Re: Getting variable value from xPL_HomeVision from xPL script...

[Andrew Kilgore <andrew.kilgore@xxxxxxxxx>]

John et al.,

Thank you for your replies...
I did figure that I could do it with 2 determinators but wasn't sure
whether that was the only/correct way... I will probably need a little
bit of scripting as I only want to perform certain actions if the
variable is one of a number of values (e.g. 0, 5, 15, 30, 45)...

Many thanks,
Andy.

On 5/24/05, John B <home-automation@xxxxxxx> wrote:
> Hi Andy,
>
> Apologies for not responding - I know very little about HV... But I'll
> do my best to help ;-)
>
> > The conditions of the determinator is that a specific
> > periodic event fired...
> > The actions are to execute a script which will query HV for a
> > specific variable value send that value out in an osd.basic
message...
>
> The problem here is that all xPL operations within xPLHal are
> asynchronous.
> There is no notion of sending out a message (requesting the value of a
> variable) and waiting for a reply.
>
> You can achieve this by using two determinators (I don't think you
need
> to write any scripts):
>
> Your first determinator needs to look for the periodic event from HV
as
> it's input condition.
> As it's action, it needs to request the value of the variable from HV.
>
> Then, create a second determinator:
> As it's input condition, detect a change in the variable from HV.
> For it's action, display the value of the variable, or store it in an
> xPLHal global - or basically do whatever you want with it.
>
> So, the flow of activity will go something like:
>
> 1. HV fires periodic event.
> 2. Determinator 1 detects the event, and fires. It requests the value
of
> the Immersion variable from HV.
> 3. HV sends out the value of the Immersion variable in response to the
> request.
> 4. Determinator 2 detects this variable and fires. The actions of this
> determinator display the value of the variable on an OSD device.
>
> Hopefully that gives you some pointers as to how you can achieve what
> you want.
> If it isn't clear, just shout and I'll go through it step-by-step here
> (wel, as far as I can without access to HV) and give you some more
> detailed instructions.
>
> Steve C is the man to ask about the xPL HV stuff - but he's not around
> at the moment.
>
> Regards,
>
> John
>
>
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