47 lines
1.2 KiB
C++
47 lines
1.2 KiB
C++
#include "resistance_sensor.h"
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#include "esphome/core/log.h"
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namespace esphome {
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namespace resistance {
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static const char *const TAG = "resistance";
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void ResistanceSensor::dump_config() {
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LOG_SENSOR("", "Resistance Sensor", this);
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ESP_LOGCONFIG(TAG,
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" Configuration: %s\n"
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" Resistor: %.2fΩ\n"
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" Reference Voltage: %.1fV",
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this->configuration_ == UPSTREAM ? "UPSTREAM" : "DOWNSTREAM", this->resistor_,
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this->reference_voltage_);
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}
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void ResistanceSensor::process_(float value) {
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if (std::isnan(value)) {
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this->publish_state(NAN);
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return;
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}
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float res = 0;
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switch (this->configuration_) {
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case UPSTREAM:
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if (value == 0.0f) {
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res = NAN;
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} else {
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res = (this->reference_voltage_ - value) / value;
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}
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break;
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case DOWNSTREAM:
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if (value == this->reference_voltage_) {
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res = NAN;
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} else {
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res = value / (this->reference_voltage_ - value);
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}
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break;
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}
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res *= this->resistor_;
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ESP_LOGD(TAG, "'%s' - Resistance %.1fΩ", this->name_.c_str(), res);
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this->publish_state(res);
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}
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} // namespace resistance
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} // namespace esphome
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