// Update is called once per frame
void Update()
{
if (_timeout > 0f)
{
_timeout -= Time.deltaTime;
if (_timeout <= 0f)
{
_timeout = 0f;
switch (_state)
{
case States.None:
break;
case States.Scan:
StatusMessage = "Scanning for " + DeviceName;
BluetoothLEHardwareInterface.ScanForPeripheralsWithServices(null, (address, name) =>
{
// if your device does not advertise the rssi and manufacturer specific data
// then you must use this callback because the next callback only gets called
// if you have manufacturer specific data
if (!_rssiOnly)
{
if (name.Contains(DeviceName))
{
StatusMessage = "Found " + name;
BluetoothLEHardwareInterface.StopScan();
// found a device with the name we want
// this example does not deal with finding more than one
_deviceAddress = address;
SetState(States.Connect, 0.5f);
}
}
}, (address, name, rssi, bytes) =>
{
// use this one if the device responses with manufacturer specific data and the rssi
if (name.Contains(DeviceName))
{
StatusMessage = "Found " + name;
if (_rssiOnly)
{
_rssi = rssi;
}
else
{
BluetoothLEHardwareInterface.StopScan();
// found a device with the name we want
// this example does not deal with finding more than one
_deviceAddress = address;
SetState(States.Connect, 0.5f);
}
}
}, _rssiOnly); // this last setting allows RFduino to send RSSI without having manufacturer data
if (_rssiOnly)
{
SetState(States.ScanRSSI, 0.5f);
}
break;
case States.ScanRSSI:
break;
case States.Connect:
StatusMessage = "Connecting...";
// set these flags
_foundButtonUUID = false;
_foundLedUUID = false;
// note that the first parameter is the address, not the name. I have not fixed this because
// of backwards compatiblity.
// also note that I am note using the first 2 callbacks. If you are not looking for specific characteristics you can use one of
// the first 2, but keep in mind that the device will enumerate everything and so you will want to have a timeout
// large enough that it will be finished enumerating before you try to subscribe or do any other operations.
BluetoothLEHardwareInterface.ConnectToPeripheral(_deviceAddress, null, null, (address, serviceUUID, characteristicUUID) =>
{
StatusMessage = "Connected...";
if (IsEqual(serviceUUID, ServiceUUID))
{
StatusMessage = "Found Service UUID";
_foundButtonUUID = _foundButtonUUID || IsEqual(characteristicUUID, ButtonUUID);
_foundLedUUID = _foundLedUUID || IsEqual(characteristicUUID, LedUUID);
// if we have found both characteristics that we are waiting for
// set the state. make sure there is enough timeout that if the
// device is still enumerating other characteristics it finishes
// before we try to subscribe
if (_foundButtonUUID && _foundLedUUID)
{
_connected = true;
SetState(States.RequestMTU, 2f);
}
}
});
break;
case States.RequestMTU:
StatusMessage = "Requesting MTU";
BluetoothLEHardwareInterface.RequestMtu(_deviceAddress, 185, (address, newMTU) =>
{
StatusMessage = "MTU set to " + newMTU.ToString();
SetState(States.Subscribe, 0.1f);
});
break;
case States.Subscribe:
StatusMessage = "Subscribing to characteristics...";
BluetoothLEHardwareInterface.SubscribeCharacteristicWithDeviceAddress(_deviceAddress, ServiceUUID, ButtonUUID, (notifyAddress, notifyCharacteristic) =>
{
StatusMessage = "Waiting for user action (1)...";
_state = States.None;
// read the initial state of the button
BluetoothLEHardwareInterface.ReadCharacteristic(_deviceAddress, ServiceUUID, ButtonUUID, (characteristic, bytes) =>
{
ProcessButton(bytes);
});
}, (address, characteristicUUID, bytes) =>
{
if (_state != States.None)
{
// some devices do not properly send the notification state change which calls
// the lambda just above this one so in those cases we don't have a great way to
// set the state other than waiting until we actually got some data back.
// The esp32 sends the notification above, but if yuor device doesn't you would have
// to send data like pressing the button on the esp32 as the sketch for this demo
// would then send data to trigger this.
StatusMessage = "Waiting for user action (2)...";
_state = States.None;
}
// we received some data from the device
ProcessButton(bytes);
});
break;
case States.Unsubscribe:
BluetoothLEHardwareInterface.UnSubscribeCharacteristic(_deviceAddress, ServiceUUID, ButtonUUID, null);
SetState(States.Disconnect, 4f);
break;
case States.Disconnect:
StatusMessage = "Commanded disconnect.";
if (_connected)
{
BluetoothLEHardwareInterface.DisconnectPeripheral(_deviceAddress, (address) =>
{
StatusMessage = "Device disconnected";
BluetoothLEHardwareInterface.DeInitialize(() =>
{
_connected = false;
_state = States.None;
});
});
}
else
{
BluetoothLEHardwareInterface.DeInitialize(() =>
{
_state = States.None;
});
}
break;
}
}
}
}
