BluetoothRemoteGATTCharacteristic

Limited availabilitySecure context

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.

Instance properties

• service Read only Experimental
  • : Returns the BluetoothRemoteGATTService this characteristic belongs to.
• 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.
• properties Read only Experimental
  • : Returns the properties of this characteristic.
• 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.

Instance methods

• getDescriptor() Experimental
  • : Returns a Promise that resolves to the first BluetoothRemoteGATTDescriptor for a given descriptor UUID.
• getDescriptors() Experimental
  • : Returns a Promise that resolves to an Array of all BluetoothRemoteGATTDescriptor objects for a given descriptor UUID.
• readValue() Experimental
  • : Returns a Promise that resolves to a DataView holding a duplicate of the value property if it is available and supported. Otherwise it throws an error.
• writeValue() Deprecated
  • : Sets the value property to the bytes contained in a given ArrayBuffer, writes the characteristic value with optional response, and returns the resulting Promise.
• writeValueWithResponse() Experimental
  • : Sets the value property to the bytes contained in a given ArrayBuffer, writes the characteristic value with required response, and returns the resulting Promise.
• writeValueWithoutResponse() Experimental
  • : Sets the value property to the bytes contained in a given ArrayBuffer, writes the characteristic value without response, and returns the resulting Promise.
• startNotifications() Experimental
  • : Returns a Promise that resolves when navigator.bluetooth is added to the active notification context.
• stopNotifications() Experimental
  • : Returns a Promise that resolves when navigator.bluetooth is removed from the active notification context.

Events

• characteristicvaluechanged Experimental
  • : Fired on a BluetoothRemoteGATTCharacteristic when its value changes.

Specifications

Browser compatibility