dhtserver/src/dht/linux/libdht.c

#include "libdht.h"
#include <stdio.h>
#include <unistd.h>
#include <pi_2_dht_read.h>

int getdhtstring(int PIN, char* string)
{
    float humid;
    float temp;
    while (1) {
        if (pi_2_dht_read(DHT22, PIN, &humid, &temp) == DHT_SUCCESS) {
            sprintf(string, "{\"humidity\": %.1f, \"temp\": %.1f}", humid, temp);
            break;
        }
    }
    return 0;
}