Bluetooth Low Energy (BLE) library

[Erel]

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]

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]

Try the code in the first post.

 

[bioident]

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]

This project works here.

 

[bioident]

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]

In which way it doesn't work?

 

[bioident]

In which way it doesn't work?

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

 

[Erel]

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

 

[bioident]

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]

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]

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]

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]

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

 

[Erel]

Characteristic.GetValue will return an array of bytes.

 

[Thuong]

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

 

[Erel]

This method just returns an array of bytes:

Dim data() As Byte = Char1.GetValue

 

[Thuong]

Thank Erel
with your code, I ready solved my problem

 

[Thuong]

You can do something like:

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]

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