'Connecting to ev3dev on a LEGO EV3

Using iOS 12.2 Xcode 10.2.1

Looking to connect to this [a Debian based UNIX box] using iOS iPad.I can see the device on my laptop. As you can see here.

And I can see it on my iPhone. And I can pair it with my iPhone.

I can log into ev3dev and use the bluetoothctl command in the shell to show me the details of the service.

[bluetooth]# show 
Controller 40:BD:32:3E:56:97
  Name: ev3dev
  Alias: ev3dev
  Class: 0x020100
  Powered: yes
  Discoverable: yes
  Pairable: yes
  UUID: Generic Attribute Profile (00001801-0000-1000-8000-00805f9b34fb)
  UUID: NAP                       (00001116-0000-1000-8000-00805f9b34fb)
  UUID: A/V Remote Control        (0000110e-0000-1000-8000-00805f9b34fb)
  UUID: PnP Information           (00001200-0000-1000-8000-00805f9b34fb)
  UUID: Generic Access Profile    (00001800-0000-1000-8000-00805f9b34fb)
  UUID: A/V Remote Control Target (0000110c-0000-1000-8000-00805f9b34fb)
  Modalias: usb:v0694p0005d0316
  Discovering: no
 [CHG] Controller 40:BD:32:3E:56:97 Discoverable: no

But want to write a small app that can do so. New to bluetooth. I got this code, which seems to see everything except what I want to find.

import UIKit
import CoreBluetooth

class ViewController: UIViewController {

var manager:CBCentralManager!
var peripheral:CBPeripheral!

let X_NAME = "ev3dev"
let options: [String: Any] = [CBCentralManagerScanOptionAllowDuplicatesKey:
                          false]

 override func viewDidLoad() {
 super.viewDidLoad()
 manager = CBCentralManager(delegate: self, queue: nil)
 }
 }

extension ViewController: CBCentralManagerDelegate,
CBPeripheralDelegate {

  func centralManagerDidUpdateState(_ central: CBCentralManager) {

  if central.state == CBManagerState.poweredOn {
   central.scanForPeripherals(withServices: nil, options: options)
  } else {
   print("Bluetooth not available.")
 }
}

  func centralManager(_ central: CBCentralManager, didDiscover peripheral:     CBPeripheral, advertisementData: [String : Any], rssi RSSI: NSNumber) {
  let device = (advertisementData as NSDictionary)
  .object(forKey: CBAdvertisementDataLocalNameKey)
as? NSString

  print("Discovered \(peripheral.name ?? "")")

  if device?.contains(X_NAME) == true {
    self.manager.stopScan()
    self.peripheral = peripheral
    self.peripheral.delegate = self
    manager.connect(peripheral, options: nil)
    print("here")
 }
}
}

What am I missing here?

Don't know if it helps, but I tried these python scripts outlined in this webpage.

http://blog.kevindoran.co/bluetooth-programming-with-python-3/

They didn't work either, couldn't get python3 bluetooth installed under OS X and although both appeared to run on the Debian linux box. The client fails to connect to the server with the error message "No route to host".

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution	Source

'Connecting to ev3dev on a LEGO EV3

Sources

Related Questions