ESP8266 - nenajde sieť

[nomat]

Čaute ľudia...
už asi zo zúfalosti tu píšem... pracujem s Arduinom Mega2560... potrebujem spojazdniť komunikáciu PC - ESP8266.
našiel som na nete zdroják (priložím na konci) ...nemenil som na ňom vôbec nič akurát SSID a PASS.... po spustení programu som bol riadne pripojený k WiFine (ESP_niečo) . všetko fungovalo bez problémov.
keď som spojenie prerušil, už som WiFi viac nenašiel. vôbec sa nemôžem pripojiť k ESP8266... poraďte pls, lebo už fakt neviem....

zdrojak:
//#include <SoftwareSerial.h>
//use mega Serial 2 for serial monitor; Serial 1 on pins 19 (RX) and 18 (TX);// Serial2 on pins 17 (RX) and 16 (TX), Serial3 on pins 15 (RX) and 14 (TX).
#define SSID "enter SSID here"
#define PASS "enter password here"
#define DST_IP "220.181.111.85" //baidu.com
//SoftwareSerial dbgSerial(10, 11); // RX, TX
void setup()
{
// Open serial communications and wait for port to open:
//serial 2 is to esp8266
Serial2.begin(9600);//9600 (mine), 57600, 115200
Serial2.setTimeout(1000);

//serial 0 is to usb
Serial.begin(115200);


while(!Serial);
while(!Serial2);

//dbgSerial.begin(9600); //can't be faster than 19200 for softserial
//dbgSerial.println("ESP8266 Demo");
Serial.println("ESP8266 Demo on Mega2560");

while(Serial2.available()>0)
Serial2.read();

delay(1000);
//test if the module is ready
Serial2.println("AT+RST");
//delay(1000);
//delay(1000);
Serial.println("Resetting module");
Serial2.flush();

//if(Serial2.find("ready"))
if(Serial2.find("Ready")||Serial2.find("ready"))
{
//dbgSerial.println("Module is ready");
Serial.println("Module is ready");
}
else
{
//dbgSerial.println("Module have no response.");
Serial.println("Module have no response.");
while(1);
}
delay(1000);
//connect to the wifi
boolean connected=false;
for(int i=0;i<5;i++)
{
if(connectWiFi())
{
connected = true;
break;
}
}
if (!connected){while(1);}
delay(5000);
//print the ip addr
/*
Serial2.println("AT+CIFSR");
Serial.println("ip address:");
while (Serial2.available())
Serial.write(Serial2.read());

*/
//set the single connection mode
Serial2.println("AT+CIPMUX=0");
}
void loop()
{
String cmd = "AT+CIPSTART=\"TCP\",\"";
cmd += DST_IP;
cmd += "\",80";
Serial2.println(cmd);
//dbgSerial.println(cmd);
Serial.println(cmd);
if(Serial2.find("Error")) return;
cmd = "GET / HTTP/1.0\r\n\r\n";
Serial2.print("AT+CIPSEND=");
Serial2.println(cmd.length());
if(Serial2.find(">"))
{
//dbgSerial.print(">");
Serial.print(">");
}else
{
Serial2.println("AT+CIPCLOSE");
//dbgSerial.println("connect timeout");
Serial.println("connect timeout");
delay(1000);
return;
}
Serial2.print(cmd);
delay(2000);
//Serial.find("+IPD");
while (Serial2.available())
{
char c = Serial2.read();
//dbgSerial.write(c);
Serial.write(c);
//if(c=='\r') dbgSerial.print('\n');
if(c=='\r') Serial.print('\n');
}
//dbgSerial.println("====");
Serial.println("====");
delay(1000);
}
boolean connectWiFi()
{
Serial2.println("AT+CWMODE=1");
String cmd="AT+CWJAP=\"";
cmd+=SSID;
cmd+="\",\"";
cmd+=PASS;
cmd+="\"";
//dbgSerial.println(cmd);
Serial2.println(cmd);
Serial.println(cmd);
delay(2000);
if(Serial2.find("OK"))
{
//dbgSerial.println("OK, Connected to WiFi.");
Serial.println("OK, Connected to WiFi.");
return true;
}else
{
//dbgSerial.println("Can not connect to the WiFi.");
Serial.println("Can not connect to the WiFi.");
return false;
}
}