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On 20.06.2012 03:37, Paul Alfille wrote:
> Yes, the presence pulse can disrupt communication. That's one of
> the reasons there is a built-in retry in owfs for read and write,
> and very conservative settings for checking checksums and verifying
> writ
Yes, the presence pulse can disrupt communication. That's one of the
reasons there is a built-in retry in owfs for read and write, and very
conservative settings for checking checksums and verifying writes.
As I read it, the presence pulse makes more sense in a microprocessor-based
system (like an
There is a way for slaves to announce their presence on the bus by providing a
presence pulse when
they are powered up. I'm not sure if all slaves to this or just some (or all)
of the iButtons. Also
I don't know which masters or software supports this, it is mainly used for
things like door loc
On 06/18/2012 02:57 PM, Eric Vickery wrote:
> On 6/16/2012 3:27 PM, Eloy Paris wrote:
>> Hi Phil,
>>
>> On 06/16/2012 07:43 AM, Phil White wrote:
>>
>>> On 13 June 2012 02:01, Eloy Pariswrote:
>>>
All 1-Wire devices have this "presence pulse" feature that you mention
-- that's a fund
On 6/16/2012 3:27 PM, Eloy Paris wrote:
> Hi Phil,
>
> On 06/16/2012 07:43 AM, Phil White wrote:
>
>> On 13 June 2012 02:01, Eloy Paris wrote:
>>
>>> All 1-Wire devices have this "presence pulse" feature that you mention
>>> -- that's a fundamental part of the protocol, and all slave devices ne
Hi Phil,
On 06/18/2012 02:08 PM, Phil White wrote:
> Hello Elroy,
>
> Thanks for the reply.
>
> On 16 June 2012 21:27, Eloy Paris wrote:
>> <... snip ...>
>> but after seeing your
>> comment that my statement above is incorrect, I read the datasheets...
>
> Oh! Please don't interpret my comment
Hello Elroy,
Thanks for the reply.
On 16 June 2012 21:27, Eloy Paris wrote:
> <... snip ...>
> but after seeing your
> comment that my statement above is incorrect, I read the datasheets...
Oh! Please don't interpret my comment as a statement that you are wrong!
It was simply referencing what I
Hi Phil,
On 06/16/2012 07:43 AM, Phil White wrote:
> On 13 June 2012 02:01, Eloy Paris wrote:
>
>> All 1-Wire devices have this "presence pulse" feature that you mention
>> -- that's a fundamental part of the protocol, and all slave devices need
>> to generate a presence pulse right after they d
W dniu 16.06.2012 o 13:43 Phil White pisze:
> As a side example, I have seen circuits using a DS2408 as a keypad
> input. Although I don't intend to implement this (directly), I am
> bemused as to how it works, bearing in mind I would only press each
> button for a fraction of a second in quick s
Hello All,
Thanks for the replies. (Sorry for any delay in replying - I only
logon at intervals).
Everything so far is as I understood it. My problem is that I don't
actually understand it properly - but because I am at the point of
designing a new system, I need to.
On 13 June 2012 02:01, Eloy
Hi Roberto,
On 06/12/2012 09:21 PM, Roberto Spadim wrote:
> i don´t know if this exists but... in advantech and others rs485
> modules, exists a sincronous read mode, where you send a command to all
> slaves and they save the value into the memory
> after a time you can get all slave values
This
Phil,
As has been said, there is no true alarm interrupt. There are some chips
that can have high and low alarms and a polling mode that only sees
alarmed sensors.
Still, it is not worth it for me. The cost of doing the actual polling
for 30 sensors is fairly low if you first send a simultaneo
i don´t know if this exists but... in advantech and others rs485 modules,
exists a sincronous read mode, where you send a command to all slaves and
they save the value into the memory
after a time you can get all slave values
for example in a ds18b20 you will need 1 second to convert temperature
we
Hi Phil,
On 06/12/2012 08:36 PM, Phil White wrote:
> Hi All,
>
> This may, or may not, be applicable to this list. However, I am hoping
> that someone here knows enough about MicroLAN to be able to clarify
> something for me.
>
> Up to know, all my sensors have been polled. Simplistically speakin
Hi All,
This may, or may not, be applicable to this list. However, I am hoping
that someone here knows enough about MicroLAN to be able to clarify
something for me.
Up to know, all my sensors have been polled. Simplistically speaking,
the PC asks "What is the temperature now?"
What I am ponderin
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