WeMos D1r2 WiFi Network Scanner

/*
 * WeMos D1r2 WiFi Network Scanner
 *
 * learnelectronics
 * 19 MAY 2017
 *
 * www.youtube.com/c/learnelectronics
 * [email protected]
 *
 * NOTE: To use the Adafruit SSD1306 OLED Driver with the D1 you MUST set
 * the OLED-Reset to LED_BUILTIN
 */

#include <Wire.h>                                                                   //I2C Library for the OLED
#include <Adafruit_SSD1306.h>                                                       //OLED Driver
#include "ESP8266WiFi.h"                                                            //ESP8266 WiFi Library


Adafruit_SSD1306 display(LED_BUILTIN);                                              //create OLED object called display

void setup()   {

  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);                                        //start the OLED @ Hex addy 0x3C
  display.display();                                                                //show the Adafruit Logo
  delay(2000);                                                                      //for 2 seconds
  display.clearDisplay();                                                           //clear display & buffer
  WiFi.mode(WIFI_STA);                                                              //set WiFi mode
  WiFi.disconnect();                                                                //WiFi disconnect
  delay(100);                                                                       //short wait

}


void loop() {

  display.clearDisplay();                                                           //clear display @ beginning of each loop
  display.setTextSize(1);                                                           //set smallest text size
  display.setTextColor(WHITE);                                                      //set text color to WHITE
  display.setCursor(0,0);                                                           //cursor to upper left

  //display.println("scan start");

int n = WiFi.scanNetworks();                                                        //get # of networks
  display.println("WiFi Scanner");                                                  //print title to buffer
  display.println("---- -------");                                                  //underline title to buffer
  if (n == 0)                                                                       //if no networks found
    display.println("no networks found");                                           //print msg to buffer
  else                                                                              //otherwise..
  {
    display.print(n);                                                               //print n to buffer
    display.println(" networks found");                                             //print msg to buffer
    for (int i = 0; i < n; ++i)                                                     //for loop for # of networks
    {
                                                                                    //print SSID and RSSI for each network found
      display.print(i + 1);
      display.print(": ");
      display.print(WiFi.SSID(i));
      display.print(" (");
      display.print(WiFi.RSSI(i));
      display.print(")");
      display.println((WiFi.encryptionType(i) == ENC_TYPE_NONE)?" ":"*");
      delay(10);
    }
  }
  Serial.println("");

  display.display();                                                               //show buffer
  delay(5000);                                                                     //wait 5 seconds
}