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https://github.com/esphome/esphome.git
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126 lines
3.6 KiB
C++
126 lines
3.6 KiB
C++
#include "shtcx.h"
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#include "esphome/core/log.h"
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#include "esphome/core/hal.h"
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namespace esphome {
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namespace shtcx {
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static const char *const TAG = "shtcx";
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static const uint16_t SHTCX_COMMAND_SLEEP = 0xB098;
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static const uint16_t SHTCX_COMMAND_WAKEUP = 0x3517;
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static const uint16_t SHTCX_COMMAND_READ_ID_REGISTER = 0xEFC8;
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static const uint16_t SHTCX_COMMAND_SOFT_RESET = 0x805D;
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static const uint16_t SHTCX_COMMAND_POLLING_H = 0x7866;
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inline const char *to_string(SHTCXType type) {
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switch (type) {
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case SHTCX_TYPE_SHTC3:
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return "SHTC3";
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case SHTCX_TYPE_SHTC1:
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return "SHTC1";
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default:
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return "[Unknown model]";
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}
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}
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void SHTCXComponent::setup() {
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ESP_LOGCONFIG(TAG, "Setting up SHTCx...");
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this->wake_up();
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this->soft_reset();
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if (!this->write_command(SHTCX_COMMAND_READ_ID_REGISTER)) {
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ESP_LOGE(TAG, "Error requesting Device ID");
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this->mark_failed();
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return;
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}
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uint16_t device_id_register;
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if (!this->read_data(&device_id_register, 1)) {
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ESP_LOGE(TAG, "Error reading Device ID");
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this->mark_failed();
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return;
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}
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this->sensor_id_ = device_id_register;
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if ((device_id_register & 0x3F) == 0x07) {
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if (device_id_register & 0x800) {
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this->type_ = SHTCX_TYPE_SHTC3;
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} else {
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this->type_ = SHTCX_TYPE_SHTC1;
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}
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} else {
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this->type_ = SHTCX_TYPE_UNKNOWN;
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}
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ESP_LOGCONFIG(TAG, " Device identified: %s (%04x)", to_string(this->type_), device_id_register);
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}
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void SHTCXComponent::dump_config() {
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ESP_LOGCONFIG(TAG, "SHTCx:");
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ESP_LOGCONFIG(TAG, " Model: %s (%04x)", to_string(this->type_), this->sensor_id_);
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LOG_I2C_DEVICE(this);
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if (this->is_failed()) {
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ESP_LOGE(TAG, "Communication with SHTCx failed!");
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}
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LOG_UPDATE_INTERVAL(this);
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LOG_SENSOR(" ", "Temperature", this->temperature_sensor_);
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LOG_SENSOR(" ", "Humidity", this->humidity_sensor_);
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}
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float SHTCXComponent::get_setup_priority() const { return setup_priority::DATA; }
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void SHTCXComponent::update() {
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if (this->status_has_warning()) {
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ESP_LOGW(TAG, "Retrying to reconnect the sensor.");
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this->soft_reset();
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}
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if (this->type_ != SHTCX_TYPE_SHTC1) {
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this->wake_up();
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}
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if (!this->write_command(SHTCX_COMMAND_POLLING_H)) {
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ESP_LOGE(TAG, "sensor polling failed");
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if (this->temperature_sensor_ != nullptr)
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this->temperature_sensor_->publish_state(NAN);
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if (this->humidity_sensor_ != nullptr)
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this->humidity_sensor_->publish_state(NAN);
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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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float temperature = NAN;
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float humidity = NAN;
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uint16_t raw_data[2];
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if (!this->read_data(raw_data, 2)) {
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ESP_LOGE(TAG, "sensor read failed");
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this->status_set_warning();
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} else {
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temperature = 175.0f * float(raw_data[0]) / 65536.0f - 45.0f;
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humidity = 100.0f * float(raw_data[1]) / 65536.0f;
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ESP_LOGD(TAG, "Got temperature=%.2f°C humidity=%.2f%%", temperature, humidity);
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}
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if (this->temperature_sensor_ != nullptr)
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this->temperature_sensor_->publish_state(temperature);
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if (this->humidity_sensor_ != nullptr)
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this->humidity_sensor_->publish_state(humidity);
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this->status_clear_warning();
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if (this->type_ != SHTCX_TYPE_SHTC1) {
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this->sleep();
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}
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});
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}
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void SHTCXComponent::soft_reset() {
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this->write_command(SHTCX_COMMAND_SOFT_RESET);
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delayMicroseconds(200);
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}
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void SHTCXComponent::sleep() { this->write_command(SHTCX_COMMAND_SLEEP); }
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void SHTCXComponent::wake_up() {
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this->write_command(SHTCX_COMMAND_WAKEUP);
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delayMicroseconds(200);
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}
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} // namespace shtcx
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} // namespace esphome
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