Yoctopuce Yocto-RangeFinder, User Manual, Page: 171 / 497

21. High-level API Reference
YAPI YAPI.UpdateDeviceList_async()
yUpdateDeviceList_async()
Triggers a (re)detection of connected Yoctopuce modules.
js
function yUpdateDeviceList_async( callback , context )
The library searches the machines or USB ports previously registered using
yRegisterHub()
, and
invokes any user-defined callback function in case a change in the list of connected devices is
detected.
This function can be called as frequently as desired to refresh the device list and to make the
application aware of hot-plug events.
This asynchronous version exists only in Javascript. It uses a callback instead of a return value in order
to avoid blocking Firefox Javascript VM that does not implement context switching during blocking I/O
calls.
Parameters :
callback callback function that is invoked when the result is known. The callback function receives three
arguments: the caller-specific context object, the result code (
YAPI_SUCCESS if the operation
completes successfully) and the error message.
context caller-specific object that is passed as-is to the callback function
Returns :
nothing : the result is provided to the callback.
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