Error when start acquisition mode

[VadymKuriy]

Hello, when I do bitalino.start(new int[]{2}, 100) (status is connected) always have in BTHCommunication this exception:
java.io.IOException: bt socket closed, read return: -1
at android.bluetooth.BluetoothSocket.read(BluetoothSocket.java:733)
at android.bluetooth.BluetoothInputStream.read(BluetoothInputStream.java:96)
at java.io.InputStream.read(InputStream.java:162)
at info.plux.pluxapi.bitalino.bth.BTHCommunication$ConnectedThread.run(BTHCommunication.java:727)
Thx.

[GTelo]

Hi @VadymKuriy,

Are you using the API's sample app?

You can only send a command to the API after receiving the device's description. For example in the sample-app module of this repository under src/java/info.plux.pluxapi.sampleapp in the DeviceActivity Class, after line 249 you have an example of an implementation that catches the description intent:

else if(ACTION_COMMAND_REPLY.equals(action)){
                String identifier = intent.getStringExtra(IDENTIFIER);

                if(intent.hasExtra(EXTRA_COMMAND_REPLY) && (intent.getParcelableExtra(EXTRA_COMMAND_REPLY) != null)){
                    Parcelable parcelable = intent.getParcelableExtra(EXTRA_COMMAND_REPLY);
                    if(parcelable.getClass().equals(BITalinoState.class)){ //BITalino
                        Log.d(TAG, ((BITalinoState)parcelable).toString());
                        resultsTextView.setText(parcelable.toString());
                    }
                    else if(parcelable.getClass().equals(BITalinoDescription.class)){ //BITalino
                        isBITalino2 = ((BITalinoDescription)parcelable).isBITalino2();
                        resultsTextView.setText("isBITalino2: " + isBITalino2 + "; FwVersion: " + String.valueOf(((BITalinoDescription)parcelable).getFwVersion()));

//                        if(identifier.equals(identifierBITalino2) && bitalino2 != null){
//                            try {
//                                bitalino2.start(new int[]{0,1,2,3,4,5}, 1);
//                            } catch (BITalinoException e) {
//                                e.printStackTrace();
//                            }
//                        }
                    }
                }
            }

It only is secure to start an acquisition and perform any other commands once you received this description.

If the problem still persists, please let me know.

Best regards,
Gonçalo Telo

[VadymKuriy]

So when I have this exception I need to start once more?

if (bluetoothDevice.getAddress().equals(identifier) && bitalino != null) {
                            try {
                                bitalino.start(new int[]{0, 1, 2, 3, 4, 5}, 1);
                            } catch (BITalinoException e) {
                                e.printStackTrace();
                            }
                        }

Because now I use only one device.
Thx.

[GTelo]

Hi @VadymKuriy,

when you select the device in the Scan Activity, a new activity is started, the Device Activity, once in this activity you need to click on the Connect button, as the description will be show in the TextView available bellow the buttons in the view.

After this you can start your acquisition. The way to go is to uncomment the lines that are commented in the section of code that I added in my previous comment.

Best regards,
Gonçalo Telo

[VadymKuriy]

Hi @GTelo
Yes, I use first connect

try {
                    bitalino.connect(bluetoothDevice.getAddress());
                } catch (BITalinoException e) {
                    e.printStackTrace();
                }

Than when status is connected I use

try {
                    bitalino.start(new int[]{0, 1, 2, 3, 4, 5}, 1);
                } catch (BITalinoException e) {
                    e.printStackTrace();
                }

And also have receiver

private final BroadcastReceiver updateReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            final String action = intent.getAction();
            if (ACTION_STATE_CHANGED.equals(action)) {
                ...
            } else if (ACTION_DATA_AVAILABLE.equals(action)) {
                ...
            } else if (ACTION_COMMAND_REPLY.equals(action)) {
                String identifier = intent.getStringExtra(IDENTIFIER);
                if (intent.hasExtra(EXTRA_COMMAND_REPLY) && (intent.getParcelableExtra(EXTRA_COMMAND_REPLY) != null)) {
                    Parcelable parcelable = intent.getParcelableExtra(EXTRA_COMMAND_REPLY);
if (parcelable.getClass().equals(BITalinoDescription.class)) { //BITalino
                        if (bluetoothDevice.getAddress().equals(identifier) && bitalino != null) {
                            try {
                                bitalino.start(new int[]{0, 1, 2, 3, 4, 5}, 1);
                            } catch (BITalinoException e) {
                                e.printStackTrace();
                            }
                        }
                    }
                }
            }
        }
    };

But I recieved only 3 BITalinoFrame's and than device disconect.
This are logs for states changes from updateReceiver:

05-02 13:36:58.391  DeviceActivity: "" -> CONNECTED
05-02 13:36:58.591 DeviceActivity: "" -> ACQUISITION_OK
05-02 13:37:00.621 DeviceActivity: "" -> DISCONNECTED
05-02 13:37:00.621 DeviceActivity: "" -> CONNECTING
05-02 13:37:00.831  DeviceActivity: ""-> DISCONNECTED
05-02 13:37:00.851 DeviceActivity: "" -> CONNECTING
05-02 13:37:01.401 DeviceActivity: "" -> CONNECTED
05-02 13:37:01.611DeviceActivity: "" -> ACQUISITION_OK
05-02 13:37:03.631 DeviceActivity: "" -> DISCONNECTED

Thx,

[GTelo]

The start should be only called after you receive the BITalino's description:

else if(ACTION_COMMAND_REPLY.equals(action)){
                String identifier = intent.getStringExtra(IDENTIFIER);

                if(intent.hasExtra(EXTRA_COMMAND_REPLY) && (intent.getParcelableExtra(EXTRA_COMMAND_REPLY) != null)){
                    Parcelable parcelable = intent.getParcelableExtra(EXTRA_COMMAND_REPLY);
                    if(parcelable.getClass().equals(BITalinoState.class)){ //BITalino
                        Log.d(TAG, ((BITalinoState)parcelable).toString());
                        resultsTextView.setText(parcelable.toString());
                    }
                    else if(parcelable.getClass().equals(BITalinoDescription.class)){ //BITalino
                        isBITalino2 = ((BITalinoDescription)parcelable).isBITalino2();
                        resultsTextView.setText("isBITalino2: " + isBITalino2 + "; FwVersion: " + String.valueOf(((BITalinoDescription)parcelable).getFwVersion()));

                        //the device is ready
                        if(identifier.equals(identifierBITalino2) && bitalino2 != null){
                            try {
                                bitalino2.start(new int[]{0,1,2,3,4,5}, 1);
                            } catch (BITalinoException e) {
                                e.printStackTrace();
                            }
                        }
                    }
                }
            }

This behaviour is used as a a check of the device's firmware version and only after that you can give commands. For this reason, you should only give the start command after that.

[VadymKuriy]

I have the same problem. Device after acquisition mode return 3 data frames and disconect. Log's are the same.

05-02 14:37:26.801 -> ACQUISITION_OK
05-02 14:37:27.861 Seq: 0; Analog: [0, 0, 0, 318, 47, 0]; Digital: [1, 1, 1, 1]
05-02 14:37:28.861 Seq: 1; Analog: [0, 0, 112, 317, 47, 0]; Digital: [1, 1, 1, 1]
05-02 14:37:29.861 Seq: 2; Analog: [0, 0, 1, 316, 47, 0]; Digital: [1, 1, 1, 1]
05-02 14:37:33.811 -> DISCONNECTED
05-02 14:37:33.811 -> CONNECTING
05-02 14:37:33.991 -> DISCONNECTED
05-02 14:37:34.011 -> CONNECTING
05-02 14:37:34.591 -> CONNECTED
...
05-02 14:38:09.051 -> ACQUISITION_OK
05-02 14:38:10.111 Seq: 0; Analog: [1021, 0, 439, 316, 47, 0]; Digital: [1, 1, 1, 1]
05-02 14:38:11.111 Seq: 1; Analog: [1021, 0, 263, 317, 47, 0]; Digital: [1, 1, 1, 1]
05-02 14:38:12.131 Seq: 2; Analog: [1022, 0, 0, 316, 47, 0]; Digital: [1, 1, 1, 1]`

[GTelo]

Which BITalino version are you using?

[VadymKuriy]

@GTelo 3.3.

[GTelo]

The problem is fixed. If you update your local project it will work fine.

Thank you for your feedback.

Best regards,
Gonçalo Telo

[VadymKuriy]

@GTelo Thx. Everything works!!!