sfa30.cpp

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#include "sfa30.h"
#include "esphome/core/log.h"
 
namespace esphome::sfa30 {
 
ESPHOME_LOG_TAG(TAG, "sfa30");
 
static const uint16_t SFA30_CMD_GET_DEVICE_MARKING = 0xD060;
static const uint16_t SFA30_CMD_START_CONTINUOUS_MEASUREMENTS = 0x0006;
static const uint16_t SFA30_CMD_READ_MEASUREMENT = 0x0327;
 
void SFA30Component::setup() {
  // Serial Number identification
  uint16_t raw_device_marking[16];
  if (!this->get_register(SFA30_CMD_GET_DEVICE_MARKING, raw_device_marking, 16, 5)) {
    this->mark_failed(LOG_STR("Unable to read device marking"));
    return;
  }
 
  for (size_t i = 0; i < 16; i++) {
    this->device_marking_[i * 2] = static_cast<char>(raw_device_marking[i] >> 8);
    this->device_marking_[i * 2 + 1] = static_cast<char>(raw_device_marking[i] & 0xFF);
  }
  ESP_LOGD(TAG, "Device Marking: '%s'", this->device_marking_);
 
  if (!this->write_command(SFA30_CMD_START_CONTINUOUS_MEASUREMENTS)) {
    this->mark_failed(LOG_STR("Error starting measurements"));
    return;
  }
}
 
void SFA30Component::dump_config() {
  ESP_LOGCONFIG(TAG, "sfa30:");
  LOG_I2C_DEVICE(this);
  LOG_UPDATE_INTERVAL(this);
  ESP_LOGCONFIG(TAG, "  Device Marking: '%s'", this->device_marking_);
  LOG_SENSOR("  ", "Formaldehyde", this->formaldehyde_sensor_);
  LOG_SENSOR("  ", "Humidity", this->humidity_sensor_);
  LOG_SENSOR("  ", "Temperature", this->temperature_sensor_);
}
 
void SFA30Component::update() {
  if (!this->write_command(SFA30_CMD_READ_MEASUREMENT)) {
    ESP_LOGW(TAG, "Error reading measurement!");
    this->status_set_warning();
    return;
  }
 
  this->set_timeout(5, [this]() {
    uint16_t raw_data[3];
    if (!this->read_data(raw_data, 3)) {
      ESP_LOGW(TAG, "Error reading measurement data!");
      this->status_set_warning();
      return;
    }
 
    if (this->formaldehyde_sensor_ != nullptr) {
      const float formaldehyde = static_cast<int16_t>(raw_data[0]) / 5.0f;
      this->formaldehyde_sensor_->publish_state(formaldehyde);
    }
 
    if (this->humidity_sensor_ != nullptr) {
      const float humidity = static_cast<int16_t>(raw_data[1]) / 100.0f;
      this->humidity_sensor_->publish_state(humidity);
    }
 
    if (this->temperature_sensor_ != nullptr) {
      const float temperature = static_cast<int16_t>(raw_data[2]) / 200.0f;
      this->temperature_sensor_->publish_state(temperature);
    }
 
    this->status_clear_warning();
  });
}
 
}  // namespace esphome::sfa30