Hi Thank you for answering. Nop, at minimum 5 Byte are always sending. It could not be, that we send zero byte. Strange thing is, when i comment out some WIFI code, the application runs (I testet it for about a few hours). But when i include same code (e.g. getSocketError()), than the crash occures....

I have several UART crashes. So the application runs on CPU 1 and i am using the UART2. The application sends several get commands to an open Socket and the answer is forwarded to the UART2. Crashes occures after about 110 requests, and as you see on the picture from the scope, the RTS signal is set...