cordova-plugin-bluetooth-classic-serial-port
Advanced tools
Cordova Bluetooth Serial Port Profile Communication Plugin
This plugin enables serial communication over Bluetooth. It is a fork of https://github.com/don/BluetoothSerial and https://github.com/soltius/BluetoothClassicSerial.
The core difference is that https://github.com/don/BluetoothSerial supports Bluetooth Low Energy on iOS.
This plugin is written using the iOS Accessory Framework (MFi) to support Classic Bluetooth on iOS.
Android applications will continue to receive notification while the application is in the background.
iOS applications need additional configuration to allow Bluetooth to run in the background.
Add a new section to config.xml
<platform name="ios">
<config-file parent="UIBackgroundModes" target="*-Info.plist">
<array>
<string>external-accessory</string>
</array>
</config-file>
</platform>
See Documentation .
Install with Cordova cli
$ cordova plugin add cordova-plugin-bluetooth-classic-serial-port
$ cordova plugin add https://github.com/MaximBelov/cordova-plugin-bluetooth-classic-serial-port.git
Install with Ionic
$ ionic cordova plugin add cordova-plugin-bluetooth-classic-serial-port
Note that this plugin's id changed from 'cordova-plugin-bluetooth-serial' to 'cordova-plugin-bluetooth-classic-serial-port' as part of the fork.
All variables can be modified after installation by updating the values in package.json.
BLUETOOTH_USAGE_DESCRIPTION: [iOS] defines the values for NSBluetoothAlwaysUsageDescription.
IOS_INIT_ON_LOAD: [iOS] Prevents the Bluetooth plugin from being initialised until first access to the bluetoothClassicSerial window object. This allows an application to warn the user before the Bluetooth access permission is requested.
To include the default set of permissions the plugin installs on Android SDK v33+, add the following snippet in your config.xml file, in the <platform name="android"> section:
<config-file target="AndroidManifest.xml" parent="/manifest">
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" android:maxSdkVersion="28" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" android:maxSdkVersion="34" />
<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="33" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" android:maxSdkVersion="33" />
</config-file>
For the best understanding about which permissions are needed for which combinations of target SDK version & OS version, see Android Bluetooth permissions
$ npm i @awesome-cordova-plugins/bluetooth-classic-serial-port
iOS requires that the device's protocol string is in the p-list.
Replace the text 'first.device.protocol.string' with the protocol string for the Bluetooth accessory you are connecting to.
Create a new line for each protocol string.
Some devices may have more than one.
The plugin only allows for connection to one device and one protocol.
If you need to connect to another, disconnect, then connect to the required device and protocol.
<platform name="ios">
<config-file target="*-Info.plist" parent="UISupportedExternalAccessoryProtocols">
<array>
<string>first.device.protocol.string</string>
<string>second.device.protocol.string</string>
</array>
</config-file>
</platform>
Connect to a Bluetooth device.
bluetoothClassicSerial.connect(deviceId, interfaceIdArray, connectSuccess, connectFailure);
Function connect connects to a Bluetooth device. The callback is long running. Success will be called when the connection is successful. Failure is called if the connection fails, or later if the connection disconnects. An error message is passed to the failure callback.
If a device has multiple interfaces then you can connect to them by providing the interface Ids.
For iOS, connect takes the ConnectionID as the deviceID, and the Protocol String as the interfaceId.
Connect insecurely to a Bluetooth device.
bluetoothClassicSerial.connectInsecure(deviceId, interfaceIdArray, connectSuccess, connectFailure);
Function connectInsecure works like connect, but creates an insecure connection to a Bluetooth device. See the Android docs for more information.
For Android, see connect.
connectInsecure is not supported.
bluetoothClassicSerial.disconnect(success, failure);
Function disconnect disconnects the current connection.
Writes data to the serial port.
bluetoothClassicSerial.write(interfaceId, data, success, failure);
Function write data to the serial port. Data can be an ArrayBuffer, string, array of integers, or a Uint8Array.
Internally string, integer array, and Uint8Array are converted to an ArrayBuffer. String conversion assume 8bit characters.
// string
bluetoothClassicSerial.write("00001101-0000-1000-8000-00805F9B34FB", "hello, world", success, failure);
// array of int (or bytes)
bluetoothClassicSerial.write("00001101-0000-1000-8000-00805F9B34FB", [186, 220, 222], success, failure);
// Typed Array
var data = new Uint8Array(4);
data[0] = 0x41;
data[1] = 0x42;
data[2] = 0x43;
data[3] = 0x44;
bluetoothClassicSerial.write(interfaceId, data, success, failure);
// Array Buffer
bluetoothClassicSerial.write(interfaceId, data.buffer, success, failure);
Gets the number of bytes of data available.
bluetoothClassicSerial.available(interfaceId, success, failure);
Function available gets the number of bytes of data available. The bytes are passed as a parameter to the success callback.
available is not supported.
bluetoothClassicSerial.available("00001101-0000-1000-8000-00805F9B34FB", function (numBytes) { console.log("There are " + numBytes + " available to read."); }, failure);
Reads data from the buffer.
bluetoothClassicSerial.read(interfaceId, success, failure);
Function read reads the data from the buffer. The data is passed to the success callback as a String. Calling read when no data is available will pass an empty String to the callback.
bluetoothClassicSerial.read("00001101-0000-1000-8000-00805F9B34FB", function (data) { console.log(data);}, failure);
Reads data from the buffer until it reaches a delimiter.
bluetoothClassicSerial.readUntil(interfaceId, '\n', success, failure);
Function readUntil reads the data from the buffer until it reaches a delimiter. The data is passed to the success callback as a String. If the buffer does not contain the delimiter, an empty String is passed to the callback. Calling read when no data is available will pass an empty String to the callback.
bluetoothClassicSerial.readUntil("00001101-0000-1000-8000-00805F9B34FB", '\n', function (data) {console.log(data);}, failure);
Subscribe to be notified when data is received.
bluetoothClassicSerial.subscribe(interfaceId, '\n', success, failure);
Function subscribe registers a callback that is called when data is received. A delimiter must be specified. The callback is called with the data as soon as the delimiter string is read. The callback is a long running callback and will exist until unsubscribe is called.
// the success callback is called whenever data is received
bluetoothClassicSerial.subscribe("00:AA:DD:DD:1A:2D", '\n', function (data) {
console.log(data);
}, failure);
Unsubscribe from a subscription.
bluetoothClassicSerial.unsubscribe(interfaceId, success, failure);
Function unsubscribe removes any notification added by subscribe and kills the callback.
bluetoothClassicSerial.unsubscribe();
Subscribe to be notified when data is received.
bluetoothClassicSerial.subscribeRawData(interfaceId, success, failure);
Function subscribeRawData registers a callback that is called when data is received. The callback is called immediately when data is received. The data is sent to callback as an ArrayBuffer. The callback is a long running callback and will exist until unsubscribeRawData is called.
// the success callback is called whenever data is received
bluetoothClassicSerial.subscribeRawData(function (data) {
var bytes = new Uint8Array(data);
console.log(bytes);
}, failure);
Unsubscribe from a subscription.
bluetoothClassicSerial.unsubscribeRawData(interfaceId, success, failure);
Function unsubscribeRawData removes any notification added by subscribeRawData and kills the callback.
bluetoothClassicSerial.unsubscribeRawData("00001101-0000-1000-8000-00805F9B34FB");
Clears data in the buffer.
bluetoothClassicSerial.clear(interfaceId, success, failure);
Function clear removes any data from the receive buffer.
Lists bonded devices
bluetoothClassicSerial.list(success, failure);
Function list lists the paired Bluetooth devices. The success callback is called with a list of objects.
Example list passed to success callback. See BluetoothDevice and BluetoothClass#getDeviceClass.
[{
"class": 276,
"id": "10:BF:48:CB:00:00",
"address": "10:BF:48:CB:00:00",
"name": "Nexus 7"
}, {
"class": 7936,
"id": "00:06:66:4D:00:00",
"address": "00:06:66:4D:00:00",
"name": "RN42"
}]
Function list lists the paired Bluetooth devices. The success callback is called with a list of objects.
Example list passed to success callback for iOS.
TBC
id is the generic name for connection Id or [mac]address so that code can be platform independent.
bluetoothClassicSerial.list(function(devices) {
devices.forEach(function(device) {
console.log(device.id);
})
}, failure);
Reports the connection status. If all interfaces are connected then the success callback is called. If one interface is not connected then the failure callback is called. The connect method does not allow the status of a single interface to be determined (unless you have only specified a single interfaceId in the prior connect method).
bluetoothClassicSerial.isConnected(success, failure);
Function isConnected calls the success callback when connected to a peer and the failure callback when not connected.
bluetoothClassicSerial.isConnected(
function() {
console.log("Bluetooth is connected");
},
function() {
console.log("Bluetooth is *not* connected");
}
);
Reports if bluetooth is enabled.
bluetoothClassicSerial.isEnabled(success, failure);
Function isEnabled calls the success callback when bluetooth is enabled and the failure callback when bluetooth is not enabled.
bluetoothClassicSerial.isEnabled(
function() {
console.log("Bluetooth is enabled");
},
function() {
console.log("Bluetooth is *not* enabled");
}
);
Show the Bluetooth settings on the device.
bluetoothClassicSerial.showBluetoothSettings(success, failure);
Function showBluetoothSettings opens the Bluetooth settings on the operating systems.
showBluetoothSettings is not supported.
bluetoothClassicSerial.showBluetoothSettings();
Enable Bluetooth on the device.
bluetoothClassicSerial.enable(success, failure);
Function enable prompts the user to enable Bluetooth. If enable is called when Bluetooth is already enabled, the user will not prompted and the success callback will be invoked.
enable is not supported.
enable is only supported on Android and does not work on iOS.
If enable is called when Bluetooth is already enabled, the user will not prompted and the success callback will be invoked.
bluetoothClassicSerial.enable(
function() {
console.log("Bluetooth is enabled");
},
function() {
console.log("The user did *not* enable Bluetooth");
}
);
Discover unpaired devices
bluetoothClassicSerial.discoverUnpaired(success, failure);
The behaviour of this method varies between Android and iOS.
Function discoverUnpaired discovers unpaired Bluetooth devices. The success callback is called with a list of objects similar to list, or an empty list if no unpaired devices are found.
Example list passed to success callback.
[{
"class": 276,
"id": "10:BF:48:CB:00:00",
"address": "10:BF:48:CB:00:00",
"name": "Nexus 7"
}, {
"class": 7936,
"id": "00:06:66:4D:00:00",
"address": "00:06:66:4D:00:00",
"name": "RN42"
}]
The discovery process takes a while to happen. You can register notify callback with setDeviceDiscoveredListener. You may also want to show a progress indicator while waiting for the discover process to finish, and the success callback to be invoked.
Calling connect on an unpaired Bluetooth device should begin the Android pairing process.
Function discoverUnpaired will launch a native iOS window showing all devices which match the protocol string defined in the application's cordova config.xml file. Choosing a device from the list will initiate pairing and the details of that device will not trigger the success callback function. The device discovered listener must be used. Once paired the device is available for connection.
bluetoothClassicSerial.discoverUnpaired(function(devices) {
devices.forEach(function(device) {
console.log(device.id);
})
}, failure);
Register a notify callback function to be called during bluetooth device discovery.
Register a notify callback function to be called during bluetooth device discovery. For callback to work, discovery process must be started with discoverUnpaired. There can be only one registered callback.
Example object passed to notify callback.
{
"class": 276,
"id": "10:BF:48:CB:00:00",
"address": "10:BF:48:CB:00:00",
"name": "Nexus 7"
}
When a device is paired from the discoverUnpaired function it's details will be passed to the callback function. Unlike Android this will only be fired once for the selected device, not for all the available devices.
bluetoothClassicSerial.setDeviceDiscoveredListener(function(device) {
console.log('Found: ',device.id);
});
Clears notify callback function registered with setDeviceDiscoveredListener.
bluetoothClassicSerial.clearDeviceDiscoveredListener();
Development Devices include
Development Devices include
This project is a fork of Don Coleman's https://github.com/don/BluetoothSerial so all the big props to him.
The multi interface implementation for Android borrowed ideas from Shikoruma's pull request https://github.com/don/BluetoothSerial/pull/205 to Don Coleman's Cordova BluetoothSerial Plugin.
Most of the Bluetooth implementation was borrowed from the Bluetooth Chat example in the Android SDK.
The API for available, read, readUntil was influenced by the BtSerial Library for Processing for Arduino
If you need generic Bluetooth Low Energy support checkout Don Colemans's Cordova BLE Plugin.
If you need BLE for RFduino checkout Don Colemans's RFduino Plugin.
For Windows Phone 8 support see the original project, Don Coleman's Cordova BluetoothSerial Plugin
An example a properly formatted mac address is "AA:BB:CC:DD:EE:FF"
Try the code. If you find an problem or missing feature, file an issue or create a pull request.
FAQs
Cordova Bluetooth Serial Port Profile Communication Plugin
The npm package cordova-plugin-bluetooth-classic-serial-port receives a total of 189 weekly downloads. As such, cordova-plugin-bluetooth-classic-serial-port popularity was classified as not popular.
We found that cordova-plugin-bluetooth-classic-serial-port demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 0 open source maintainers collaborating on the project.
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