Controlling room lights and fan using aluminium foil touch

code.ino

#include <CapacitiveSensor.h>
CapacitiveSensor c32 = CapacitiveSensor(3,2);
CapacitiveSensor c45 = CapacitiveSensor(4,5);
//CapacitiveSensor c1110 = CapacitiveSensor(11,10);

#define THRESHOLD 100
#define o1 7
#define o2 8
#define FREQ 50

void setup() {
  // put your setup code here, to run once:
  c32.set_CS_AutocaL_Millis(0xFFFFFFFF);
  c45.set_CS_AutocaL_Millis(0xFFFFFFFF);
//  c1110.set_CS_AutocaL_Millis(0xFFFFFFFF);
  Serial.begin(9600);
  
  pinMode(o1, OUTPUT);
  pinMode(o2, OUTPUT);
}

int s1 = 0;
int s2 = 0;

int i1 = 0; // state of instrument 1
int i2 = 0; // state of instrument 2

inline void swap(int *x) {
  *x = (*x == 1) ? 0 : 1;
}

void printState() {
  Serial.print("INST1 ");
  if (i1 == 0) Serial.print("OFF");
  else Serial.print("ON");
  
  Serial.print("\t");
  
  Serial.print("INST2 ");
  if (i2 == 0) Serial.print("OFF");
  else Serial.print("ON");
  
  Serial.print("\n");
}

void controlEquipments() {
  if (i1 == 1) digitalWrite(o1, HIGH);
  else digitalWrite(o1, LOW);
  
  if (i2 == 1) digitalWrite(o2, HIGH);
  else digitalWrite(o2, LOW);
}

void loop() {
 controlEquipments();
  
  // put your main code here, to run repeatedly:
  long start = millis();
  long total1 = c32.capacitiveSensor(30);
  long total2 = c45.capacitiveSensor(30);
//  long total3 = c1110.capacitiveSensor(30);

  
  Serial.print(millis() - start);
  Serial.print("\t");
  Serial.print(total1);
  Serial.print("\t");
  Serial.print(total2);
//  Serial.print("\t");
//  Serial.print(total3);
  Serial.print("\n");
  
  if (total2 > THRESHOLD) {
    if (s2 == 0) {
      s2 = 1;
      swap(&i2);
      printState();
    }
  } else {
    if (s2 == 1) {
      s2 = 0;
    }
  }
  
  if (total1 > THRESHOLD) {
    if (s1 == 0) {
      s1 = 1;
      swap(&i1);
      printState();
    }
  } else {
    if (s1 == 1) {
      s1 = 0;
    }
  }
  
  delay(FREQ);
}