Send commands from BLE central (bluetooth for arduino iphone apk) to BLE peripheral (nano 33 iot)

[mestor]

I'm having trouble doing my arduino to receive and read commands from mi iphone i combined 2 codes for that propose one is from electronic clinic and the other is an example this is the code:

#include <ArduinoBLE.h>
 
int relay1 = 1; // car switch ON
long int password1 = 98421615;// to on switch
long int password2 = 96951628;// to off switch
 
int relay2 = 2; // engin ON " this will turn on the switch for few seconds to turn on the engine, after the engine starts the switch is released again.
long int password3 = 74151525; // engine self on
long int password31 = 45614787; // engine self 0ff
 
int relay3 = 3; // doors open
long int password4 = 84515822;
 
int relay4 = 4; // doors close
long int password5 = 81426337;

int relay6 = 5; // for horn
long int password8 = 34156469; // to turn the horn button

int relay7 = 6; // anti theft
long int password9 = 24127161; // to turn on anti theft
long int password10 = 48615369; // to turn off anti theft



BLEService value("19B10000-E8F2-537E-4F6C-D104768A1214"); // Bluetooth® Low Energy LED Service

// Bluetooth® Low Energy LED Switch Characteristic - custom 128-bit UUID, read and writable by central
BLEByteCharacteristic switchCharacteristic("19B10001-E8F2-537E-4F6C-D104768A1214", BLERead | BLEWrite);

void setup() {
  
pinMode(relay1, OUTPUT); 
digitalWrite(relay1, LOW);
 
pinMode(relay2, OUTPUT); 
digitalWrite(relay2, LOW);
 
pinMode(relay3, OUTPUT); 
digitalWrite(relay3, LOW);
 
pinMode(relay4, OUTPUT); 
digitalWrite(relay4, LOW);
 
pinMode(relay6, OUTPUT); 
digitalWrite(relay6, LOW);
 
pinMode(relay7, OUTPUT); 
//digitalWrite(relay7, LOW);
digitalWrite(relay7, HIGH);
delay(500);
 
// incase if the power from battery is disconnected and then connected again then the horn will on and off few times 
 
digitalWrite( relay6, HIGH);
delay(1000);
digitalWrite(relay6, LOW);
delay(500);
digitalWrite( relay6, HIGH);
delay(1000);
digitalWrite(relay6, LOW);
delay(500);
digitalWrite( relay6, HIGH);
delay(1000);
digitalWrite(relay6, LOW);
delay(500);
  
  Serial.begin(9600);
  while (!Serial);


  // begin initialization
  if (!BLE.begin()) {
    Serial.println("starting Bluetooth® Low Energy module failed!");

    while (1);
  }

  // set advertised local name and service UUID:
  BLE.setLocalName("C20");
  BLE.setAdvertisedService(value);

  // add the characteristic to the service
  value.addCharacteristic(switchCharacteristic);

  // add service
  BLE.addService(value);

  // set the initial value for the characeristic:
  switchCharacteristic.writeValue(0);

  // start advertising
  BLE.advertise();

  Serial.println("C20");
}

void loop() {
  // listen for Bluetooth® Low Energy peripherals to connect:
  BLEDevice central = BLE.central();

  // if a central is connected to peripheral:
  if (central) {
    Serial.print("Connected to central: ");
    // print the central's MAC address:
    Serial.println(central.address());

    // while the central is still connected to peripheral:
    while (central.connected()) {
 // if the remote device wrote to the characteristic,
      // use the value to control the LED:
      if (switchCharacteristic.written()) {
        if (switchCharacteristic.value()) {   // any value other than 0

      if (value == password1)
{
  digitalWrite(relay1,HIGH);
  Serial.println("Switch On");
  delay(1000);
  BLE.value=0;
  
 
   }
   
   if( value == password2)
   {
       digitalWrite(relay1,LOW);
  Serial.println("Switch OFF");
  BLE.value=0;
   }
 
   if( value == password3) // for self on
   {
       digitalWrite(relay2,HIGH);
  Serial.println("Self ON");
delay(2000);
digitalWrite(relay2,LOW);
BLE.value=0;
   }
     if( value == password31) // for self off
   {
       digitalWrite(relay2,LOW);
  Serial.println("Self OFF");
  delay(1000);
  BLE.value=0;
 
   } 
   
   if( value == password4) // for doors opening
   {
       digitalWrite(relay3,HIGH); // press button
  Serial.println("Doors Opened");
  delay(2000); // keep the switch pressed for 2 seconds
   digitalWrite(relay3,LOW); // release button
   BLE.value=0;
   }
   
      if( value == password5) // for doors opening
   {
       digitalWrite(relay4,HIGH); // press button
  Serial.println("Doors Closed");
  delay(2000); // keep the switch pressed for 2 seconds
   digitalWrite(relay4,LOW); // release button
   BLE.value=0;
   }   
             if( value == password8) //to turn on and off horn switch
   {
       digitalWrite(relay6,HIGH); // press button
  Serial.println("Horn ON");
  delay(2000); // keep the switch pressed for 2 seconds
         digitalWrite(relay6,LOW); 
  Serial.print("Horn OFF");
  BLE.value=0;
 
   }
   
                if( value == password9) //to turn on anti theft
   {
       digitalWrite(relay7,HIGH); 
  Serial.println("Anti theft ON");
  delay(2000); 
  BLE.value=0;
 
 
   }
   
                   if( value == password10) //to turn off anti theft
   {
       digitalWrite(relay7,LOW); 
  Serial.println("Anti theft OFF");
  delay(2000);
  BLE.value=0;
 
   }
 
 }
      
     
    }
    }

    // when the central disconnects, print it out:
    Serial.print(F("Disconnected from central: "));
    Serial.println(central.address());
  }
}