I'm delving into the world of serial communication for the first time and wanted to use b4j as a base.
Looking around I see that I should be able to use jSerial lib to send / receive data through USB port to a USB to RS232 lead.
Just as a quick and dirty test I chucked this together
At the end of the 'Log()' line I have put the logged value. As you can see the Adaptor lead is indeed detected (it is Com5) but when I try to open the port I get an error that the port is not found..... Funny, you saw it a second ago
Any Clues?
Looking around I see that I should be able to use jSerial lib to send / receive data through USB port to a USB to RS232 lead.
Just as a quick and dirty test I chucked this together
B4X:
Sub AppStart (Form1 As Form, Args() As String)
MainForm = Form1
'MainForm.RootPane.LoadLayout("Layout1") 'Load the layout file.
MainForm.Show
USB.Initialize("USB")
Log(USB.ListPorts) '(ArrayList) [COM5]
Log(USB.ListPorts.Get(0)) 'COM5
USB.Open(USB.ListPorts.Get(0))
astream.Initializeprefix(USB.GetInputStream, True, USB.GetOutputStream, "astream")
'USB.SetParams(9600, 8, 1, 0)
End Sub
Sub MainForm_Closed
USB.Close
End Sub
Sub astream_NewData (Buffer() As Byte)
Dim s As String = BytesToString(Buffer, 0, Buffer.Length, "UTF8")
Log(s)
End SubAt the end of the 'Log()' line I have put the logged value. As you can see the Adaptor lead is indeed detected (it is Com5) but when I try to open the port I get an error that the port is not found..... Funny, you saw it a second ago
Any Clues?