Key Down

Press keyboard key (without releasing).

Interface Description

Interface Type

keyDown

Parameters

Parameter	Type	Required	Default	Description
deviceId	string	✅	-	Device ID
key	string	✅	-	Key name

key Parameter Values

Supported function keys:

Key	Description	Example Use
RIGHT	Right arrow	Navigate right
LEFT	Left arrow	Navigate left
DOWN	Down arrow	Navigate down
UP	Up arrow	Navigate up
ENTER	Enter key	Confirm, line break
DEL	Delete key	Delete content
BACKSPACE	Backspace key	Delete character
END	End key	Jump to end
HOME	Home key	Jump to beginning
PAGEDOWN	PageDown key	Page down
PAGEUP	PageUp key	Page up
ESC	Esc key	Cancel, exit
TAB	Tab key	Switch focus
CTRL	Ctrl key	Control key (combination)
SHIFT	Shift key	Shift key (combination)
ALT	Alt key	Alt key (combination)
COMMAND	Command key	macOS combination key
F1 - F12	Function keys	System function shortcuts

💡 Letter and Number Keys

For letter keys (A-Z) and number keys (0-9), use the sendKey interface, which automatically handles press and release.

Return Value

true  // Returns true on successful operation

Basic Usage

// Press Enter key
await apiInvoke('keyDown', {
    deviceId: 'P72578581E07',
    key: 'ENTER'
});

// Note: Must be used with keyUp
await apiInvoke('keyUp', {
    deviceId: 'P72578581E07',
    key: 'ENTER'
});