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Code Issues Releases Wiki Activity

[ESP32 ADC] Add option for raw uncalibrated output (#2663)

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This commit is contained in:
Carlos Garcia Saura
2021-11-10 19:12:57 +01:00
committed by GitHub
parent 2ac232e634
commit 219b225ac0
3 changed files with 26 additions and 11 deletions
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17
esphome/components/adc/adc_sensor.cpp
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@@ -91,17 +91,21 @@ void ADCSensor::dump_config() {
float ADCSensor::get_setup_priority() const { return setup_priority::DATA; }
void ADCSensor::update() {
float value_v = this->sample();
ESP_LOGD(TAG, "'%s': Got voltage=%.2fV", this->get_name().c_str(), value_v);
ESP_LOGD(TAG, "'%s': Got voltage=%.4fV", this->get_name().c_str(), value_v);
this->publish_state(value_v);
}
#ifdef USE_ESP8266
float ADCSensor::sample() {
#ifdef USE_ADC_SENSOR_VCC
return ESP.getVcc() / 1024.0f; // NOLINT(readability-static-accessed-through-instance)
int raw = ESP.getVcc(); // NOLINT(readability-static-accessed-through-instance)
#else
return analogRead(this->pin_->get_pin()) / 1024.0f; // NOLINT
int raw = analogRead(this->pin_->get_pin()); // NOLINT
#endif
if (output_raw_) {
return raw;
}
return raw / 1024.0f;
}
#endif
@@ -112,6 +116,9 @@ float ADCSensor::sample() {
if (raw == -1) {
return NAN;
}
if (output_raw_) {
return raw;
}
uint32_t mv = esp_adc_cal_raw_to_voltage(raw, &cal_characteristics_[(int) attenuation_]);
return mv / 1000.0f;
}
@@ -135,10 +142,6 @@ float ADCSensor::sample() {
if (raw0 == -1 || raw2 == -1 || raw6 == -1 || raw11 == -1) {
return NAN;
}
// prevent divide by zero
if (raw0 == 0 && raw2 == 0 && raw6 == 0 && raw11 == 0) {
return 0;
}
uint32_t mv11 = esp_adc_cal_raw_to_voltage(raw11, &cal_characteristics_[(int) ADC_ATTEN_DB_11]);
uint32_t mv6 = esp_adc_cal_raw_to_voltage(raw6, &cal_characteristics_[(int) ADC_ATTEN_DB_6]);