I just checked the data sheet of the LinkUSB and it does not have a
1-wire chip at all but rather emulates the DS2480 - here an excerpt:
DS2480B/9097U Emulation
The LinkUSBTM is programmed to closely emulate a Dallas DS2480B serial
port to
1-Wire line driver so that existing software can use it without
modification. (The
DS2480B is the basis for the Dallas DS9097 series of 1-Wire adapters.)
This allows the
LinkUSBTM to be used in place of the Dallas DS2480B in most cases where
increased
performance or reliability is required. Some DS2480B functions are not
emulated by the
LinkUSBTM, as described below.
On 09/29/2013 11:22 AM, Vajk Fekete wrote:
The key piece of information is, that ds9490 uses the ds2490 chip.
Which is kinda discontinued by dallas/maxim. At a point they stated
they have made a huge lot that will last years, and stopped
production. They may have restarted production, or are just keeping
price high enough to fulfill the prediction "stock will last for years"
Your best bet is to get any clone that uses the ds2480 chip and some
sort of usb serial port. As far as I know, the ds24080 is abou the
same functionality as the ds2490, just missing the native usb interface.
Hope the members with low level programming experience will
confirm/debate that the 2480 is same level as 2490.
all best,
Vajk
On Sun, Sep 29, 2013 at 9:18 AM, Martin Patzak (GMX)
<martin.pat...@gmx.de <mailto:martin.pat...@gmx.de>> wrote:
Bruce,
a Shop with a wide selection for 1-wire chips is:
http://www.fuchs-shop.com/en/shop/17/
I use the LinkUSB and I am very happy with it. I run a powered
network of about 15 temp-sensors and 3 IO-chips, which is driving
my home heating system.
Cheers
Martin
On 09/28/2013 07:37 PM, brucek wrote:
Well, I tracked down my ow network failure to the melted
DS9490R. It looks like it could have actually been a fire risk.
Anyway, I see new DS9490R's at Newark for $33.81 + s/h ($20 min),
and on eBay for $66.00 (really?)
I also see a Bulgarian one based on Chipset: FT232RL and DS2480B
with terminals for about $33 with shipping, and a Chinese one
USB9097 with 3.5mm TRS for $22.50 with shipping.
Anyone have any experience with these cheapo adaptors?
Bruce
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