Raspberry Pi で Bluetooth を使う (C++)

Raspberry Pi で C++ で Bluetooth を使うプログラムです。
次のページのサンプルの simplescan.c を改造しました。
bitsbyte/bluetooth-programming-in-c

simplescan.cpp

// -----------------------------------------------------------------------
/*
	simplescan.cpp

					May/25/2018
*/
// -----------------------------------------------------------------------
# include	<iostream>
# include	<fstream>

# include <stdlib.h>
# include <unistd.h>
# include <sys/socket.h>
# include <bluetooth/bluetooth.h>
# include <bluetooth/hci.h>
# include <bluetooth/hci_lib.h>

using namespace std;
// -----------------------------------------------------------------------
int main (int argc, char *argv[])
{
	cerr << "*** 開始 ***\n";

	char addr[19] = { 0 };
	char name[248] = { 0 };

	int dev_id = hci_get_route(NULL);
	int sock = hci_open_dev( dev_id );
	if (dev_id < 0 || sock < 0) {
	    perror("opening socket");
	    exit(1);
	}

	int len  = 8;
	int max_rsp = 255;
	int flags = IREQ_CACHE_FLUSH;
	inquiry_info *ii =  new inquiry_info[max_rsp * sizeof(inquiry_info)];
	
	int num_rsp = hci_inquiry(dev_id, len, max_rsp, NULL, &ii, flags);
	if( num_rsp < 0 ) perror("hci_inquiry");

	for (int it = 0; it < num_rsp; it++)
		{
		ba2str(&(ii + it)->bdaddr, addr);
		memset(name, 0, sizeof(name));
		if (hci_read_remote_name
			(sock, &(ii + it)->bdaddr, sizeof(name),name, 0) < 0)
			{
			strcpy(name, "[unknown]");
			}

		cout << addr << "\t";
		cout << name << "\n";
		}

	delete[] ii;
 
	close( sock );

	cerr << "*** 終了 ***\n";

	return 0;
}

// -----------------------------------------------------------------------

Makefile

simplescan: simplescan.cpp
	clang++ -o simplescan simplescan.cpp -lbluetooth
clean:
	rm -f simplescan

実行結果

$ ./simplescan 
*** 開始 ***
8C:25:08:41:EC:32       mishima
*** 終了 ***

Bluetooth の機器が周辺にあるか確認する方法

$ hcitool scan
Scanning ...
        8C:25:08:41:EC:32       mishima