#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>

#include "htu21d.h"

int main()
{
        char filename[20];
        snprintf(filename, 19, "/dev/i2c-%d", 2);
        int fd = open(filename, O_RDWR);
        if (0 > fd)
        {
                fprintf(stderr, "ERROR: Unable to access HTU21D sensor module: %s\n", strerror (errno));
                exit(-1);
        }

        // Retrieve temperature and humidity
        double temperature = 0;
        double humidity = 0;
        if ( (0 > getHumidity(fd, &humidity)) || (0 > getTemperature(fd, &temperature)) )
        {
                fprintf(stderr, "ERROR: HTU21D sensor module not found\n");
                exit(-1);
        }

        // Print temperature and humidity on the screen
        printf("{ ");
        printf("\"temperature\": %5.2f, ", temperature);
        printf("\"humidity\": %5.2f ", humidity);
        printf("}");
        //printf("HTU21D Sensor Module\n");
        //printf("%5.2fC\n", temperature);
        //printf("%5.2f%%rh\n", humidity);

        return 0;
}