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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.
A note on iOS
This plugin is currently only compatible with Android. iOS does not provide a similar interface for
Bluetooth Classic like Android does. 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:
<uses-permission android:name="android.permission.BLUETOOTH_SCAN" android:usesPermissionFlags="neverForLocation" />
<uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />
<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" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" android:maxSdkVersion="28" />
With location access
In the android/app/src/main/AndroidManifest.xml add:
<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" />
<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_COARSE_LOCATION" android:maxSdkVersion="28" />
Then pass the accessFineLocation parameter when initializing the plugin:
final blueClassic = FlutterBlueClassic(usesFineLocation: true);
Reference
FlutterBlueClassic
|
Description |
| isSupported |
Checks whether the device supports Bluetooth |
| isEnabled |
Checks whether Bluetooth is enabled |
| adapterStateNow |
Current state of the bluetooth adapter |
| adapterState |
Stream of on, off and intermediary states of the bluetooth adapter |
| bondedDevices |
Returns the list of bonded (paired) devices |
| startScan |
Starts a scan for Bluetooth devices |
| stopScan |
Stop an existing scan for Bluetooth devices |
| isScanningNow |
Checks whether the Bluetooth adapter is currently scanning. |
| isScanning |
Stream whether the device is scanning for BL devices. |
| scanResults |
Stream of found devices during scan |
| turnOn |
Requests to turn the bluetooth adapter on |
| bondDevice |
Requests to create a bond with a bluetooth device |
| connect |
Tries to connect with a bluetooth device |
BluetoothConnection
|
Description |
| input |
The stream of data received from the connected BL device |
| output |
A stream sink to send byte data to the connected BL device |
| writeString |
A helper to send utf-8 encoded strings to the remote device |
| isConnected |
Indicates whether the connection is still open. |
| dispose |
This should be called, when the Connection is no longer needed and will call finish (see below). |
| finish |
This will wait for any ongoing writes to be finished and gracefully close the connection. |
| close |
This will immediately close the connection. |
Acknowledgement
flutter_blue_classic is loosely based on flutter_bluetooth_serial.
