Hi Tony,
Have you tried FILE, instead of FILESYSTEM?
check file USB_Serial0 with path /dev/ttyUSB0
if not exist then alert
Cheers!
Phil
On Mon, 29 Jul 2019 at 06:58, Tony Eyles <[email protected]> wrote:
> Is there a way to check if a device is available?
> For example checking if a USB Serial device shown in the system as
> /dev/ttyUSB0 is actively seen by the system?
>
> I have tried
>
> # check for USB serial adaptor as USB0
> check filesystem USB_Serial0 path /dev/ttyUSB0
> if changed fsflags then alert
>
> and
>
> # check for USB serial adaptor as USB0
> check filesystem USB_Serial0 path /dev/ttyUSB0
> if not exist then alert
>
>
>
> Tony
>
