MDN wants to learn about developers like you:



This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

The BluetoothRemoteGATTCharacteristic.writeValue() method sets the value property to the bytes contained in an ArrayBuffer and returns a Promise.


BluetoothRemoteGATTCharacteristic.writeValue(value).then(function() { ... })


A Promise.


An ArrayBuffer


Specification Status Comment
Web Bluetooth
The definition of 'writeValue()' in that specification.
Draft Initial definition.

Browser Compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support 45.0 [1] ? ? ? ?
Feature Android Android Webview Firefox Mobile (Gecko) Firefox OS IE Mobile Opera Mobile Safari Mobile Chrome for Android
Basic support Not supported Not supported ? ? ? ? ? 48.0 [2]

[1] Behind a flag.  Chrome OS only.

[2] Behind a flag. Requires Android 6 (Marshmallow).

Document Tags and Contributors

 Contributors to this page: rolfedh, jpmedley
 Last updated by: rolfedh,