Notify Not getting called sometime

[Mindbowser]

We are trying to use following code,

BleClientManager.getInstance().notify(address.trim(),
                OTA_GATT_SERVICE_UUID,
                OTA_GATT_CHARACTERIC_IDENTIFY_UUID,
                new BleNotifyResponse() {
                    @Override
                    public void onNotify(UUID service, UUID character, byte[] value) {
                        Log.i("DownloadFirmware","onNotify gets called..");
                        response.onNotify(service, character, value);
                    }

                    @Override
                    public void onResponse(int code) {
                        Log.i("BleOperations", String.format("fwUploadIdentifyCharactericNotify  imgType = onResponse %d", code));
                        Log.i("DownloadFirmware","onResponse gets called.."+code);
                        if(code == REQUEST_SUCCESS) {
                            response.firmwareUpgradeSuccess(UPLOAD_IDENTIFY_CHARACTERIC,address);
                        }
                    }
                });

But sometime onNotify is not getting called, I thought to use read method but that is also returning -1, any idea why it is happening sometime only? FYI, it is working flawlessly in iOS app.

[Amitshinde19]

I have facing the same issue. I have getting following exception.

06-22 11:20:11.276: E/BtOppRfcommListener(4398): Error accept connection java.io.IOException: read failed, socket might closed or timeout, read ret: -1 06-22 11:20:11.777: E/BtOppRfcommListener(4398): Error accept connection java.io.IOException: read failed, socket might closed or timeout, read ret: -1 06-22 11:20:12.277: E/BtOppRfcommListener(4398): Error accept connection java.io.IOException: read failed, socket might closed or timeout, read ret: -1

if this might help

https://stackoverflow.com/questions/18657427/ioexception-read-failed-socket-might-closed-bluetooth-on-android-4-3 https://stackoverflow.com/questions/29143695/java-io-ioexception-read-failed-socket-might-closed-or-timeout-read-ret-1-o

[JothsonAshokan]

Hi @Mindbowser,

I am using the same Notify method, Which you have mentioned in your post. I am facing a issue while notifying the Custom UUID's , I am getting a success code as response but its not returning any byte[] value. But the same code is working fine when I used to fetch the Heart Rate values. Do you have any idea on this ? Thanks in Advance!.

[JothsonAshokan]

Hi ,

If anyone is facing a issue on notifying the custom service, please find the below solution code.

copy and paste the below method in BleConnectWorker.class

public void exchangeGattMtu(int mtu) { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { int retry = 6; boolean status = false; while (!status && retry > 0) {

              status = mBluetoothGatt.requestMtu(mtu);

              retry--;

          }

      }

}

And call the below line inside the broadcastCharacterChanged method in the same class (BleConnectWorker.class).

exchangeGattMtu(104);

[Amitshinde19]

public void exchangeGattMtu(int mtu) { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { int retry = 6; boolean status = false; while (!status && retry > 0) {

          status = mBluetoothGatt.requestMtu(mtu);

          retry--;

      }

  }

}

private void broadcastCharacterChanged(UUID service, UUID character, byte[] value) { this.exchangeGattMtu(104); Intent intent = new Intent("action.character_changed"); intent.putExtra("extra.mac", this.mBluetoothDevice.getAddress()); intent.putExtra("extra.service.uuid", service); intent.putExtra("extra.character.uuid", character); intent.putExtra("extra.byte.value", value); BluetoothUtils.sendBroadcast(intent); }

Changed above code in BleConnectWorker class but still it is not calling onNotify().