mirror of
https://github.com/esphome/esphome.git
synced 2025-09-29 16:42:19 +01:00
70 lines
1.9 KiB
C++
70 lines
1.9 KiB
C++
#include "gp2y1010au0f.h"
|
|
#include "esphome/core/hal.h"
|
|
#include "esphome/core/log.h"
|
|
|
|
#include <cinttypes>
|
|
|
|
namespace esphome {
|
|
namespace gp2y1010au0f {
|
|
|
|
static const char *const TAG = "gp2y1010au0f";
|
|
static const float MIN_VOLTAGE = 0.0f;
|
|
static const float MAX_VOLTAGE = 4.0f;
|
|
|
|
void GP2Y1010AU0FSensor::dump_config() {
|
|
LOG_SENSOR("", "Sharp GP2Y1010AU0F PM2.5 Sensor", this);
|
|
ESP_LOGCONFIG(TAG,
|
|
" Sampling duration: %" PRId32 " ms\n"
|
|
" ADC voltage multiplier: %.3f",
|
|
this->sample_duration_, this->voltage_multiplier_);
|
|
LOG_UPDATE_INTERVAL(this);
|
|
}
|
|
|
|
void GP2Y1010AU0FSensor::update() {
|
|
is_sampling_ = true;
|
|
|
|
this->set_timeout("read", this->sample_duration_, [this]() {
|
|
this->is_sampling_ = false;
|
|
if (this->num_samples_ == 0)
|
|
return;
|
|
|
|
float mean = this->sample_sum_ / float(this->num_samples_);
|
|
ESP_LOGD(TAG, "ADC read voltage: %.3f V (mean from %" PRId32 " samples)", mean, this->num_samples_);
|
|
|
|
// PM2.5 calculation
|
|
// ref: https://www.howmuchsnow.com/arduino/airquality/
|
|
int16_t pm_2_5_value = 170 * mean;
|
|
this->publish_state(pm_2_5_value);
|
|
});
|
|
|
|
// reset readings
|
|
this->num_samples_ = 0;
|
|
this->sample_sum_ = 0.0f;
|
|
}
|
|
|
|
void GP2Y1010AU0FSensor::loop() {
|
|
if (!this->is_sampling_)
|
|
return;
|
|
|
|
// enable the internal IR LED
|
|
this->led_output_->turn_on();
|
|
// wait for the sensor to stabilize
|
|
delayMicroseconds(this->sample_wait_before_);
|
|
// perform a single sample
|
|
float read_voltage = this->source_->sample();
|
|
// disable the internal IR LED
|
|
this->led_output_->turn_off();
|
|
|
|
if (std::isnan(read_voltage))
|
|
return;
|
|
read_voltage = read_voltage * this->voltage_multiplier_ - this->voltage_offset_;
|
|
if (read_voltage < MIN_VOLTAGE || read_voltage > MAX_VOLTAGE)
|
|
return;
|
|
|
|
this->num_samples_++;
|
|
this->sample_sum_ += read_voltage;
|
|
}
|
|
|
|
} // namespace gp2y1010au0f
|
|
} // namespace esphome
|