Initial commit

firmware/main/include/dht.h

@@ -0,0 +1,77 @@
+#pragma once
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <driver/gpio.h>
+#include <esp_err.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * Sensor type
+ */
+typedef enum
+{
+    DHT_TYPE_DHT11 = 0, //!< DHT11
+    DHT_TYPE_DHT22,     //!< DHT22
+    DHT_TYPE_SI7021     //!< Itead SI7021
+} dht_sensor_type_t;
+
+
+/**
+ * Initialize Config dht pin to be read on specified pin
+ * If you are usingPull up resistor
+ */
+
+/**
+  * @brief  Initialize Config dht pin to be read on specified pin
+  *
+  * @param  pin GPIO number of dht sensor
+  * 
+  * @return
+  *     - ESP_OK Success
+  *     - ESP_ERR_INVALID_ARG Parameter error
+  *     - ESP_FAIL Init error
+  */
+esp_err_t dht_init(gpio_num_t pin, bool pull_up);
+
+/**
+  * @brief  Read data from sensor on specified pin. dht_init must be called before reading it.
+  *         Humidity and temperature is returned as integers.
+  *         For example: humidity=625 is 62.5 %
+  *                      temperature=244 is 24.4 degrees Celsius
+  * 
+  * @param  sensor_type
+  * @param  pin GPIO number of dht sensor
+  * @param  humidity output humidity
+  * @param  temperature output temperature
+  * 
+  * @return
+  *     - ESP_OK Success
+  *     - ESP_FAIL Init error
+  */
+esp_err_t dht_read_data(dht_sensor_type_t sensor_type, gpio_num_t pin, int16_t *humidity, int16_t *temperature);
+
+
+/**
+  * @brief  Float version of dht_read_data. Read data from sensor on specified pin. dht_init must be called before reading it.
+  *         Humidity and temperature is returned as float.
+  *         For example: humidity=62.5 is 62.5 %
+  *                      temperature=24.4 is 24.4 degrees Celsius
+  * 
+  * @param  sensor_type
+  * @param  pin GPIO number of dht sensor
+  * @param  humidity output humidity
+  * @param  temperature output temperature
+  * 
+  * @return
+  *     - ESP_OK Success
+  *     - ESP_FAIL Init error
+  */
+esp_err_t dht_read_float_data(dht_sensor_type_t sensor_type, gpio_num_t pin, float *humidity, float *temperature);
+
+#ifdef __cplusplus
+}
+#endif