#include "WiFi.h"
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd = LiquidCrystal_I2C(0x27, 16, 2);

const int button = 15;
int selected = 0;
int n = 2;

//char* Example_SSID[3] = {"Test NET", "WOKWEB", "ERR"};
//char* Example_RSSI[3] = {"000", "111", "ERR"};

bool updated = true;

boolean lBut = LOW;
boolean cBut = LOW;

boolean Debounce(boolean last){
  boolean current = digitalRead(button);

  if(last != current){
    delay(5);
    current = digitalRead(button);
    //return current;
  }
  return current;
}

void ButtonHandler(){
  cBut = Debounce(lBut);

  if(lBut == LOW && cBut == HIGH){
    updated = true;
    selected++;
    if(selected == n){
      selected = 0;
    }
  }

  lBut = cBut;
}



void setup() {
  Serial.begin(115200);
  Serial.println("Initializing WiFi...");
  WiFi.mode(WIFI_STA);
  Serial.println("Setup done!");
  lcd.init();
  lcd.backlight();
  lcd.print("Scanning...");
  n = WiFi.scanNetworks();

  pinMode(button, INPUT);
}

void loop() {
  ButtonHandler();  
  if (n == 0) {
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("No networks");
    lcd.setCursor(0, 1);
    lcd.print("found!");
  }
  else {    
    if(updated){
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print(n); lcd.print(" networks found");
      lcd.setCursor(0, 1);
      //lcd.print(Example_SSID[selected]); lcd.print(", "); lcd.print(Example_RSSI[selected]);
      lcd.print(WiFi.SSID(selected)); lcd.print(", "); lcd.print(WiFi.RSSI(selected));
      updated = false;
    }    
  }
}