void BluetoothHandler::receiveHrNotifications() {
qDebug() << "YYYY setting up to receive GATT notifications";
if (!bt_initialised) {
qDebug() << "Bluetooth libraries are not initialised!";
return;
}
HrDataContainer* hrdc = HrDataContainer::getInstance();
QString device_addr = hrdc->getCurrentDeviceAddr();
QString device_name = hrdc->getCurrentDeviceName();
hrdc->clearData();
bt_gatt_conn_parm_t conParm;
conParm.minConn = 0x30;
conParm.maxConn = 0x50;
conParm.latency = 0;
conParm.superTimeout = 50;
errno= 0;
if (bt_gatt_connect_service(device_addr.toAscii().constData(), HR_SERVICE_UUID, NULL, &conParm, this) < 0) {
qDebug() << "YYYY GATT connect service request failed: " + QString::number(errno) + " (" + QString(strerror(errno)) + ")";
} else {
qDebug() << "YYYY requested connection to HR service OK";
}
}
void BluetoothHandler::receiveHrNotifications() {
qDebug() << "YYYY setting up to receive GATT notifications";
if (!bt_initialised) {
qDebug() << "Bluetooth libraries are not initialised!";
return;
}
HrDataContainer* hrdc = HrDataContainer::getInstance();
QString device_addr = hrdc->getCurrentDeviceAddr();
QString device_name = hrdc->getCurrentDeviceName();
hrdc->clearData();
bt_gatt_conn_parm_t conParm;
conParm.minConn = 0x30;
conParm.maxConn = 0x50;
conParm.latency = 0;
conParm.superTimeout = 50;
errno= 0;
if (bt_gatt_connect_service(device_addr.toAscii().constData(), HR_SERVICE_UUID, NULL, &conParm, this) < 0) {
qDebug() << "YYYY GATT connect service request failed: " + QString::number(errno) + " (" + QString(strerror(errno)) + ")";
// there's a known issue where sometimes we get ERRNO=EBUSY (16) when this is not the case and we've connected to the service OK. So for now we ignore this errno value.
if (errno != 16) {
Utilities::alert("GATT connect service request failed: " + QString::number(errno));
}
} else {
qDebug() << "YYYY requested connection to HR service OK";
}
}
void BluetoothHandler::stopHrNotifications() {
errno= 0;
HrDataContainer* hrdc = HrDataContainer::getInstance();
QString device_addr = hrdc->getCurrentDeviceAddr();
if (bt_gatt_disconnect_service(device_addr.toAscii().constData(), HR_SERVICE_UUID) < 0) {
qDebug() << "YYYY GATT disconnect service request failed: " + QString::number(errno) + " (" + QString(strerror(errno)) + ")";
} else {
qDebug() << "YYYY disconnected from HR service OK";
}
}
void notifications_cb(int instance, uint16_t handle, const uint8_t *val, uint16_t len, void *userData) {
Q_UNUSED(instance)
Q_UNUSED(userData)
qDebug() << "YYYY notifications call back received";
if (NULL == val)
return;
HrDataContainer* hrdc = HrDataContainer::getInstance();
if (handle == hrdc->getHrValueHandle()) {
hrdc->addNotification(val,len);
hrdc->logMostRecentNotification();
}
}
void gatt_service_connected(const char *bdaddr, const char *service, int instance, int err, uint16_t connInt, uint16_t latency, uint16_t superTimeout, void *userData) {
Q_UNUSED(superTimeout)
Q_UNUSED(userData)
Q_UNUSED(latency)
Q_UNUSED(connInt)
Q_UNUSED(err)
qDebug() << "YYYY gatt_service_connected";
QString bdaddr_str = QString(bdaddr);
QString service_str = QString(service);
qDebug() << "YYYY registering for notifications";
errno = 0;
int rc = bt_gatt_reg_notifications(instance, notifications_cb);
qDebug() << "YYYY rc from bt_gatt_reg_notifications=" << rc;
if (rc != 0) {
qDebug() << "YYYY bt_gatt_reg_notifications errno=" << errno;
qDebug() << "YYYY bt_gatt_reg_notifications errno=" << strerror(errno);
} else {
qDebug() << "YYYY bt_gatt_reg_notifications was presumably OK";
}
bt_gatt_characteristic_t* heart_rate_measurement;
heart_rate_measurement = (bt_gatt_characteristic_t*) malloc(sizeof(bt_gatt_characteristic_t));
if (NULL == heart_rate_measurement) {
qDebug() << "YYYY GATT characteristics: Not enough memory";
bt_gatt_disconnect_instance(instance);
return;
}
int num_characteristics = bt_gatt_characteristics_count(instance);
if (num_characteristics > -1) {
qDebug() << QString("YYYY # characteristics: %1").arg(num_characteristics);
bt_gatt_characteristic_t *characteristicList;
characteristicList = (bt_gatt_characteristic_t*) malloc(num_characteristics * sizeof(bt_gatt_characteristic_t));
if (NULL == characteristicList) {
qDebug() << QString("YYYY GATT characteristics: Not enough memory");
bt_gatt_disconnect_instance(instance);
return;
}
/* BEGIN WORKAROUND - Temporary fix to address race condition */
int number = 0;
do {
number = bt_gatt_characteristics(instance, characteristicList, num_characteristics);
} while ((number == -1) && (errno== EBUSY));
int characteristicListSize = number;
HrDataContainer *hrdc = HrDataContainer::getInstance();
for (int i = 0; i < characteristicListSize; i++) {
qDebug() << "YYYY characteristic: uuid,handle,value_handle:" << characteristicList[i].uuid << "," << characteristicList[i].handle << "," << characteristicList[i].value_handle;
if (strcmp(characteristicList[i].uuid, HEART_RATE_MEASUREMENT) == 0) {
qDebug() << "YYYY heart rate characteristic available";
hrdc->setHrHandle(characteristicList[i].handle);
hrdc->setHrValueHandle(characteristicList[i].value_handle);
// enable=1 switches the notification on for the specified characteristic
qDebug() << "YYYY registering for heart_rate_measurement notification. uuid,handle,value_handle=" << characteristicList[i].uuid << "," << characteristicList[i].handle << "," << characteristicList[i].value_handle;
errno= 0;
rc = bt_gatt_enable_notify(instance, &characteristicList[i], 1);
if (rc != 0) {
qDebug() << "YYYY bt_gatt_enable_notify errno=" << errno;
qDebug() << "YYYY bt_gatt_enable_notify errno=" << strerror(errno);
} else {
qDebug() << "YYYY bt_gatt_enable_notify was presumably OK";
}
qDebug() << "YYYY rc from registering for heart_rate_measurement notification=" << rc;
} else {
qDebug() << "YYYY other characteristic: uuid,handle,value_handle=" << characteristicList[i].uuid << "," << characteristicList[i].handle << "," << characteristicList[i].value_handle;
}
}
if (characteristicList != NULL) {
free(characteristicList);
characteristicList = NULL;
}
/* END WORKAROUND */
qDebug() << "YYYY done registering for heart_rate_measurement notifications";
}
}