Only 5 TCP sockets

[hcs-svn]

As far as I found out until now the default for the maximum number of concurrent TCP sockets ist 5.
Is there a way to increase it?

I see that the ESP32 SDK has an espconn_tcp_set_max_con method but I can not get it working.
Results in linker error: "undefined reference to espconn_tcp_set_max_con(unsigned char)"

Is it possible to use this method to increase the number of concurrent TCP sockets?

[bebo-dot-dev]

does this help: #570 (see max_connection)

[hcs-svn]

Thanks, that pointed me to the right direction.

extern "C" {
  #include "espconn.h"
}

did the trick and
espconn_tcp_set_max_con(8);
allows now 8 concurrent TCP clients

[fpalarmini]

This function "espconn_tcp_set_max_con(uint8 num)" did not work for me. Always returns -12 (invalid argument)... Does anyone have a suggestion?
The version of the toolchain is 2.4.1.

[d-a-v]

espconn is not tested with lwip2. Could you try with lwip1.4 in tools menu ?
Why don't you use arduino's WiFiServer / WiFiClient ?