Abrevva Flutter Plugin

The EVVA Flutter Plugin is a collection of tools to work with electronical EVVA access components. It allows for scanning and connecting via BLE.

• Features
• Requirements
• Installation
• Examples

Features

• BLE Scanner for EVVA components in range
• Localize EVVA components encountered by a scan
• Disengage EVVA components encountered by a scan
• Read / Write data via BLE

Requirements

• Flutter >=3.3.0
• Java 17+ (Android)
• Android SDK (Android)
• Android 10+ (API level 29) (Android)
• Xcode 15.4 (iOS)
• iOS 15.0+ (iOS)

Installation

flutter pub add abrevva

iOS

Execute pod install inside of your projects ios/ folder.

Android

Perform a gradle sync.

Examples

Initialize and scan for EVVA components

To start off first import the abrevva Package

import 'package:abrevva/abrevva.dart';

async function scanForBleDevices(androidNeverForLocation: Boolean = true, timeout: Number) {
  await AbrevvaBle.initialize(androidNeverForLocation);

  AbrevvaBle.startScan(
    (scanResult: ScanResult) => {
      print("Discovered Device: ${scanResult.bleDevice.deviceId}");
    },
    (success: bool) => {
      print("onScanStart status=${success}");
    },
    (success: bool) => {
      print("onScanStop status=${success}");
    },
    null,  // macFilter
    false, // allowDuplicates
    10_000 // timeout
  );
}

Read EVVA component advertisement

Get the EVVA advertisement data from a scanned EVVA component.

final ad = device.advertisementData;
print(ad?.rssi);
print(ad?.isConnectable);

final md = ad?.manufacturerData;
print(md.batteryStatus);
print(md.isOnline);
print(md.officeModeEnabled);
print(md.officeModeActive);
// ...

There are several properties that can be accessed from the advertisement.

class BleDeviceAdvertisementData {
  int? rssi;
  bool? isConnectable;
  BleDeviceManufacturerData? manufacturerData;
  Map<String, dynamic>? rawData;
}

class BleDeviceManufacturerData {
  int? companyIdentifier;
  int? version;
  ComponentType? componentType;
  int? mainFirmwareVersionMajor;
  int? mainFirmwareVersionMinor;
  int? mainFirmwareVersionPatch;
  int? componentHAL;
  BatteryStatus? batteryStatus;
  bool? mainConstructionMode;
  bool? subConstructionMode;
  bool? isOnline;
  bool? officeModeEnabled;
  bool? twoFactorRequired;
  bool? officeModeActive;
  String? identifier;
  int? subFirmwareVersionMajor;
  int? subFirmwareVersionMinor;
  int? subFirmwareVersionPatch;
  String? subComponentIdentifier;
}

Localize EVVA component

With the signalize method you can localize EVVA components. On a successful signalization the component will emit a melody indicating its location.

final success = await AbrevvaBle.signalize('deviceId');

Perform disengage on EVVA components

For the component disengage you have to provide access credentials to the EVVA component. Those are generally acquired in the form of access media metadata from the Xesar software.

final status = await AbrevvaBle.disengage(
  'deviceId',
  'mobileId',
  'mobileDeviceKey',
  'mobileGroupId',
  'mobileAccessData',
  false,
);

There are several access status types upon attempting the component disengage.

enum DisengageStatusType {
  /// Component
  authorized, 
  authorizedPermanentDisengage, 
  authorizedPermanentEngage, 
  authorizedBatteryLow, 
  authorizedOffline, 
  unauthorized, 
  unauthorizedOffline, 
  signalLocalization, 
  mediumDefectOnline,
  mediumBlacklisted, 
  error,

  /// Interface
  unableToConnect,
  unableToSetNotifications,
  unableToReadChallenge,
  unableToWriteMDF,
  accessCipherError,
  bleAdapterDisabled,
  unknownDevice,
  unknownStatusCode,
  timeout,
}