iaqcore.cpp

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#include "iaqcore.h"
#include "esphome/core/hal.h"
#include "esphome/core/helpers.h"
#include "esphome/core/log.h"
 
namespace esphome::iaqcore {
 
ESPHOME_LOG_TAG(TAG, "iaqcore");
 
enum IAQCoreErrorCode : uint8_t { ERROR_OK = 0, ERROR_RUNIN = 0x10, ERROR_BUSY = 0x01, ERROR_ERROR = 0x80 };
 
static constexpr size_t SENSOR_DATA_LENGTH = 9;
 
struct SensorData {
  int32_t resistance;
  uint16_t co2;
  uint16_t tvoc;
  IAQCoreErrorCode status;
 
  SensorData(const uint8_t *buffer) {
    this->co2 = encode_uint16(buffer[0], buffer[1]);
    this->status = static_cast<IAQCoreErrorCode>(buffer[2]);
    this->resistance = encode_uint32(buffer[3], buffer[4], buffer[5], buffer[6]);
    this->tvoc = encode_uint16(buffer[7], buffer[8]);
  }
};
 
void IAQCore::setup() {
  if (this->write(nullptr, 0) != i2c::ERROR_OK) {
    this->mark_failed(LOG_STR(ESP_LOG_MSG_COMM_FAIL));
    return;
  }
}
 
void IAQCore::update() {
  uint8_t buffer[SENSOR_DATA_LENGTH];
 
  if (this->read_register(0xB5, buffer, SENSOR_DATA_LENGTH) != i2c::ERROR_OK) {
    ESP_LOGD(TAG, "Read failed");
    this->status_set_warning();
    this->publish_nans_();
    return;
  }
 
  SensorData data(buffer);
 
  switch (data.status) {
    case ERROR_OK:
      ESP_LOGD(TAG, "OK");
      break;
    case ERROR_RUNIN:
      ESP_LOGI(TAG, "Warming up");
      break;
    case ERROR_BUSY:
      ESP_LOGI(TAG, "Busy");
      break;
    case ERROR_ERROR:
      ESP_LOGE(TAG, "Error");
      break;
  }
 
  if (data.status != ERROR_OK) {
    this->status_set_warning();
    this->publish_nans_();
    return;
  }
 
  if (this->co2_ != nullptr) {
    this->co2_->publish_state(data.co2);
  }
  if (this->tvoc_ != nullptr) {
    this->tvoc_->publish_state(data.tvoc);
  }
 
  this->status_clear_warning();
}
 
void IAQCore::publish_nans_() {
  if (this->co2_ != nullptr) {
    this->co2_->publish_state(NAN);
  }
  if (this->tvoc_ != nullptr) {
    this->tvoc_->publish_state(NAN);
  }
}
 
void IAQCore::dump_config() {
  ESP_LOGCONFIG(TAG, "AMS iAQ Core:");
  LOG_I2C_DEVICE(this);
  LOG_UPDATE_INTERVAL(this);
  LOG_SENSOR("  ", "CO2", this->co2_);
  LOG_SENSOR("  ", "TVOC", this->tvoc_);
}
 
}  // namespace esphome::iaqcore