88 lines
2.9 KiB
C
88 lines
2.9 KiB
C
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#pragma once
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#include "esp_err.h"
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#include "esp_log.h"
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#ifdef CONFIG_IDF_TARGET_ESP8266
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#include "driver/i2c.h"
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#else
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#include "driver/i2c_master.h"
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#endif
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#define ZH_HTU_INIT_CONFIG_DEFAULT() \
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{ \
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.i2c_port = 0, \
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.resolution = HTU_RES_12_14 \
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}
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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typedef enum
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{
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HTU_RES_8_12 = 0x1, // 8 bit humidity resolution / 12 bit temperature resolution.
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HTU_RES_10_13 = 0x40, // 10 bit humidity resolution / 13 bit temperature resolution.
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HTU_RES_11_11 = 0x41, // 11 bit humidity resolution / 11 bit temperature resolution.
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HTU_RES_12_14 = 0x0 // 12 bit humidity resolution / 14 bit temperature resolution.
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} zh_htu_resolution_t;
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typedef struct // Structure for initial initialization of AHT sensor.
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{
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bool i2c_port; // I2C port.
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zh_htu_resolution_t resolution; // Sensor measurement resolution.
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#ifndef CONFIG_IDF_TARGET_ESP8266
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i2c_master_bus_handle_t i2c_handle; // Unique I2C bus handle.
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#endif
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} zh_htu_init_config_t;
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/**
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* @brief Initialize HTU sensor.
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*
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* @param[in] config Pointer to HTU initialized configuration structure. Can point to a temporary variable.
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*
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* @attention I2C driver must be initialized first.
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*
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* @note Before initialize the sensor recommend initialize zh_htu_init_config_t structure with default values.
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*
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* @code zh_htu_init_config_t config = ZH_HTU_INIT_CONFIG_DEFAULT() @endcode
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*
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* @return
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* - ESP_OK if initialization was success
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* - ESP_ERR_INVALID_ARG if parameter error
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* - ESP_ERR_NOT_FOUND if sensor not connected or not responded
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* - ESP_ERR_INVALID_RESPONSE if I2C driver error
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*/
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esp_err_t zh_htu_init(const zh_htu_init_config_t *config);
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/**
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* @brief Read HTU sensor.
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*
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* @param[out] humidity Pointer for HTU sensor reading data of humidity.
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* @param[out] temperature Pointer for HTU sensor reading data of temperature.
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*
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* @return
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* - ESP_OK if read was success
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* - ESP_ERR_INVALID_ARG if parameter error
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* - ESP_ERR_NOT_FOUND if sensor is not initialized
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* - ESP_ERR_INVALID_CRC if check CRC is fail
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* - ESP_ERR_INVALID_RESPONSE if I2C driver error
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* - ESP_ERR_TIMEOUT if sensor has not responded
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*/
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esp_err_t zh_htu_read(float *humidity, float *temperature);
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/**
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* @brief Reset HTU sensor.
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*
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* @return
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* - ESP_OK if reset was success
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* - ESP_ERR_NOT_FOUND if sensor is not initialized
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* - ESP_ERR_INVALID_RESPONSE if I2C driver error
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*/
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esp_err_t zh_htu_reset(void);
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#ifdef __cplusplus
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}
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#endif
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