Revision SPI with Switch

// LIBRARY
#include <SPI.h>
#include <Ethernet.h>
#include <Wire.h>
#include "RTClib.h"
#include <RTC_DS3234.h>
#include <SD.h>
#include <TextFinder.h>

// pin definition
#define S1 A0
#define ACT1 5
#define LAMP 9

// SPI bus pin definition
#define SDS 4
#define RTCS 8
#define ETHS 10

// progmem for avoid spurious warning in RTC
#undef PROGMEM
#define PROGMEM __attribute__(( section(".progmem.data") ))
#undef PSTR
#define PSTR(s) (__extension__({static prog_char __c[] PROGMEM = (s); &__c[0];}))

// Create an RTC instance, RTC in pin 8
RTC_DS3234 RTC(RTCS);

// Syste Variable
File myFile;                  // SD file
int ave1;                     // avreaging variable
char filename[] = "L000.CSV";  // INIT LOCAL FILE NAME
boolean lastConnected = false;
boolean ledState = 0;
int countAct = 0;

// ==== CONFIGURABLE FROM SDCARD == //
int LOCATION_ID = 1;         // CONF 9
int DELAY_READ  = 1;         // CONF 10 (MIN)
int NSTEP = 4 ;              // CONF 11
int CHECK_SETTING = 5;       // CONF 12 (MIN)
int LOWER_LIMIT = 100;       // CONF 14 (VAL)
int ACT_PERIOD = 3;          // CONF 15 (SECOND)
// ==== END OF CONFIGURABLE PARAMS== //

// TIMER MILLIS
unsigned long lastReading, periodRead;
unsigned long lastCheck, periodCheck;

// NETWORK SETTINGS
byte mac[] = { 0x90, 0xA2, 0xDA, 0x00, 0x92, 0x5A };
byte ip[] = { 192, 168, 11, 221 };
byte dnsGw[] = { 192, 168, 11, 1 };
char remoteServer[] = "agrieye.host22.com";
IPAddress netmask(255,255,255,0);
EthernetClient client;
TextFinder finder (client);

/// ========== SETUP ======== ///
void setup() {
  Serial.begin(9600);

  // disable all spi (4)
  // SDCARD device
  pinMode(SDS,OUTPUT);
  digitalWrite(SDS, HIGH);

  // RTC device (8)
  pinMode(RTCS, OUTPUT);
  digitalWrite(RTCS,HIGH);

  // ETHERNET device(10)
  pinMode(ETHS, OUTPUT);
  digitalWrite(ETHS, HIGH);

  // Start SPI and RTC
  SPI.begin();
  RTC.begin();

  //RTC.adjust(DateTime(__DATE__, __TIME__));

  // INOUT OUTPUT PIN DEFINITION
  pinMode(S1, INPUT);
  pinMode(ACT1, OUTPUT);
  pinMode(LAMP, OUTPUT);

  // adjust the RTC
  if (!RTC.isrunning()) {
    Serial.println("Not Running!");
    // following line sets the RTC to the date & time this sketch was compiled
    RTC.adjust(DateTime(__DATE__, __TIME__));
  }

  // Ethernet Setup <-- I don't know is it the right order for setup
  networkSetup();
}
/// ====== END OF SETUP ====== ///


/// ====== LOOP SECTION ====== ///
void loop() {
  if (client.available()) {
    char c = client.read();
    Serial.print(c);
   }

  if(!client.connected() && lastConnected) {
    Serial.println("disc");
    client.stop();
    digitalWrite(ETHS, HIGH);
    }

  // 1. READING SENSOR
  unsigned long timerReading = millis();
  periodRead = DELAY_READ;
  periodRead = periodRead*15*1000;
  if(timerReading - lastReading > periodRead) {
    lastReading = timerReading;

    // turn on the lamp
    digitalWrite(LAMP, HIGH);
    // read the sensor
    readSensor();

    // sending data to server
    if(!sendServer()) {
      // if sending data failed then store data in Sd-card
      // check date and time, inactive the ethernet pin and activate rtc pin
      digitalWrite(ETHS, HIGH);
      pinMode(RTCS, LOW);
      DateTime now = RTC.now();
      // set HIGH to inactive the pin
      pinMode(RTCS, HIGH);

      Serial.print("file:");
      Serial.println(filename);
      digitalWrite(SDS, LOW);

      sdCardSetup();

      // open files and write it
      myFile = SD.open(filename, FILE_WRITE);
      if(myFile) {

        myFile.print(now.year(), DEC);
        myFile.print('/');
        myFile.print(now.month(), DEC);
        myFile.print('/');
        myFile.print(now.day(), DEC);
        myFile.print(' ');
        myFile.print(now.hour(), DEC);
        myFile.print(':');
        myFile.print(now.minute(), DEC);
        myFile.print(':');
        myFile.print(now.second(), DEC);
        myFile.print(",");

        myFile.print(LOCATION_ID);
        myFile.print(",");
        myFile.print(ave1);
        myFile.print(",0,0,0,0,0");
        myFile.print(",");
        myFile.println(ledState);
        myFile.close();
        Serial.println("svd");

        // end of saving in sd, deactivate the sd pin
        digitalWrite(SDS, HIGH);
      }
      else {
        Serial.println("error");
        myFile.close();
      }
    } else {
    // flaglastConnected
    lastConnected = client.connected();
    }

    // turn on the lamp
    digitalWrite(LAMP, LOW);
  }

   // status connection
   lastConnected = client.connected();
}