Bluetooth Low Energy Flutter Package

This package provides the following features:

Central
- Discover peripherals and their services and charactersitics
  - Read values from characteristics
  - Connect to peripherals
  - Establish L2CAP COC connections over discovered/known PSMs.
  - Multiplex L2CAP COCs into sockets.
Peripheral
- Advertise read-only, string based services and charactersitics
  - Publish L2CAP COC connections.
  - Multiplex L2CAP COCs into sockets.

Getting started

Make sure your project meets the minimum requirements:

Minimum iOS target: 13.0
Minimum Android SDK: 29
Kotlin version: 1.7.10

Installation

flutter pub add blev

Upgrading

flutter pub upgrade blev

iOS Permissions

Update Info.plist

If you are building for Apple platforms, you may have to update your app's Info.plist. NSBluetoothAlwaysUsageDescription is needed to utilize bluetooth.

<key>NSBluetoothAlwaysUsageDescription</key>
<string></string>

Android Permissions

See https://developer.android.com/develop/connectivity/bluetooth/bt-permissions for how to correctly declare and request permissions for Android devices you intend on supporting.

Usage and example apps

View example apps in the /example directory to learn how to best use this package. There are two combined examples:

central and peripheral
- Demonstrates a central and peripheral sending messages to each over L2CAP channels.
central_socks_client and peripheral_socks_server
- Demonstrates a central and peripheral acting as a client and server for doing HTTP over SOCKS5.

GitHub

You can view the code for Flutter BLE on GitHub.

Original Credit

This project took learnings from https://github.com/appsfactorygmbh/flutter-l2cap and as such references its MIT LICENSE at the bottom of our Apache 2.0 LICENSE.

License

Apache 2.0 - See LICENSE file