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.

Properties

BluetoothRemoteGATTCharacteristic.serviceRead only

Returns the BluetoothRemoteGATTService this characteristic belongs to.

BluetoothRemoteGATTCharacteristic.uuidRead only

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

BluetoothRemoteGATTCharacteristic.propertiesRead only

Returns the properties of this characteristic.

BluetoothRemoteGATTCharacteristic.valueRead only

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

Methods

BluetoothRemoteGATTCharacteristic.getDescriptor()

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

BluetoothRemoteGATTCharacteristic.getDescriptors()

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

BluetoothRemoteGATTCharacteristic.readValue()

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)

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)

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)

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()

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

BluetoothRemoteGATTCharacteristic.stopNotifications()

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

Specifications

Specification
Web Bluetooth
# bluetoothgattcharacteristic-interface

Browser compatibility

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