Android Question Sending large data(BLE)

medsport2012 · Jun 17, 2021

Hi, i'm trying to send a string which has more then 20 chars.
For this i use RequestMtu

B4X:

Sub Manager_Connected (services As List)
    manager.RequestMtu(80)
End Sub

But nothing happens.
This event doesn't output anything either:

B4X:

Sub Manager_MtuChanged (Success As Boolean)
    Log("MTU: " & Success)
End Sub

Erel · Jun 18, 2021

What is the output of:

B4X:

Sub Manager_Connected (services As List)
    Log(manager.RequestMtu(80))
End Sub

Have you set the event name to Manager?

medsport2012 · Jun 18, 2021

Hi, thaks for reply.
Output: true

Have you set the event name to Manager?

Yes, i called it manager

Erel · Jun 20, 2021

Android 5+ device, right?

It is expected to raise the event. Worth testing with a different device.

medsport2012 · Jun 20, 2021

Thanks, i will try and give a response.

medsport2012 · Jun 20, 2021

I tried on the Xiaomi mi note 10 and i got the same result(only 20 bytes).

Erel · Jun 20, 2021

It is expected that the MTU will not change. Most devices do not support larger packets.

The event should raise.

medsport2012 · Jun 21, 2021

Thank you

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