Get data from electricity meter with IEC62056 protocol via bluetooth

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I am developing an android application.I need to get data from meter by optical probe via bluetooth. As I know I should connect to probe with bluetooth and send some request to that for getting the meter values. Please if anybody knows about how to do it .. help me. I used BluetoothSocket,Outputstream and inputstream but no luck!

What I have tried:

bluetoothSocket = device.createRfcommSocketToServiceRecord(myUUID);

inputStearm = bluetoothSocket .getInputStream();
             outputStream = bluetoothSocket .getOutputStream();

Posted 16-Oct-17 22:33pm

marimir

Updated 16-Oct-17 23:02pm

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Wessel Beulink · Answer 1 · 2017-10-16T23:02:00

Solution 1

First of all, did you update the manifest with the right permissions?
The following permissions needed to be included:

<manifest ... >
  <uses-permission android:name="android.permission.BLUETOOTH" />
  <uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
  <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
  ...
</manifest>

Before continuing to the next phase, make sure the device is already paired up.
You can simply check the paired state with:

if(device.getBondState()==device.BOND_BONDED)

Get the correct UUID(example):

private static final UUID MY_UUID = UUID.fromString("0000110E-0000-1000-8000-00805F9B34FB");

You must be able to get a socket at this point.

mSocket = device.createInsecureRfcommSocketToServiceRecord(MY_UUID);

Read the socket:

mSocket.connect();
InputStream input = mSocket.getInputStream();
DataInputStream dinput = new DataInputStream(input);

You can read it later on with:

dinput.readFully(byteArray, 0, byteArray.length);

Posted 16-Oct-17 23:02pm

Wessel Beulink

Comments

marimir 17-Oct-17 5:30am

Thank you for the answer.. I've tested this code before but the app is actually stopping at the line:
DataInputStream dinput = new DataInputStream(input);

Wessel Beulink 17-Oct-17 5:37am

What is the input result, you are able to debug the result?

marimir 17-Oct-17 5:41am

no the app stopped at the line and I cant get the data from inputstream at all!

Wessel Beulink 17-Oct-17 5:45am

Put a try and catch around it, try to get the exception.
Does logcat not shows a crash report?

marimir 17-Oct-17 5:54am

I've put the try catch but it is just like some long process. no crash is shown in logcat and after a while the app is stopped

Wessel Beulink 17-Oct-17 6:07am

What about the Bluetooth device, is it possible to test the device with an existing app/tool?
Sometimes it happens that device connection crashes without a good reason. A restart of both devices can be helpful sometimes.

marimir 17-Oct-17 6:13am

no both work

marimir 17-Oct-17 6:12am

sorry my app stops when I want to read from the inputstream with bufferreader