/*
  SD card read/write

 This example shows how to read and write data to and from an SD card file
 The circuit:
 * SD card attached to SPI bus as follows:
 ** MOSI - pin 11
 ** MISO - pin 12
 ** CLK - pin 13
 ** CS - pin 4

 created   Nov 2010
 by David A. Mellis
 modified 9 Apr 2012
 by Tom Igoe

 This example code is in the public domain.

 */

#include <SPI.h>
#include <SD.h>
#include "ESP8266WiFi.h"

//Sd2Card card;


File myFile;

void setup()
{
  // Open serial communications and wait for port to open:
  //SPI.begin();
  Serial.begin(9600);
  while (!Serial) {
    ; // wait for serial port to connect. Needed for native USB port only
  }

 
  Serial.print("Initializing SD card...");

  if (!SD.begin(4)) { //if (!card.init(SPI_HALF_SPEED, 4)) {
    Serial.println("initialization failed!");
    return;
  }
  Serial.println("initialization done.");


  WiFi.mode(WIFI_STA);
  WiFi.disconnect();
  delay(100); 
  
}

void loop()
{
  // nothing happens after setup

  // open the file. note that only one file can be open at a time,
  // so you have to close this one before opening another.
  myFile = SD.open("scan.txt", FILE_WRITE);

  // if the file opened okay, write to it:
  if (myFile) {
  //  Serial.print("Writing to scan.txt...");
//    myFile.println("testing 1, 2, 3.");
    // close the file:
//    myFile.close();
//    Serial.println("done.");


  Serial.println("scan start");
  myFile.println("scan start");
  // WiFi.scanNetworks will return the number of networks found
  int n = WiFi.scanNetworks();
  char ssid[64];
  Serial.println("scan done");
  myFile.println("scan done");
  if (n == 0) {
    Serial.println("no networks found");
      myFile.println("no networks found");
  }
  else
  {
    Serial.print(n);
    myFile.print(n);
    Serial.println(" networks found");
    myFile.println(" networks found");
    for (int i = 0; i < n; ++i)
    {
      delay(10);   
      // Print SSID and RSSI for each network found
      Serial.print(i + 1);
      myFile.print(i + 1);
      Serial.print(": ");
      myFile.print(": ");
      Serial.print(WiFi.SSID(i));
      myFile.print(WiFi.SSID(i));
      Serial.print(" (");
      myFile.print(" (");
      Serial.print(WiFi.RSSI(i));
      myFile.print(WiFi.RSSI(i));
      Serial.print(")");
      myFile.print(")");
      Serial.println((WiFi.encryptionType(i) == ENC_TYPE_NONE)?" ":"*");
      myFile.println((WiFi.encryptionType(i) == ENC_TYPE_NONE)?" ":"*");      
      if (WiFi.encryptionType(i)==2) {
        Serial.println("TKIP(WPA)");
        myFile.println("TKIP(WPA)");
      }
      else if (WiFi.encryptionType(i)==5) {
        Serial.println("WEP");
        myFile.println("WEP");
      }
      else if (WiFi.encryptionType(i)==4) {
        Serial.println("CCMP(WPA)");
        myFile.println("CCMP(WPA)");
      }
      else if (WiFi.encryptionType(i)==7) {
        Serial.println("NONE");
        myFile.println("NONE");
        delay(10); 
      }
      if (WiFi.encryptionType(i)==8) 
        Serial.println("AUTO");        
        myFile.println("AUTO");
      delay(10);
    }
  }
  Serial.println("");
  myFile.println("");
  // Wait a bit before scanning again
  delay(2000);
  } else {
    // if the file didn't open, print an error:
    Serial.println("error opening scan.txt");
  }
    myFile.close();
delay(5000);
}