Android Question Async stream prefix_?

[sanduro]

I use modified version of bluetooth example.

When I go in raw mode
AStream.Initialize(Main.serial1.InputStream, Main.serial1.OutputStream, "AStream")
everythings all right

until i switch to prefix
AStream.InitializePrefix(Main.serial1.InputStream, False, Main.serial1.OutputStream, "AStream")
getting
AStream_Terminated event
Though data should be all right

dump

8E8E8E8EFE8102010200800000000000000000003C00F00000000000A600F900000101012B6756CE
01040100010E0005000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000AAAAAAAA

this is sent circulary

 

[Erel]

Have you implemented the "prefix" protocol on the other size of the connection?

 

[sanduro]

This is the data I am receving from other side, is there anything more I need to receive the data via prefix that sender side sends 4 same bytes of length on the begging of the message ?

I am just receiving the data on android so far ?

San

 

[Erel]

Each message should start with the message length encoded as an Int32 (4 bytes). The message length should not include the 4 bytes.

 

[mc73]

From the logs, the prefix is obviously wrong. You shouldn't see 4 equal bytes in the beginning. You should encode it the way Erel just mentioned.

 

[sanduro]

Sorry so i misunderstood, I will change it , BTW how AsyncStream knows what is the beggining of the message ????? If it catches somewhere in the middle of the message ?

THX FOR HELP

 

[Erel]

It can only work if it receives the beginning of the first message. If you are intercepting "random" messages then you should not use prefix mode.

 

[sanduro]

hmmm , thats the problem I have, well then I should restart the connection on connection broke then .....

Problem i try to solve is because of wifi, bluestooth is allright and works fine, with wifi it randomly buffers messages and raises newData event randomly 1-7 seconds .... hmmm

 

[Erel]

See my answer in the other thread you started.