#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>

const 

int main(){

    int fd;
    char buf[32];
    size_t count = 1;
    ssize_t ret_size;

    if((fd = open("/dev/adxl345", O_RDWR)) == -1){
        printf("/dev/adxl345 opening failed\n");
        return(0);
    }
    else{
        if((ret_size = read(fd, &buf, count)) < 0){
            printf("Error while reading the device file.\n");
            return(1);
        }
        else{
            printf("Data read successfully. Asked %i byte, received %i byte\n",count, ret_size);
            printf("Data:\n");
            for(int i = 0; i<ret_size; i++){
                printf("%i",buf[i]);
            }
        }
    }
    return(0);
}