73 lines
2.1 KiB
C
73 lines
2.1 KiB
C
#pragma once
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#include "stdint.h"
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#include "stdio.h"
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#include "esp_err.h"
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#include "esp_log.h"
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#include "driver/gpio.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_DHT_INIT_CONFIG_DEFAULT() \
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{ \
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.sensor_pin = 0xFF, \
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.i2c_port = 0 \
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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 struct
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{
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uint8_t sensor_pin; // Sensor GPIO connection.
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bool i2c_port; // I2C port.
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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_dht_init_config_t;
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/**
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* @brief Initialize DHT sensor.
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*
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* @param[in] config Pointer to DHT initialized configuration structure. Can point to a temporary variable.
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*
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* @attention I2C driver must be initialized first (for I2C connection only).
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*
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* @note Before initialize the sensor recommend initialize zh_dht_init_config_t structure with default values.
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*
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* @code zh_dht_init_config_t config = ZH_DHT_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 (for I2C connection only)
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*/
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esp_err_t zh_dht_init(const zh_dht_init_config_t *config);
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/**
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* @brief Read DHT sensor.
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*
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* @param[out] humidity Pointer for DHT sensor reading data of humidity.
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* @param[out] temperature Pointer for DHT 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 DHT is not initialized
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* - ESP_ERR_INVALID_RESPONSE if the bus is busy
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* - ESP_ERR_INVALID_STATE if I2C driver not installed or not in master mode
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* - ESP_ERR_TIMEOUT if operation timeout
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* - ESP_ERR_INVALID_CRC if check CRC is fail
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*/
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esp_err_t zh_dht_read(float *humidity, float *temperature);
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#ifdef __cplusplus
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}
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#endif |