BluetoothRemoteGATTCharacteristic

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The BluetoothRemoteGattCharacteristic interface of the Web Bluetooth API represents a GATT Characteristic, which is a basic data element that provides further information about a peripheral's service.

EventTarget BluetoothRemoteGATTCharacteristic

Properties

BluetoothRemoteGATTCharacteristic.service Read only Experimental

Returns the BluetoothRemoteGATTService this characteristic belongs to.

BluetoothRemoteGATTCharacteristic.uuid Read only Experimental

Returns a string containing the UUID of the characteristic, for example '00002a37-0000-1000-8000-00805f9b34fb' for the Heart Rate Measurement characteristic.

BluetoothRemoteGATTCharacteristic.properties Read only Experimental

Returns the properties of this characteristic.

BluetoothRemoteGATTCharacteristic.value Read only Experimental

The currently cached characteristic value. This value gets updated when the value of the characteristic is read or updated via a notification or indication.

Events

oncharacteristicvaluechanged Experimental

Event handler for the characteristicvaluechanged event.

Methods

BluetoothRemoteGATTCharacteristic.getDescriptor() Experimental

Returns a Promise that resolves to the first BluetoothRemoteGATTDescriptor for a given descriptor UUID.

BluetoothRemoteGATTCharacteristic.getDescriptors() Experimental

Returns a Promise that resolves to an Array of all BluetoothRemoteGATTDescriptor objects for a given descriptor UUID.

BluetoothRemoteGATTCharacteristic.readValue() Experimental

Returns a Promise that resolves to an ArrayBuffer holding a duplicate of the value property if it is available and supported. Otherwise it throws an error.

BluetoothRemoteGATTCharacteristic.writeValue(value) Deprecated

Sets the value property to the bytes contained in a given ArrayBuffer, calls WriteCharacteristicValue(this=this, value=value, response="optional"), and returns the resulting Promise.

BluetoothRemoteGATTCharacteristic.writeValueWithResponse(value) Experimental

Sets the value property to the bytes contained in a given ArrayBuffer, calls WriteCharacteristicValue(this=this, value=value, response="required"), and returns the resulting Promise.

BluetoothRemoteGATTCharacteristic.writeValueWithoutResponse(value) Experimental

Sets the value property to the bytes contained in a given ArrayBuffer, calls WriteCharacteristicValue(this=this, value=value, response="never"), and returns the resulting Promise.

BluetoothRemoteGATTCharacteristic.startNotifications() Experimental

Returns a Promise when navigator.bluetooth is added to the active notification context.

BluetoothRemoteGATTCharacteristic.stopNotifications() Experimental

Returns a Promise when navigator.bluetooth is removed from the active notification context.

Specifications

Specification
Web Bluetooth
# bluetoothgattcharacteristic-interface

Browser compatibility

BCD tables only load in the browser