BLE Swift code is scanning but not finding BLE devices - ios

Question

In Swift, and Xcode 9, I am trying to scan for and connect to all BLE devices. This code should print out "no name" for all BLE devices found. Scanning is working, but my BLE devices are not being found. Beside me, there is an Android phone with BLE, which I am unable to find.
Simulation device: iPhone 6s, bluetooth turned -ON
import UIKit
import CoreBluetooth
//let svcLight = CBUUID.itit(string: "24958294582945")
class BLEViewController: UIViewController , CBCentralManagerDelegate, CBPeripheralDelegate{
func centralManagerDidUpdateState(_ central: CBCentralManager) {
//scan for peripherals if "on" state change
if central.state == CBManagerState.poweredOn{
//not concerned with any services for now, and we are not passing in any options
central.scanForPeripherals(withServices: nil, options: nil)
print("scanning...")
//check for other states, add if else statements
}
}
//handle the callback for when something is found
//diddiscover was the autocomplete word for a peripheral
func centralManager(_ central: CBCentralManager, didDiscover peripheral: CBPeripheral, advertisementData: [String : Any], rssi RSSI: NSNumber) {
if peripheral.name?.contains("POR 1007BT") == true {
//even if the peripheral doesn't have a name, we will get some info for it
print (peripheral.name ?? "no name")
centralManager.stopScan()
print(advertisementData)
//connect to the peripheral now
central.connect(peripheral, options: nil)
//store a local copy of the peripheral in the property
myPeripheral = peripheral
}
}
//so our central can begin scanning again
//if peripheral disconnects for whatever reason, it will immidiately start scanning
func centralManager(_ central: CBCentralManager, didDisconnectPeripheral peripheral: CBPeripheral, error: Error?) {
central.scanForPeripherals(withServices: nil, options: nil)
}
//callback for connecting to a central, didconnect was the autocomplete word
//discovr services
func centralManager(_ central: CBCentralManager, didConnect peripheral: CBPeripheral) {
print("connected \(peripheral.name)")
peripheral.discoverServices(nil)
peripheral.delegate = self
}
//callback for diddiscover services: auto complete: diddiscover
//for each of the services in my peripheral, print out the UUID
//may not need this funciton, need to check
func peripheral(_ peripheral: CBPeripheral, didDiscoverServices error: Error?) {
//optionally binding it
if let services = peripheral.services {
for svc in services {
print(svc.uuid.uuidString)
}
}
}
//! is used to unwrap it so anywhere in the code, it doesn't need to be unwrapped as an optional
var centralManager : CBCentralManager!
//keep a reference/store our peripheral
var myPeripheral : CBPeripheral?
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
//create instance of CBManager
//pass in self as the delegate to handle any callbacks
centralManager = CBCentralManager.init(delegate: self, queue: nil)
}