Server doesn't work (cannot connect from browser)

[jeffrson]

Hi,

afaict, the server shouldn't use EthernetServer::available (https://www.arduino.cc/en/Reference/ServerAvailable), but EthernetServer::accept (https://www.arduino.cc/en/Reference/EthernetServerAccept).

Otherwise, handleNewClient will identify a "new" client for every other header line - which will mix up "upgrade" and "websocket" flags inside client object.

[Links2004]

sounds interesting, for which platform is this valide?
the ESP WiFi for example is working fine with available

[jeffrson]

This is ATMega platform with W5500.

After I replaced "available" with "accept" it works for me (besides the "=+" bug in websockets.cpp which is still in Arduino IDE 1.8.10).