Still working on that, but I found another mobile router that does work fine. So interesting that it is just a specific brand of router that the ESP32 doesn't like...

Note that I have found it is sensitive to which router I use. I found another router that works fine. But ESP32 doesn't seem to like the TP-Link N150 Wireless 3G/4G Portable Router, at least for TCP traffic. For UDP it works great. Are there known issues in the TCP stack, or router settings/security...

Having a weird problem, the where TCP "accept" is not returning. I can send UDP messages to the device, but it is not receiving a TCP connection. Wireshark shows my request is going out from my PC, but ESP32 is not responding. I get the same problem with the this https://github.com/cmmakerclub/esp32...