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initiates asynchronous execution of the specified command on a device, calling the handler function fun when an event occurs.

executes the command with the parameters params.


  • A device can be specified either by a DeviceObject or by a string representing a device class.
  • DeviceExecuteAsynchronous is a non-blocking function that returns an AsynchronousTaskObject.
  • The parameters params can be given either as a list of raw parameters or as an association or list of rules giving names and values of parameters.
  • The form in which specifications of events are fed to the handler function varies from one device to another.

ExamplesExamplesopen allclose all

Basic Examples  (1)Basic Examples  (1)

Asynchronously read from a demo device that retrieves cookies from a specified URL, calling URLFetchAsynchronous in the background:

Click for copyable input
Click for copyable input

The retrieved cookies:

Click for copyable input
Introduced in 2014
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