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Add support for SGP30 eCO2 and TVOC sensors (#679)
* Add support for SGP30 eCO2 and TVOC sensors * Added test for SGP30 * Lint issues fixed * Lint fixes * Fixed light lengths * Cleanup * Add support for Sensirion SCD30 CO2 sensors * Fixed few lint issues * Lint fixes * Fixed line ending for lint * Cleanup * Refactored float conversion * Refactor unnecessary return * Refactoring and cleanup * Updated uptime_sensor_ referencing and simplified checking on availability of copensation * Temperature and Humidity source moved to a separate compensation block; Dependency for Uptime sensor removed. * Both humidity_source and temperature_source are now mandatory if the compensation block is defined; * Clean up * Cleanup * Cleanup in search of perfection * Use correct comment style Co-authored-by: Otto Winter <otto@otto-winter.com>
This commit is contained in:
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5 changed files with 412 additions and 0 deletions
0
esphome/components/sgp30/__init__.py
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esphome/components/sgp30/__init__.py
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esphome/components/sgp30/sensor.py
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esphome/components/sgp30/sensor.py
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import esphome.codegen as cg
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import esphome.config_validation as cv
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from esphome.components import i2c, sensor
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from esphome.const import CONF_ID, ICON_RADIATOR, UNIT_PARTS_PER_MILLION, \
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UNIT_PARTS_PER_BILLION, ICON_PERIODIC_TABLE_CO2
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DEPENDENCIES = ['i2c']
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sgp30_ns = cg.esphome_ns.namespace('sgp30')
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SGP30Component = sgp30_ns.class_('SGP30Component', cg.PollingComponent, i2c.I2CDevice)
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CONF_ECO2 = 'eco2'
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CONF_TVOC = 'tvoc'
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CONF_BASELINE = 'baseline'
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CONF_UPTIME = 'uptime'
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CONF_COMPENSATION = 'compensation'
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CONF_COMPENSATION_HUMIDITY = 'humidity_source'
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CONF_COMPENSATION_TEMPERATURE = 'temperature_source'
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CONFIG_SCHEMA = cv.Schema({
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cv.GenerateID(): cv.declare_id(SGP30Component),
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cv.Required(CONF_ECO2): sensor.sensor_schema(UNIT_PARTS_PER_MILLION,
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ICON_PERIODIC_TABLE_CO2, 0),
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cv.Required(CONF_TVOC): sensor.sensor_schema(UNIT_PARTS_PER_BILLION, ICON_RADIATOR, 0),
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cv.Optional(CONF_BASELINE): cv.hex_uint16_t,
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cv.Optional(CONF_COMPENSATION): cv.Schema({
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cv.Required(CONF_COMPENSATION_HUMIDITY): cv.use_id(sensor.Sensor),
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cv.Required(CONF_COMPENSATION_TEMPERATURE): cv.use_id(sensor.Sensor)
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}),
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}).extend(cv.polling_component_schema('60s')).extend(i2c.i2c_device_schema(0x58))
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def to_code(config):
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var = cg.new_Pvariable(config[CONF_ID])
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yield cg.register_component(var, config)
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yield i2c.register_i2c_device(var, config)
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if CONF_ECO2 in config:
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sens = yield sensor.new_sensor(config[CONF_ECO2])
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cg.add(var.set_eco2_sensor(sens))
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if CONF_TVOC in config:
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sens = yield sensor.new_sensor(config[CONF_TVOC])
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cg.add(var.set_tvoc_sensor(sens))
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if CONF_BASELINE in config:
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cg.add(var.set_baseline(config[CONF_BASELINE]))
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if CONF_COMPENSATION in config:
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compensation_config = config[CONF_COMPENSATION]
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sens = yield cg.get_variable(compensation_config[CONF_COMPENSATION_HUMIDITY])
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cg.add(var.set_humidity_sensor(sens))
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sens = yield cg.get_variable(compensation_config[CONF_COMPENSATION_TEMPERATURE])
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cg.add(var.set_temperature_sensor(sens))
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295
esphome/components/sgp30/sgp30.cpp
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esphome/components/sgp30/sgp30.cpp
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#include "sgp30.h"
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#include "esphome/core/log.h"
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namespace esphome {
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namespace sgp30 {
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static const char *TAG = "sgp30";
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static const uint16_t SGP30_CMD_GET_SERIAL_ID = 0x3682;
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static const uint16_t SGP30_CMD_GET_FEATURESET = 0x202f;
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static const uint16_t SGP30_CMD_IAQ_INIT = 0x2003;
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static const uint16_t SGP30_CMD_MEASURE_IAQ = 0x2008;
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static const uint16_t SGP30_CMD_SET_ABSOLUTE_HUMIDITY = 0x2061;
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static const uint16_t SGP30_CMD_GET_IAQ_BASELINE = 0x2015;
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static const uint16_t SGP30_CMD_SET_IAQ_BASELINE = 0x201E;
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// Sensor baseline should first be relied on after 1H of operation,
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// if the sensor starts with a baseline value provided
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const long IAQ_BASELINE_WARM_UP_SECONDS_WITH_BASELINE_PROVIDED = 3600;
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// Sensor baseline could first be relied on after 12H of operation,
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// if the sensor starts without any prior baseline value provided
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const long IAQ_BASELINE_WARM_UP_SECONDS_WITHOUT_BASELINE = 43200;
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void SGP30Component::setup() {
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ESP_LOGCONFIG(TAG, "Setting up SGP30...");
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// Serial Number identification
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if (!this->write_command_(SGP30_CMD_GET_SERIAL_ID)) {
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this->error_code_ = COMMUNICATION_FAILED;
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this->mark_failed();
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return;
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}
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uint16_t raw_serial_number[3];
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if (!this->read_data_(raw_serial_number, 3)) {
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this->mark_failed();
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return;
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}
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this->serial_number_ = (uint64_t(raw_serial_number[0]) << 24) | (uint64_t(raw_serial_number[1]) << 16) |
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(uint64_t(raw_serial_number[2]));
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ESP_LOGD(TAG, "Serial Number: %llu", this->serial_number_);
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// Featureset identification for future use
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if (!this->write_command_(SGP30_CMD_GET_FEATURESET)) {
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this->mark_failed();
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return;
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}
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uint16_t raw_featureset[1];
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if (!this->read_data_(raw_featureset, 1)) {
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this->mark_failed();
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return;
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}
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this->featureset_ = raw_featureset[0];
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if (uint16_t(this->featureset_ >> 12) != 0x0) {
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if (uint16_t(this->featureset_ >> 12) == 0x1) {
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// ID matching a different sensor: SGPC3
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this->error_code_ = UNSUPPORTED_ID;
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} else {
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// Unknown ID
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this->error_code_ = INVALID_ID;
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}
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this->mark_failed();
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return;
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}
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ESP_LOGD(TAG, "Product version: 0x%0X", uint16_t(this->featureset_ & 0x1FF));
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// Sensor initialization
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if (!this->write_command_(SGP30_CMD_IAQ_INIT)) {
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ESP_LOGE(TAG, "Sensor sgp30_iaq_init failed.");
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this->error_code_ = MEASUREMENT_INIT_FAILED;
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this->mark_failed();
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return;
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}
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// Sensor baseline reliability timer
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if (this->baseline_ > 0) {
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this->required_warm_up_time_ = IAQ_BASELINE_WARM_UP_SECONDS_WITH_BASELINE_PROVIDED;
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this->write_iaq_baseline_(this->baseline_);
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} else {
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this->required_warm_up_time_ = IAQ_BASELINE_WARM_UP_SECONDS_WITHOUT_BASELINE;
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}
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}
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bool SGP30Component::is_sensor_baseline_reliable_() {
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if ((this->required_warm_up_time_ == 0) || (std::floor(millis() / 1000) >= this->required_warm_up_time_)) {
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// requirement for warm up is removed once the millis uptime surpasses the required warm_up_time
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// this avoids the repetitive warm up when the millis uptime is rolled over every ~40 days
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this->required_warm_up_time_ = 0;
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return true;
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}
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return false;
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}
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void SGP30Component::read_iaq_baseline_() {
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if (this->is_sensor_baseline_reliable_()) {
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if (!this->write_command_(SGP30_CMD_GET_IAQ_BASELINE)) {
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ESP_LOGD(TAG, "Error getting baseline");
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this->status_set_warning();
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return;
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}
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this->set_timeout(50, [this]() {
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uint16_t raw_data[2];
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if (!this->read_data_(raw_data, 2)) {
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this->status_set_warning();
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return;
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}
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uint8_t eco2baseline = (raw_data[0]);
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uint8_t tvocbaseline = (raw_data[1]);
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ESP_LOGI(TAG, "Current eCO2 & TVOC baseline: 0x%04X", uint16_t((eco2baseline << 8) | (tvocbaseline & 0xFF)));
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this->status_clear_warning();
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});
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} else {
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ESP_LOGD(TAG, "Baseline reading not available for: %.0fs",
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(this->required_warm_up_time_ - std::floor(millis() / 1000)));
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}
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}
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void SGP30Component::send_env_data_() {
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if (this->humidity_sensor_ == nullptr && this->temperature_sensor_ == nullptr)
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return;
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float humidity = NAN;
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if (this->humidity_sensor_ != nullptr)
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humidity = this->humidity_sensor_->state;
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if (isnan(humidity) || humidity < 0.0f || humidity > 100.0f) {
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ESP_LOGW(TAG, "Compensation not possible yet: bad humidity data.");
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return;
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} else {
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ESP_LOGD(TAG, "External compensation data received: Humidity %0.2f%%", humidity);
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}
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float temperature = NAN;
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if (this->temperature_sensor_ != nullptr) {
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temperature = float(this->temperature_sensor_->state);
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}
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if (isnan(temperature) || temperature < -40.0f || temperature > 85.0f) {
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ESP_LOGW(TAG, "Compensation not possible yet: bad temperature value data.");
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return;
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} else {
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ESP_LOGD(TAG, "External compensation data received: Temperature %0.2f°C", temperature);
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}
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float absolute_humidity =
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216.7f * (((humidity / 100) * 6.112f * std::exp((17.62f * temperature) / (243.12f + temperature))) /
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(273.15f + temperature));
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uint8_t humidity_full = uint8_t(std::floor(absolute_humidity));
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uint8_t humidity_dec = uint8_t(std::floor((absolute_humidity - std::floor(absolute_humidity)) * 256));
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ESP_LOGD(TAG, "Calculated Absolute humidity: %0.3f g/m³ (0x%04X)", absolute_humidity,
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uint16_t(uint16_t(humidity_full) << 8 | uint16_t(humidity_dec)));
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uint8_t crc = sht_crc_(humidity_full, humidity_dec);
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uint8_t data[4];
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data[0] = SGP30_CMD_SET_ABSOLUTE_HUMIDITY & 0xFF;
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data[1] = humidity_full;
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data[2] = humidity_dec;
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data[3] = crc;
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if (!this->write_bytes(SGP30_CMD_SET_ABSOLUTE_HUMIDITY >> 8, data, 4)) {
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ESP_LOGE(TAG, "Error sending compensation data.");
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}
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}
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void SGP30Component::write_iaq_baseline_(uint16_t baseline) {
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uint8_t e_c_o2_baseline = baseline >> 8;
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uint8_t tvoc_baseline = baseline & 0xFF;
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uint8_t data[4];
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data[0] = SGP30_CMD_SET_IAQ_BASELINE & 0xFF;
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data[1] = e_c_o2_baseline;
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data[2] = tvoc_baseline;
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data[3] = sht_crc_(e_c_o2_baseline, tvoc_baseline);
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if (!this->write_bytes(SGP30_CMD_SET_IAQ_BASELINE >> 8, data, 4)) {
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ESP_LOGE(TAG, "Error applying baseline: 0x%04X", baseline);
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} else
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ESP_LOGI(TAG, "Initial baseline 0x%04X applied successfully!", baseline);
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}
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void SGP30Component::dump_config() {
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ESP_LOGCONFIG(TAG, "SGP30:");
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LOG_I2C_DEVICE(this);
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if (this->is_failed()) {
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switch (this->error_code_) {
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case COMMUNICATION_FAILED:
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ESP_LOGW(TAG, "Communication failed! Is the sensor connected?");
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break;
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case MEASUREMENT_INIT_FAILED:
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ESP_LOGW(TAG, "Measurement Initialization failed!");
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break;
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case INVALID_ID:
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ESP_LOGW(TAG, "Sensor reported an invalid ID. Is this an SGP30?");
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break;
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case UNSUPPORTED_ID:
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ESP_LOGW(TAG, "Sensor reported an unsupported ID (SGPC3).");
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break;
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default:
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ESP_LOGW(TAG, "Unknown setup error!");
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break;
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}
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} else {
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ESP_LOGCONFIG(TAG, " Serial number: %llu", this->serial_number_);
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ESP_LOGCONFIG(TAG, " Baseline: 0x%04X%s", this->baseline_,
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((this->baseline_ != 0x0000) ? " (enabled)" : " (disabled)"));
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ESP_LOGCONFIG(TAG, " Warm up time: %lds", this->required_warm_up_time_);
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}
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LOG_UPDATE_INTERVAL(this);
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LOG_SENSOR(" ", "eCO2", this->eco2_sensor_);
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LOG_SENSOR(" ", "TVOC", this->tvoc_sensor_);
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if (this->humidity_sensor_ != nullptr && this->temperature_sensor_ != nullptr) {
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ESP_LOGCONFIG(TAG, " Compensation:");
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LOG_SENSOR(" ", "Temperature Source:", this->temperature_sensor_);
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LOG_SENSOR(" ", "Humidity Source:", this->humidity_sensor_);
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} else {
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ESP_LOGCONFIG(TAG, " Compensation: No source configured");
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}
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}
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void SGP30Component::update() {
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if (!this->write_command_(SGP30_CMD_MEASURE_IAQ)) {
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this->status_set_warning();
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return;
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}
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this->set_timeout(50, [this]() {
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uint16_t raw_data[2];
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if (!this->read_data_(raw_data, 2)) {
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this->status_set_warning();
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return;
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}
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float eco2 = (raw_data[0]);
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float tvoc = (raw_data[1]);
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ESP_LOGD(TAG, "Got eCO2=%.1fppm TVOC=%.1fppb", eco2, tvoc);
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if (this->eco2_sensor_ != nullptr)
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this->eco2_sensor_->publish_state(eco2);
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if (this->tvoc_sensor_ != nullptr)
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this->tvoc_sensor_->publish_state(tvoc);
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this->status_clear_warning();
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this->send_env_data_();
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this->read_iaq_baseline_();
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});
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}
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bool SGP30Component::write_command_(uint16_t command) {
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// Warning ugly, trick the I2Ccomponent base by setting register to the first 8 bit.
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return this->write_byte(command >> 8, command & 0xFF);
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}
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uint8_t SGP30Component::sht_crc_(uint8_t data1, uint8_t data2) {
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uint8_t bit;
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uint8_t crc = 0xFF;
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crc ^= data1;
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for (bit = 8; bit > 0; --bit) {
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if (crc & 0x80)
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crc = (crc << 1) ^ 0x131;
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else
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crc = (crc << 1);
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}
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crc ^= data2;
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for (bit = 8; bit > 0; --bit) {
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if (crc & 0x80)
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crc = (crc << 1) ^ 0x131;
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else
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crc = (crc << 1);
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}
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return crc;
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}
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bool SGP30Component::read_data_(uint16_t *data, uint8_t len) {
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const uint8_t num_bytes = len * 3;
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auto *buf = new uint8_t[num_bytes];
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if (!this->parent_->raw_receive(this->address_, buf, num_bytes)) {
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delete[](buf);
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return false;
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}
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for (uint8_t i = 0; i < len; i++) {
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const uint8_t j = 3 * i;
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uint8_t crc = sht_crc_(buf[j], buf[j + 1]);
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if (crc != buf[j + 2]) {
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ESP_LOGE(TAG, "CRC8 Checksum invalid! 0x%02X != 0x%02X", buf[j + 2], crc);
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delete[](buf);
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return false;
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}
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data[i] = (buf[j] << 8) | buf[j + 1];
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}
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delete[](buf);
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return true;
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}
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} // namespace sgp30
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} // namespace esphome
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54
esphome/components/sgp30/sgp30.h
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esphome/components/sgp30/sgp30.h
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#pragma once
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#include "esphome/core/component.h"
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#include "esphome/components/sensor/sensor.h"
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#include "esphome/components/i2c/i2c.h"
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#include <cmath>
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namespace esphome {
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namespace sgp30 {
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/// This class implements support for the Sensirion SGP30 i2c GAS (VOC and CO2eq) sensors.
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class SGP30Component : public PollingComponent, public i2c::I2CDevice {
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public:
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void set_eco2_sensor(sensor::Sensor *eco2) { eco2_sensor_ = eco2; }
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void set_tvoc_sensor(sensor::Sensor *tvoc) { tvoc_sensor_ = tvoc; }
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void set_baseline(uint16_t baseline) { baseline_ = baseline; }
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void set_humidity_sensor(sensor::Sensor *humidity) { humidity_sensor_ = humidity; }
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void set_temperature_sensor(sensor::Sensor *temperature) { temperature_sensor_ = temperature; }
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void setup() override;
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void update() override;
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void dump_config() override;
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float get_setup_priority() const override { return setup_priority::DATA; }
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protected:
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bool write_command_(uint16_t command);
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bool read_data_(uint16_t *data, uint8_t len);
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void send_env_data_();
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void read_iaq_baseline_();
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bool is_sensor_baseline_reliable_();
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void write_iaq_baseline_(uint16_t baseline);
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uint8_t sht_crc_(uint8_t data1, uint8_t data2);
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uint64_t serial_number_;
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uint16_t featureset_;
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long required_warm_up_time_;
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enum ErrorCode {
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COMMUNICATION_FAILED,
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MEASUREMENT_INIT_FAILED,
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INVALID_ID,
|
||||
UNSUPPORTED_ID,
|
||||
UNKNOWN
|
||||
} error_code_{UNKNOWN};
|
||||
|
||||
sensor::Sensor *eco2_sensor_{nullptr};
|
||||
sensor::Sensor *tvoc_sensor_{nullptr};
|
||||
uint16_t baseline_{0x0000};
|
||||
/// Input sensor for humidity and temperature compensation.
|
||||
sensor::Sensor *humidity_sensor_{nullptr};
|
||||
sensor::Sensor *temperature_sensor_{nullptr};
|
||||
};
|
||||
|
||||
} // namespace sgp30
|
||||
} // namespace esphome
|
|
@ -531,6 +531,15 @@ sensor:
|
|||
name: "Living Room Humidity 9"
|
||||
address: 0x61
|
||||
update_interval: 15s
|
||||
- platform: sgp30
|
||||
eco2:
|
||||
name: "Workshop eCO2"
|
||||
accuracy_decimals: 1
|
||||
tvoc:
|
||||
name: "Workshop TVOC"
|
||||
accuracy_decimals: 1
|
||||
address: 0x58
|
||||
update_interval: 5s
|
||||
- platform: template
|
||||
name: "Template Sensor"
|
||||
id: template_sensor
|
||||
|
|
Loading…
Reference in a new issue