Bluetooth и QLocalSocket

apt-get install libqtm-12-dev

Qt += core \
     qui \
     network

CONFIG += mobility
MOBILITY += location connectivity
LIBS += -lbluetooth -L/opt/usr/lib -lrxsupport

int Bluetooth::findSerialPort(const bdaddr_t* addr, const uuid_t* uuid) {
   uint32_t range = 0x0000FFFF;
   sdp_session_t* session = sdp_connect(BDADDR_ANY, addr, SDP_RETRY_IF_BUSY);
   if (session != NULL) {
     uuid_t identifier;

     if (uuid == NULL) {
       sdp_uuid16_create(&identifier, RFCOMM_UUID);
       uuid = &identifier;
     }

     sdp_list_t* search_list = sdp_list_append(NULL, (uuid_t*)uuid);
     sdp_list_t* attribute_list = sdp_list_append(NULL, &range);
     sdp_list_t* response_list = NULL;

     int status = sdp_service_search_attr_req(
       session, search_list, SDP_ATTR_REQ_RANGE, attribute_list, &response_list);
     if (status == 0) {
       sdp_list_t* proto_list = NULL;
       for (sdp_list_t* entry = response_list; entry != NULL;
         entry = entry->next) {
         sdp_record_t* record = (sdp_record_t*)entry->data;
         if (sdp_get_access_protos(record, &proto_list) == 0) {
           port = sdp_get_proto_port(proto_list, RFCOMM_UUID);
           sdp_list_free(proto_list, 0);
         }
         sdp_record_free(record);
       }
     }
     sdp_list_free(response_list, 0);
     sdp_list_free(search_list, 0);
     sdp_list_free(attribute_list, 0);
     sdp_close(session);
     return port;
   }
   return -1;
}

int Bluetooth::connectSerialPort(bdaddr_t remote, int channel) {
   struct sockaddr_rc endpoint;
   endpoint.rc_family = AF_BLUETOOTH;
   endpoint.rc_bdaddr = remote;
   endpoint.rc_channel = (uint8_t)channel;

   btHandle = ::socket(AF_BLUETOOTH, SOCK_STREAM, BTPROTO_RFCOMM);
   if (btHandle < 0) {
     return -1;
   }
   int status = ::connect(btHandle, (struct sockaddr*)&endpoint, sizeof(endpoint));
   if (status < 0) {
     return -1;
   }
   return 0;
}

bdaddr_t address;
int port;
str2ba("00:01:02:03:04:05", &address); // Здесь у меня для простоты был введен адрес нужного мне устройства
port = findSerialPort(&address, NULL);
if (connectSerialPort(address, port)) {
 ...
}