Arduino and NodeMCU infinite loop when checking connection status esp8266.find

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And why do you tell me that this function does not print anything if it does? It prints response from esp -> Serial.print(response). There is a body of this function in previous post (and in first post).

Your second snippet in the post I was referring to was:

esp8266Serial("AT+CWJAP=\"SSID\",\"Password\"\r\n", 5000, DEBUG);
    while(!esp8266.find("OK"))
    {}.

Which line, of those three, were you thinking of, when you said that that snippet printed something?

You don't need to bother replying, for my benefit, because I am done with you.