ESP8266 cannot reconnect to last saved WiFi network - esp8266

Question

I'm using WifiManager library to manually add user's network on configuration portal. Already it works fine, but every time I power off and power on again, it does not connect to network I have established previous. To connect I have to pin out the 'Vcc' of ESP8266 and pin in again and then again connect with ESP8266 network and go to configure portal.
For now I have two lines in code with 'WifiManager';
Good news is that connects to Wifi by configurationPortal.
ESP8266WebServer server; //server variable
void setup() {
initializePin(); //call function
Serial.begin(74880);
delay(500);
//Connect to network
WiFiManager wifiManager;
wifiManager.autoConnect("ESP8266","password");
Serial.println("Connected.");
if (!MDNS.begin("esp8266")) { Serial.println("Error setting up MDNS responder!"); }
else { Serial.println("mDNS responder started"); }
serverSection();
server.begin();
Serial.println("Server started");
}
I need to connect to previous established network,
Also it would be fine to run Configuration Portal if there wont be connection to that network ( for example if device would be transfer to other place)

Answer 1

Your code is supposed to connect to the internet. What happens usually when you use auto connect and it fails is that WL_IDLE_STATUS occurs. Read more about it here: https://www.arduino.cc/en/Reference/WiFiStatus . What I would do is to check if I got that status then I would try to reconnect to the wifi with a delay of 2 seconds. Here is an example:
if (WiFi.status() == WL_IDLE_STATUS) {
delay(2000);
WiFi.begin("yourssid", "password");
}