Espruino Pico webserver

Hmm, it looks like the ESP8266 is just too busy to respond - probably a reboot of the ESP8266 is required (server.close() followed by wifi.reset()).

By the way: The ESP8266 is never contacted until .listen - so createServer will probably always be successful.

It's a bit of a hack but you could use the uncaughtException event if you can't find another way of detecting issues : http://www.espruino.com/Reference#l_proc­ess_uncaughtException