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Added DHT library to extras and sample code to examples

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This commit is contained in:
jsuiker 2016-04-20 22:03:18 +00:00
parent 2badeed523
commit 99eba80c4d
5 changed files with 221 additions and 0 deletions
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4
examples/dht_sensor/Makefile Normal file
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PROGRAM=dht_sensor
EXTRA_COMPONENTS = extras/dht
include ../../common.mk

46
examples/dht_sensor/dht_sensor.c Normal file
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/*
*
* This sample code is in the public domain.
*/
#include "espressif/esp_common.h"
#include "esp/uart.h"
#include "FreeRTOS.h"
#include "task.h"
#include "dht.h"
#include "esp8266.h"
/* An example using the ubiquitous DHT** humidity sensors
* to read and print a new temperature and humidity measurement
* from a sensor attached to GPIO pin 4.
*/
int const dht_gpio = 4;
void dhtMeasurementTask(void *pvParameters)
{
int8_t temperature = 0;
int8_t humidity = 0;
// DHT sensors that come mounted on a PCB generally have
// pull-up resistors on the data pin. It is recommended
// to provide an external pull-up resistor otherwise...
gpio_set_pullup(dht_gpio, false, false);
while(1) {
if (dht_fetch_data(dht_gpio, &humidity, &temperature)) {
printf("Humidity: %i%% Temp: %iC\n", humidity, temperature);
} else {
printf("Could not read data from sensor...");
}
// Three second delay...
vTaskDelay(3000 / portTICK_RATE_MS);
}
}
void user_init(void)
{
uart_set_baud(0, 115200);
xTaskCreate(dhtMeasurementTask, (signed char *)"dhtMeasurementTask", 256, NULL, 2, NULL);
}