Forked from DHT-source.
This is an ESP32 cpp (esp-idf) library for the DHT22 low cost temperature/humidity sensors.
Jun 2017: Ricardo Timmermann, new for DHT22.
This lib is the cpp version of one in the DHT22 repo.
Running DHT22
Create folder components in main project directory. In this folder run:
$ git clone https://github.com/gosouth/DHT22-cpp.git
$ git clone https://github.com/lombo-cmyk/EspEthW5500Modbus.git
USE
See main.cpp
#define DHT_PIN GPIO_NUM_23
extern "C" {
void app_main();
}
void DHT_task(void *pvParameter)
{
DHT(DHT_PIN);
printf( "Starting DHT Task\n\n");
while(true) {
printf("=== Reading DHT ===\n" );
int ret = dht.ReadDHT();
dht.ErrorHandler(ret);
printf( "Hum %.1f\n", dht.GetHumidity() );
printf( "Tmp %.1f\n", dht.GetTemperature() );
// -- wait at least 2 sec before reading again ------------
// The interval of whole process must be beyond 2 seconds !!
vTaskDelay( 3000 / portTICK_RATE_MS );
}
}
void app_main()
{
nvs_flash_init();
vTaskDelay( 1000 / portTICK_RATE_MS );
xTaskCreate( &DHT_task, "DHT_task", 2048, NULL, 5, NULL );
}