Hi Andi,
The 4.2.1 update is mostly bug fixes in the NETMF firmware. One of those bug fixes is that we were not throwing exceptions properly in some cases in the earlier versions (such as when trying to create two OutputPorts with the same pin).
Let's make sure we get your serial comm back up and running, along with the [nwazet touchscreen accessory. Let's attach one of those at a time.
First, the serial communication. What is/is not working, specifically? Are you able to open the port? Does data get sent? What type of device are you talking to? If you switch to a GoPort on the other side of the board, does it work then?
Chris
many thanks for your quick reply. I will check and will give you an update shortly. So far I saw that I could open the port but couldnt send data. But please let me double check.
Would you recommend us to "remove all of the Secretlab libraries"?
Best wishes and take care
Andi ;-)