From: Henk Kortstra on
Thanks for your suggestion.

I've debugged the open-method from the Serial class.
The following lines are being processed:

---

IF !self:GetProtocol()
BREAK
ENDIF
self:Baud := 9600
self:Parity := "N"
self:ByteSize := 8
self:StopBits := 1

IF !self:SetProtocol()
BREAK
ENDIF

---

After the last line (SetProtocol) the open method is breaking, so the
SetProtocol Failes
It seems to fail with errorcode 87, does somebody knows what that
means?

It is assumable that this is also the cause that my device is not
working.
Assuming that after running the demo-app, the speed / parity / etc is
set correct by the demo-app.

Any suggestions how I can find out what causes the not executing
SetProtocol?

Henk.