// Rapsberry Pi: Bluetooth and HC-06 - Febbraio 2017
// Copyright (c) 2017, Vincenzo Villa (https://www.vincenzov.net)
// Creative Commons | Attribuzione-Condividi allo stesso modo 4.0 Unported.
// Creative Commons | Attribution-Share Alike 3.0 Unported
// https://www.vincenzov.net/taccuino/RaspberryPI/bluethoot.htm


#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>



#include <wiringPi.h>
#include <wiringSerial.h>

#define LEN 1000  // Read up to LEN char from BT
#define COM "/dev/rfcomm0"

int main() {
    int fd;
    int count;

    if ((fd = serialOpen(COM, 9600)) < 0) {
        fprintf(stderr, "Unable to open serial device: %s\n", strerror(errno));
        return 1;
    }

    if (wiringPiSetup() == -1) {
        fprintf(stdout, "Unable to start wiringPi: %s\n", strerror(errno));
        return 1;
    }

    for (count = 0; count < LEN; count++) {
        printf("%c", serialGetchar(fd));
        fflush(stdout);
    }

    serialPutchar(fd, 'A');
    usleep(200000);
    serialPutchar(fd, 'B');
    usleep(200000);
    serialPutchar(fd, 'C');
    usleep(200000);
    serialPutchar(fd, 'D');
    usleep(200000);
    serialPutchar(fd, 'E');
    usleep(200000);
    serialPutchar(fd, 'F');
    usleep(200000);
    serialPutchar(fd, 'f');
    usleep(200000);
    serialPutchar(fd, 'e');
    usleep(200000);
    serialPutchar(fd, 'd');
    usleep(200000);
    serialPutchar(fd, 'c');
    usleep(200000);
    serialPutchar(fd, 'b');
    usleep(200000);
    serialPutchar(fd, 'a');
    usleep(200000);

    printf("\n");
    return 0;
}