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68ce1b18c4
* Add NTC and resistance sensor Fixes https://github.com/esphome/feature-requests/issues/248 * Fix * Fix platformio4 moved get_project_dir
32 lines
815 B
C++
32 lines
815 B
C++
#include "ntc.h"
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#include "esphome/core/log.h"
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namespace esphome {
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namespace ntc {
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static const char *TAG = "ntc";
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void NTC::setup() {
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this->sensor_->add_on_state_callback([this](float value) { this->process_(value); });
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if (this->sensor_->has_state())
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this->process_(this->sensor_->state);
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}
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void NTC::dump_config() { LOG_SENSOR("", "NTC Sensor", this) }
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float NTC::get_setup_priority() const { return setup_priority::DATA; }
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void NTC::process_(float value) {
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if (isnan(value)) {
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this->publish_state(NAN);
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return;
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}
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float lr = logf(value);
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float v = this->a_ + this->b_ * lr + this->c_ * lr * lr * lr;
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float temp = 1 / v - 273.15f;
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ESP_LOGD(TAG, "'%s' - Temperature: %.1f°C", this->name_.c_str(), temp);
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this->publish_state(temp);
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}
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} // namespace ntc
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} // namespace esphome
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