since TCP Passthrough Mode works all fine, I wanted to try the UDP Passthrough.
What I get from the ESP is
<\n>AT+CWAUTOCONN<\r><\r><\n><\r><\n>ERROR<\r><\n>AT+CIPSTART="UDP","x.x.x.x",8889,8889,0<\r><\r><\n>0,CONNECT<\r><\n><\r><\n>OK<\r><\n>AT+CIPMODE=1<\r><\r><\n><\r><\n>OK<\r><\n>AT+CIPSEND<\r><\r><\n><\r><\n>OK<\r><\n><\r><\n>>Request Time ..... Data
So Request Time is a String that I'am sending from my PC without Problems. Switching off my Firewall and Antivirus on my PC was no success. My Router should not be the Problem since I could already sent plenty of stuff from Matlab via UDP and receive it via LAN again.
Matlab-->UDP 8889-->Wifi-->Router-->Lan-->UDP 8889 --> Matlab
Is something wrong with my ESP? I mean TCP Passthrough works all fine?