watcher

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Watch for USB device connection/disconnection events
API Overview
Constructors - API calls which return an object, typically one that offers API methods
​new​
Methods - API calls which can only be made on an object returned by a constructor
​start​
​stop​
API Documentation
Constructors
​new​
Signature
hs.usb.watcher.new(fn) -> watcher
Type
Constructor
Description
Creates a new watcher for USB device events
Parameters
fn - A function that will be called when a USB device is inserted or removed. The function should accept a single parameter, which is a table containing the following keys:
eventType - A string containing either "added" or "removed" depending on whether the USB device was connected or disconnected
productName - A string containing the name of the device
vendorName - A string containing the name of the device vendor
vendorID - A number containing the Vendor ID of the device
productID - A number containing the Product ID of the device
Returns
A hs.usb.watcher object
Methods
​start​
Signature
hs.usb.watcher:start() -> watcher
Type
Method
Description
Starts the USB watcher
Parameters
None
Returns
The hs.usb.watcher object
​stop​
Signature
hs.usb.watcher:stop() -> watcher
Type
Method
Description
Stops the USB watcher
Parameters
None
Returns
The hs.usb.watcher object