Re: Re: Simat 1 wire Hubs

["Frank Mc Alinden" <frankmc@xxxxxxxxxxxxxxxx>]

Hi Jon

> I'm going to look at optimising the temperature gathering now by
grouping
> sensors by path(location on branches), which will also apply to polled
> sensors in general, and by starting >temperature conversion off
> simultaneously (which I've only just realised can be done) for all
>  >sensors on that path, then fetching their readings

Let us know how this goes ....

Frank
----- Original Message -----
From: "Jon Payne" <jgpayne@xxxxxxx>
To: <ukha_d@xxxxxxx>
Sent: Wednesday, May 23, 2007 5:21 PM
Subject: Re: [ukha_d] Re: Simat 1 wire Hubs


> Great to know others are using 1-wire on UKHA!
>
> I have now speeded up my network scanning a little by using the DS2409
> SmartOn feature - this lets you determine whether there are /any/
devices
> on a branch without having to actually scan it which obviously saves
time
> if a branch is unused or used for touch contact ibutton applications.
>
> I'm going to look at optimising the temperature gathering now by
grouping
> sensors by path (location on branches), which will also apply to
polled
> sensors in general, and by starting temperature conversion off
> simultaneously (which I've only just realised can be done) for all
sensors
> on that path, then fetching their readings.
>
> cheers,
> jon
>
>
> ----- Original Message ----
> From: Frank Mc Alinden <frankmc@xxxxxxx>
> To: ukha_d@xxxxxxx
> Sent: Wednesday, 23 May, 2007 7:49:12 AM
> Subject: Re: [ukha_d] Re: Simat 1 wire Hubs
>
>
> Hi Mark / Jon
>
>> Sort of - as I understand it, it does a startup scan to detect new
>> devices and adds them to the database of connected devices. It
will
>> then scan for devices in the database so if a device has been
>> connected at any startup it should then be scanned for. However, I
>> think the new hub code breaks this in that the hub branch number
is
>> remembered at startup and the devices are only searched for on
that
>> branch.
>
> That appears to be the case from my observations as well....
>
>> Nice to see some 1-wire discussion here, I'm just getting into it
and
>> going through the opnode sorce code has helped a lot but it's good
to
>> hear of other ways of doing things.
>
> Keep us posted on your progress
>
> Frank
>
>
>
>
>