Android Question Bluetooth serial port, Async stream without prefix

[peacemaker]

Hi,

Receiving from port

Sub AStream_NewData (Buffer() As Byte)
ProgressDialogHide
Dim a As String
a = BytesToString(Buffer, 0, Buffer.Length, "UTF8")

and buffer is always different length, the string "test" sent is received letter by letter in this sub. Sometime 2 letters together, and later others one by one.

How to be sure that whole the reply is fully received ?

 

[Erel]

The question is whether there is a standard character that ends each message.
Check this class [class] AsyncStreamsText - Useful when working with streams of text
It works with messages that end with an end of line character.

 

[peacemaker]

Thanks, Erel,
But how to be if the other side is the ready device working with some fixed system prefix "qwerty" ? And CRLF not used.

 

[Erel]

You should implement something similar to AsyncStreamsText. You should collect the characters with a StringBuilder and check whether you have a complete message.

 

[peacemaker]

I suspected this :-(
thanks :0)