107 lines
2.9 KiB
C++
107 lines
2.9 KiB
C++
#include "sht4x.h"
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#include "esphome/core/log.h"
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namespace esphome {
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namespace sht4x {
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static const char *const TAG = "sht4x";
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static const uint8_t MEASURECOMMANDS[] = {0xFD, 0xF6, 0xE0};
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void SHT4XComponent::start_heater_() {
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uint8_t cmd[] = {MEASURECOMMANDS[this->heater_command_]};
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ESP_LOGD(TAG, "Heater turning on");
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if (this->write(cmd, 1) != i2c::ERROR_OK) {
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this->status_set_error("Failed to turn on heater");
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}
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}
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void SHT4XComponent::setup() {
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ESP_LOGCONFIG(TAG, "Running setup");
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auto err = this->write(nullptr, 0);
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if (err != i2c::ERROR_OK) {
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this->mark_failed();
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return;
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}
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if (std::isfinite(this->duty_cycle_) && this->duty_cycle_ > 0.0f) {
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uint32_t heater_interval = static_cast<uint32_t>(static_cast<uint16_t>(this->heater_time_) / this->duty_cycle_);
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ESP_LOGD(TAG, "Heater interval: %" PRIu32, heater_interval);
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if (this->heater_power_ == SHT4X_HEATERPOWER_HIGH) {
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if (this->heater_time_ == SHT4X_HEATERTIME_LONG) {
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this->heater_command_ = 0x39;
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} else {
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this->heater_command_ = 0x32;
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}
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} else if (this->heater_power_ == SHT4X_HEATERPOWER_MED) {
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if (this->heater_time_ == SHT4X_HEATERTIME_LONG) {
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this->heater_command_ = 0x2F;
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} else {
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this->heater_command_ = 0x24;
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}
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} else {
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if (this->heater_time_ == SHT4X_HEATERTIME_LONG) {
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this->heater_command_ = 0x1E;
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} else {
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this->heater_command_ = 0x15;
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}
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}
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ESP_LOGD(TAG, "Heater command: %x", this->heater_command_);
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this->set_interval(heater_interval, std::bind(&SHT4XComponent::start_heater_, this));
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}
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}
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void SHT4XComponent::dump_config() {
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ESP_LOGCONFIG(TAG, "SHT4x:");
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LOG_I2C_DEVICE(this);
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if (this->is_failed()) {
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ESP_LOGE(TAG, ESP_LOG_MSG_COMM_FAIL);
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}
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}
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void SHT4XComponent::update() {
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// Send command
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if (!this->write_command(MEASURECOMMANDS[this->precision_])) {
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// Warning will be printed only if warning status is not set yet
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this->status_set_warning("Failed to send measurement command");
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return;
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}
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this->set_timeout(10, [this]() {
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uint16_t buffer[2];
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// Read measurement
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if (!this->read_data(buffer, 2)) {
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// Using ESP_LOGW to force the warning to be printed
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ESP_LOGW(TAG, "Sensor read failed");
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this->status_set_warning();
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return;
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}
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this->status_clear_warning();
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// Evaluate and publish measurements
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if (this->temp_sensor_ != nullptr) {
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// Temp is contained in the first result word
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float sensor_value_temp = buffer[0];
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float temp = -45 + 175 * sensor_value_temp / 65535;
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this->temp_sensor_->publish_state(temp);
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}
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if (this->humidity_sensor_ != nullptr) {
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// Relative humidity is in the second result word
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float sensor_value_rh = buffer[1];
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float rh = -6 + 125 * sensor_value_rh / 65535;
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this->humidity_sensor_->publish_state(rh);
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}
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});
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}
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} // namespace sht4x
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} // namespace esphome
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