hi folks,
I've been trolling the net looking for something to show me either as a
complete app or as a howto so I can get a C/C++ program to download data via
BT SPP (the device is a OPTICON 2002 barcode scanner).
am happy for it to dump the barcodes to a file or have it redirected via a
pipe so I can then read in the barcodes and once validated put them into a DB.
I've found 1 app that does what I want via a USB connection and am thinkign I
should be able to get a rfcomm setup and point the program to the port and
have the same action happen, But as yet all attempts have failed.
from all my reading this is the sequence needed to get a rfcomm up and
running.
from a terminal....
sudo rfcomm connect/listen/watch/bind 0 <device mac address> channel
Found that for me thigns don't happen without using sudo.
The I run my c app pulled from the web (which fails might i say).
I type cs1504 /dev/rfcomm0 (using /dev/USB0 works by the way).
I've found references to linking the rfcomm to a ttyS port and this has failed
also.
above mentioned app is a C++ app from https://github.com/dudochkin-
victor/cs1504
also got from a seperate website this tutorial program...
gcc#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/socket.h>
#include <bluetooth/bluetooth.h>
#include <bluetooth/hci.h>
#include <bluetooth/hci_lib.h>
int main(int argc, char **argv)
{
inquiry_info *ii = NULL;
int max_rsp, num_rsp;
int dev_id, sock, len, flags;
int i;
char addr[19] = { 0 };
char name[248] = { 0 };
dev_id = hci_get_route(NULL);
sock = hci_open_dev( dev_id );
if (dev_id < 0 || sock < 0) {
perror("opening socket");
exit(1);
}
len = 8;
max_rsp = 255;
flags = IREQ_CACHE_FLUSH;
ii = (inquiry_info*)malloc(max_rsp * sizeof(inquiry_info));
num_rsp = hci_inquiry(dev_id, len, max_rsp, NULL, &ii, flags);
if( num_rsp < 0 ) perror("hci_inquiry");
for (i = 0; i < num_rsp; i++) {
ba2str(&(ii+i)->bdaddr, addr);
memset(name, 0, sizeof(name));
if (hci_read_remote_name(sock, &(ii+i)->bdaddr, sizeof(name),
name, 0) < 0)
strcpy(name, "[unknown]");
printf("%s %s\n", addr, name);
}
free( ii );
close( sock );
return 0;
}
this app was an attempt for me to _TRY_ and figure out how i could actually
connect to the BT device via SPP.
I am sure I'm not understanding something very simple and what adds to the
frustration is that I'm not a C/C++ programmer although I can get he gist of
what is happening in places.
if anyone could help me i'd appreciate it.
Dave.
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