main.c
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/*
* Copyright (C) 2015 Ludwig Knüpfer, Christian Mehlis
* 2016-2017 Freie Universität Berlin
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
* directory for more details.
*/
/**
* @ingroup tests
* @{
*
* @file
* @brief Test application for the dht humidity and temperature sensor driver
*
* @author Ludwig Knüpfer <ludwig.knuepfer@fu-berlin.de>
* @author Christian Mehlis <mehlis@inf.fu-berlin.de>
* @author Hauke Petersen <hauke.petersen@fu-berlin.de>
*
* @}
*/
#include <stdio.h>
#include "xtimer.h"
#include "timex.h"
#include "fmt.h"
#include "dht.h"
#include "dht_params.h"
#define DELAY (2 * US_PER_SEC)
int main(void)
{
dht_t dev;
int16_t temp, hum;
char temp_s[10];
char hum_s[10];
puts("DHT temperature and humidity sensor test application\n");
/* initialize first configured sensor */
printf("Initializing DHT sensor...\t");
if (dht_init(&dev, &dht_params[0]) == DHT_OK) {
puts("[OK]\n");
}
else {
puts("[Failed]");
return 1;
}
/* periodically read temp and humidity values */
while (1) {
if (dht_read(&dev, &temp, &hum) != DHT_OK) {
puts("Error reading values");
continue;
}
size_t n = fmt_s16_dfp(temp_s, temp, 1);
temp_s[n] = '\0';
n = fmt_s16_dfp(hum_s, hum, 1);
hum_s[n] = '\0';
printf("DHT values - temp: %s°C - relative humidity: %s%%\n",
temp_s, hum_s);
xtimer_usleep(DELAY);
}
return 0;
}