            data->mark(next_value);
            data->space(ELECTRA_TIME_UNIT);
            next_value = ELECTRA_TIME_UNIT;
            is_next_space = false;

          } else {
            data->mark(next_value + ELECTRA_TIME_UNIT);
            next_value = ELECTRA_TIME_UNIT;
            is_next_space = true;
          }
        }
      }

      // Last value must be SPACE
      data->space(next_value);
    }

    // Footer
    data->mark(4 * ELECTRA_TIME_UNIT);

    transmit.perform();
  }

  ClimateMode active_mode_;

  bool supports_cool_{true};
  bool supports_heat_{true};

  remote_transmitter::RemoteTransmitterComponent *transmitter_;
  sensor::Sensor *sensor_{nullptr};
};

@omersht I figured out the problem. I will be happy to discuss.

you may contact me on doron dot schlumm at HP dot com

@omersht I figured out the problem. I will be happy to discuss.

Great, can you tell me what have you discoverd? maybe open an issue on the github page?