Mini WiFi Scanner using OLED

1#include "WiFi.h"
2#include <SPI.h>
3#include <Wire.h>
4#include  <Adafruit_GFX.h>
5#include <Adafruit_SSD1306.h>
6Adafruit_SSD1306 display(-1);
7
8
9
10void  setup()
11{
12    // Set WiFi to station mode and disconnect from an AP if it  was previously connected
13    WiFi.mode(WIFI_STA);
14    WiFi.disconnect();
15    delay(100);
16
17    // initialize with the I2C addr 0x3C
18    display.begin(SSD1306_SWITCHCAPVCC,  0x3C);  
19
20    // Clear the buffer.
21    display.clearDisplay();
22     display.setTextSize(2);
23            display.setTextColor(WHITE);
24            
25            display.setCursor(0,28);
26            display.println(" WIFI SCAN");
27            display.display();
28            delay(2000);
29    
30}
31
32void loop()
33{
34    // WiFi.scanNetworks  will return the number of networks found
35    //MatchState ms;
36    int n =  WiFi.scanNetworks();
37    String ssid[n];
38    String rssi[n];
39    if (n  == 0) {
40        Serial.println("no networks found");
41    } else {
42        Serial.print(n);
43        Serial.println(" networks found");
44        for (int i = 0; i < n; ++i)  {
45            // Print SSID and RSSI for each network found
46            display.clearDisplay();
47            ssid[i] = WiFi.SSID(i);
48            rssi[i] = WiFi.RSSI(i);
49        }
50    }
51
52     for (int i = 0; i < n; ++i) {
53            display.setTextSize(1);
54            display.setTextColor(WHITE);
55            
56            display.setCursor(0,14*i);
57            String ssid2 = ssid[i];
58            ssid2.replace("unifi", "u");  //I customize so that it the display format is in single line
59            display.println(ssid2+":"+  rssi[i]);
60            display.display();
61            delay(100);
62            
63        }
64}