dht22
2.0.0.0
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API for configuring and manipulating DHT22 Click driver. More...
Modules | |
DHT22 MikroBUS Map | |
MikroBUS pin mapping of DHT22 Click driver. | |
DHT22 response status. | |
Settings for response status of DHT22 Click driver. | |
Functions | |
void | dht22_cfg_setup (dht22_cfg_t *cfg) |
DHT22 configuration object setup function. More... | |
err_t | dht22_init (dht22_t *ctx, dht22_cfg_t *cfg) |
DHT22 initialization function. More... | |
err_t | dht22_start_signal (dht22_t *ctx) |
DHT22 sends start signal to the sensor function. More... | |
err_t | dht22_check_sensor_response (dht22_t *ctx) |
DHT22 release the bus to wait the sensor response signal function. More... | |
err_t | dht22_get_sensor_data (dht22_t *ctx, uint16_t *hum_data, uint16_t *temp_data) |
DHT22 reading data from the sensor function. More... | |
err_t | dht22_get_measurement_data (dht22_t *ctx, float *humidity, float *temperature) |
DHT22 get measurement data from the sensor function. More... | |
err_t | dht22_init_sda_input (dht22_t *ctx) |
DHT22 init SDA data pin as input function. More... | |
err_t | dht22_init_sda_output (dht22_t *ctx) |
DHT22 init SDA data pin as output function. More... | |
API for configuring and manipulating DHT22 Click driver.
void dht22_cfg_setup | ( | dht22_cfg_t * | cfg | ) |
DHT22 configuration object setup function.
This function initializes click configuration structure to initial values.
[out] | cfg | : Click configuration structure. See dht22_cfg_t object definition for detailed explanation. |
err_t dht22_check_sensor_response | ( | dht22_t * | ctx | ) |
DHT22 release the bus to wait the sensor response signal function.
This function release the bus to wait the sensor response signal from the sensor AM2302 on the DHT22 Click.
[in] | ctx | : Click context object. See dht22_t object definition for detailed explanation. |
0
- The sensor responded and is ready to read data, -1
- ERROR, Sensor not responding. err_t dht22_get_measurement_data | ( | dht22_t * | ctx, |
float * | humidity, | ||
float * | temperature | ||
) |
DHT22 get measurement data from the sensor function.
This function reading and calculate measurement data from the sensor AM2302 on the DHT22 Click.
[in] | ctx | : Click context object. See dht22_t object definition for detailed explanation. |
[out] | humidity | Percentage of relative humidity [% RH]. |
[out] | temperature | Temperature value in degrees Celsius [degree Celsius]. |
0
- Success, -1
- Error. See #err_t definition for detailed explanation. err_t dht22_get_sensor_data | ( | dht22_t * | ctx, |
uint16_t * | hum_data, | ||
uint16_t * | temp_data | ||
) |
DHT22 reading data from the sensor function.
This function reading data from the sensor AM2302 on the DHT22 Click.
[in] | ctx | : Click context object. See dht22_t object definition for detailed explanation. |
[out] | hum_data | 16-bit read humidity data value from the sensor. |
[out] | temp_data | 16-bit read temperature data value from the sensor. |
0
- Success, -1
- Error. See #err_t definition for detailed explanation. err_t dht22_init | ( | dht22_t * | ctx, |
dht22_cfg_t * | cfg | ||
) |
DHT22 initialization function.
This function initializes all necessary pins and peripherals used for this click board.
[out] | ctx | : Click context object. See dht22_t object definition for detailed explanation. |
[in] | cfg | : Click configuration structure. See dht22_cfg_t object definition for detailed explanation. |
0
- Success, -1
- Error. See #err_t definition for detailed explanation. err_t dht22_init_sda_input | ( | dht22_t * | ctx | ) |
DHT22 init SDA data pin as input function.
This functioninitializes SDA data pin as input of the sensor AM2302 on the DHT22 Click.
[in] | ctx | : Click context object. See dht22_t object definition for detailed explanation. |
0
- Success, -1
- Error. See #err_t definition for detailed explanation. err_t dht22_init_sda_output | ( | dht22_t * | ctx | ) |
DHT22 init SDA data pin as output function.
This functioninitializes SDA data pin as output of the sensor AM2302 on the DHT22 Click.
[in] | ctx | : Click context object. See dht22_t object definition for detailed explanation. |
0
- Success, -1
- Error. See #err_t definition for detailed explanation. err_t dht22_start_signal | ( | dht22_t * | ctx | ) |
DHT22 sends start signal to the sensor function.
This function sends the start signal to the tempemperature and humidity sensor AM2302 on DHT22 click board.
[in] | ctx | : Click context object. See dht22_t object definition for detailed explanation. |