Bluetooth Low Energy (BLE) library

Erel · Jan 25, 2015

This means that the internal onConnectionStateChange event never fires as it should be.

As I wrote in the first post BLE in its current state is problematic.

If you are using USB debugging then it is worth checking the unfiltered logs.

bioident · Jan 25, 2015

I tested few comercial program and BLE work stable on Android 4.4.2
On my phone and the same version.
Something must be wrong in this implementation on B4A.
Or I have not good implementation.
Please send to me work project BLE- example code

Erel · Jan 25, 2015

Try the code in the first post.

bioident · Jan 25, 2015

Erel said:
Try the code in the first post.

I used it.
Don't call Sub BLE_Connected and BLE_CharacteristicRead.
Could You share project of it ?

Erel · Jan 26, 2015

This project works here.

bioident · Jan 27, 2015

Erel said:
This project works here.

This project is no work.

Can be a problem with patch ?
I use B4A 4.0
Path:
JAVA: version jdk1.8.0_25
ANDROID: version 19

Maybe not correct version.
In manifest target is 19

Erel · Jan 27, 2015

In which way it doesn't work?

bioident · Jan 27, 2015

Erel said:
In which way it doesn't work?

The same problem.
Only search.
But without connect and read charateristic

Erel · Jan 27, 2015

A low level API is failing on your device (gatt.discoverServices never completes). I don't see any workaround for this.

bioident · Jan 27, 2015

Erel said:
A low level API is failing on your device (gatt.discoverServices never completes). I don't see any workaround for this.

If I connect few times I get discoverServices

bioident · Jan 28, 2015

bioident said:
If I connect few times I get discoverServices

Another application from shop PLAY work perfect .
Why I can't use BLE and B4A without problem ?
PLEASE HELPS EREL

Erel · Jan 29, 2015

The BLE library is implemented based on Google documentation. It does work on most devices.

If the native callback method is not working then I don't see any workaround. Does the other app actually connect to the BLE device?

bioident · Mar 11, 2015

Erel said:
The BLE library is implemented based on Google documentation. It does work on most devices.

If the native callback method is not working then I don't see any workaround. Does the other app actually connect to the BLE device?

Yes, I have another application connect to BLE devices.

Thuong · Jun 12, 2015

Dear
My Characteristic has array of hex byte. How can I receive to array variable?
Thank

Erel · Jun 12, 2015

Characteristic.GetValue will return an array of bytes.

Thuong · Jun 13, 2015

Thank Erel
Can you write a example code of Characteristic.GetValue

Erel · Jun 14, 2015

This method just returns an array of bytes:

B4X:

Dim data() As Byte = Char1.GetValue

Thuong · Jun 14, 2015

Thank Erel
with your code, I ready solved my problem

Thuong · Jun 15, 2015

Erel said:

You can do something like:

B4X:

Sub BLE_Connected (Services As Map)
  For Each s As BleService In Services.Values
   For Each key As String In s.GetCharacteristics
     Log(key)
      Dim c As BleCharacteristic = s.GetCharacteristics.Get(key)
   Next
Next

Dear Erel
I used this code, but log display null (nothing service found) although with BLE Scanner software from google play indicate more services
Thank

Erel · Jun 15, 2015

What is the output of Log("Services = " & Services)?

Bluetooth Low Energy (BLE) library

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