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Fix SGP30 incorrect baseline reading/writing (#936)

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* Split the SGP30 baseline into 2 values

- According to the SGP30 datasheet, each eCO2 and TVOC baseline is a 2-byte value (MSB first)
- The current implementation ignores the MSB of each of the value
- Update the schema to allow 2 different baseline values (optional, but both need to be specified for the baseline to apply)

* Make both eCO2 and TVOC required if the optional baseline is defined

* Make dump_config() looks better
This commit is contained in:
Panuruj Khambanonda (PK)
2020-01-12 07:42:18 -08:00
committed by Otto Winter
parent 92d93d658c
commit 170d52e0db
3 changed files with 37 additions and 22 deletions
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esphome/components/sgp30/sgp30.cpp
+23 -17
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@@ -74,9 +74,9 @@ void SGP30Component::setup() {
}
// Sensor baseline reliability timer
if (this->baseline_ > 0) {
if (this->eco2_baseline_ > 0 && this->tvoc_baseline_ > 0) {
this->required_warm_up_time_ = IAQ_BASELINE_WARM_UP_SECONDS_WITH_BASELINE_PROVIDED;
this->write_iaq_baseline_(this->baseline_);
this->write_iaq_baseline_(this->eco2_baseline_, this->tvoc_baseline_);
} else {
this->required_warm_up_time_ = IAQ_BASELINE_WARM_UP_SECONDS_WITHOUT_BASELINE;
}
@@ -106,10 +106,10 @@ void SGP30Component::read_iaq_baseline_() {
return;
}
uint8_t eco2baseline = (raw_data[0]);
uint8_t tvocbaseline = (raw_data[1]);
uint16_t eco2baseline = (raw_data[0]);
uint16_t tvocbaseline = (raw_data[1]);
ESP_LOGI(TAG, "Current eCO2 & TVOC baseline: 0x%04X", uint16_t((eco2baseline << 8) | (tvocbaseline & 0xFF)));
ESP_LOGI(TAG, "Current eCO2 baseline: 0x%04X, TVOC baseline: 0x%04X", eco2baseline, tvocbaseline);
this->status_clear_warning();
});
} else {
@@ -159,18 +159,19 @@ void SGP30Component::send_env_data_() {
}
}
void SGP30Component::write_iaq_baseline_(uint16_t baseline) {
uint8_t e_c_o2_baseline = baseline >> 8;
uint8_t tvoc_baseline = baseline & 0xFF;
uint8_t data[4];
void SGP30Component::write_iaq_baseline_(uint16_t eco2_baseline, uint16_t tvoc_baseline) {
uint8_t data[7];
data[0] = SGP30_CMD_SET_IAQ_BASELINE & 0xFF;
data[1] = e_c_o2_baseline;
data[2] = tvoc_baseline;
data[3] = sht_crc_(e_c_o2_baseline, tvoc_baseline);
if (!this->write_bytes(SGP30_CMD_SET_IAQ_BASELINE >> 8, data, 4)) {
ESP_LOGE(TAG, "Error applying baseline: 0x%04X", baseline);
data[1] = eco2_baseline >> 8;
data[2] = eco2_baseline & 0xFF;
data[3] = sht_crc_(data[1], data[2]);
data[4] = tvoc_baseline >> 8;
data[5] = tvoc_baseline & 0xFF;
data[6] = sht_crc_(data[4], data[5]);
if (!this->write_bytes(SGP30_CMD_SET_IAQ_BASELINE >> 8, data, 7)) {
ESP_LOGE(TAG, "Error applying eCO2 baseline: 0x%04X, TVOC baseline: 0x%04X", eco2_baseline, tvoc_baseline);
} else
ESP_LOGI(TAG, "Initial baseline 0x%04X applied successfully!", baseline);
ESP_LOGI(TAG, "Initial eCO2 and TVOC baselines applied successfully!");
}
void SGP30Component::dump_config() {
@@ -196,8 +197,13 @@ void SGP30Component::dump_config() {
}
} else {
ESP_LOGCONFIG(TAG, " Serial number: %llu", this->serial_number_);
ESP_LOGCONFIG(TAG, " Baseline: 0x%04X%s", this->baseline_,
((this->baseline_ != 0x0000) ? " (enabled)" : " (disabled)"));
if (this->eco2_baseline_ != 0x0000 && this->tvoc_baseline_ != 0x0000) {
ESP_LOGCONFIG(TAG, " Baseline:");
ESP_LOGCONFIG(TAG, " eCO2 Baseline: 0x%04X", this->eco2_baseline_);
ESP_LOGCONFIG(TAG, " TVOC Baseline: 0x%04X", this->tvoc_baseline_);
} else {
ESP_LOGCONFIG(TAG, " Baseline: No baseline configured");
}
ESP_LOGCONFIG(TAG, " Warm up time: %lds", this->required_warm_up_time_);
}
LOG_UPDATE_INTERVAL(this);