flutter_blue_classic

Flutter_blue_classic is a flutter plugin for communicating with bluetooth classic devices. If you want to use an Bluetooth low energy (BLE) device, you might want to consider flutter_blue_plus.

flutter_blue_classic

A note on iOS

This plugin is currently only compatible with Android. iOS does not provide a similar interface for Bluetooth Classic like Android. On iOS your BL device must be MFi (Made for iPod/iPhone) certified and you will have to use the External Accessory Framework. Since this is out of the scope of this package, you will have to implement this yourself.

Getting Started

minSdkVersion

This package is only compatible with Android SDK 21 or higher. Please set your minSdkVersion in the android/app/build.gradle accordingly.

Permissions

As the Android permission requirements can differ from case to case, this package does not define any permissions in it's Manifest. It is therefore necessary to declare them yourself. For detailed information, take a look at the Android Developer Documentation on Permissions.

Below are two common presets:

Without location access

In the android/app/src/main/AndroidManifest.xml add:

<!-- Permissions for Android 12 or above -->
<uses-permission android:name="android.permission.BLUETOOTH_SCAN" android:usesPermissionFlags="neverForLocation" />
<uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />

    <!-- legacy for Android 11 or lower -->
<uses-permission android:name="android.permission.BLUETOOTH" android:maxSdkVersion="30" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" android:maxSdkVersion="30" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" android:maxSdkVersion="30" />

    <!-- legacy for Android 9 or lower -->
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" android:maxSdkVersion="28" />

With location access

In the android/app/src/main/AndroidManifest.xml add:

<!-- Permissions for Android 12 or above -->
<uses-permission android:name="android.permission.BLUETOOTH_SCAN" />
<uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

    <!-- legacy for Android 11 or lower -->
<uses-permission android:name="android.permission.BLUETOOTH" android:maxSdkVersion="30" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" android:maxSdkVersion="30" />

    <!-- legacy for Android 9 or lower -->
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" android:maxSdkVersion="28" />

Then pass the accessFineLocation parameter when initializing the plugin:


final blueClassic = FlutterBlueClassic(usesFineLocation: true);

Reference