iOS Question Encoding problem

[mrossen]

Hi,

I use this way to send serial data in both b4i and b4a

    buffer = sData.GetBytes("ISO-8859-1")
    TcpStreams.Write(buffer)

In b4a this works without problems, but in b4i when i send some type of string it seems like iOS not are sending it. My recieve code are not recieving anything

I am not sure what the problem in the string can be, but if I change the encoding to UTF8 iOS send the string but in my recieve code it makes at crc error.

Anyone knows if there i a difference in the way sending serial data on iOS and android

Mogens

 

[Erel]

Where does the data come from? Is it a string encoded with that encoding?

 

[mrossen]

If I open the file I read the data from, Notepad show the encoding as UTF8

I read the file like this:

If File.Exists(File.DirDocuments, fPath) Then
        lstvar = File.Readlist(File.DirDocuments, fPath)
    Else
        Log("File not exist")
        Return
    End If

 

[Erel]

Is TcpStreams an AsyncStreams object? Where are you sending the data to?

I don't think that encoding has anything to do with this.

 

[mrossen]

Yes. I am sending the data to a esp8266 there is working as at wifi to serial bridge.

This works perfect in b4a and b4j. And it is also working in b4i, but a few files out of approx 900 config files we are using It is not working.

I send the 401 char to the buffer as in post #1, but nothing comes out of the iPhone/iPad. Do I change the encoding to utf8 the iPhone/iPad are sending data but not rigtht. I receive a CRC error from the reciever.

The files I read the data from is encoded in utf8 and is a basic windows ini file structure. I have attached a sample file.

TcpStreams.Initialize(WiFi_Socket.InputStream, WiFi_Socket.OutputStream, "TcpStreams")

    Dim ServerIp As String = "192.168.4.1" 'Access point IP
    Dim Port As Int = 8880                   'Set til port 8880
    WiFi_Socket.Initialize("WiFi_Socket")
    WiFi_Socket.Connect(ServerIp,Port,5000)

 

[Erel]

Are you checking the data length on the receiving side? Don't assume that it will arrive in a single packet.

 

[mrossen]

I have tried to connect my pc com port to the wifi module.

When I use one of the confile that fails nothing is recieved. When i use a working file the data comes. It seems like iOS dont send any data when I use a config file with problem.

 

[Erel]

AsyncStreams just sends bytes. It doesn't know or care where the bytes come from. Add some log message or put breakpoints and find out what is send to AsyncStreams.

A good place to start: https://www.b4x.com/android/forum/threads/b4x-network-asyncstreams-b4xserializator.72149/#content