Howto debug NSStream

Hi everybody,

I'm right now developing an app that needs to communicate with a device. This Device is connected through a WiFi to Serial Converter.

I'm able to connect to the Device and mostly my App works but sometimes when I connect I get the normal HELLO Response and if I try to send further Data the App hangs in the Function which writes the desired Data to the Stream....

Does anybody know any possibility to see what's going on? Is there any possibility to debug NSStream?

any help is appreciated, g sensslen