NodeMCU does not connect to wifi

Question

I'm trying to connect my nodeMCU to my WiFi network but it keeps printing ........ which means is not connecting to the network. Here is my code used to connect to WiFi. Any reason why it isn't connecting to WiFi network?.

#include <ESP8266WiFi.h>

        // Replace these with your WiFi network settings
        const char* ssid = "******"; //replace this with your WiFi network name
        const char* password = "******"; //replace this with your WiFi network password

        void setup()
        {
          delay(1000);
          Serial.begin(57600);

          WiFi.begin(ssid, password);

          Serial.println();
          Serial.print("Connecting");
          while (WiFi.status() != WL_CONNECTED)
          {
            delay(500);
            Serial.print(".");
          }

          Serial.println("success!");
          Serial.print("IP Address is: ");
          Serial.println(WiFi.localIP());
        }

        void loop() {
        }

Answer 1

If your WiFi network doesn't have DHCP, then you must set the IP addresses

example:

  IPAddress ip(192, 168, 1, 8);
  IPAddress gw(192, 168, 1, 1);
  IPAddress sn(255, 255, 255, 0);
  WiFi.config(ip, gw, sn, gw);

gw is gateway. the last parmeter is dns server's IP. sn is subnet mask.

Answer 2

If your powering the device via a computer USB port there is a good chance it’s not providing enough power for the wifi. Try powering fron an external source.