Paul,
I would like to +1 this ability. I have a couple buses that have more
sensors than I would like because of physical limitations. I have
regular stability problems with simultaneous reads. After reading this,
I suspect that I am at the limit of the power available on the these
buses for
Which physical interface? Typically DS2483s, sometimes DS9490, and also
the LinkUSB, although I've only so far used the LinkUSB on my Windows
boxes with LabVIEW and ibfs64.dll and the TMEX API.
If you meant which interface abstraction, I mount owfs to owserver.
Colin
On 7/11/2014 10:37, Paul
What interface do you you use for these reads? We could make owread (or the
owcapi interface) multithreaded.
On Fri, Jul 11, 2014 at 1:27 PM, Colin Reese wrote:
> Hi Paul,
>
> Thanks for the detailed response.
>
> Yes, the concern is power draw. We find that converting groups of
> sensors simul
Hi Paul,
Thanks for the detailed response.
Yes, the concern is power draw. We find that converting groups of
sensors simultaneously by ROM actually scales quite well. Using the TMEX
API, you can easily issue a Skip ROM (xCC) followed by a Convert Temp
(x44) to convert all devices simultaneousl
Am 10.07.2014 03:29, schrieb Loren Amelang:
> Except I ended up with a 10K resistor in parallel with the suggested
> 4.7K pullup, for 3197 ohms, before I actually got real readings.
>
This stinks the way the strong pullup is missing during temperature
conversion. See e.g. the DS18B20 datasheet, pa
Hi Colin,
I wonder if OWFS can already do what you want. If not, I have some ideas.
OWFS has a "simultaneous" command to trigger temperature conversion.
1. It works on all the sensors on a bus, using the trick that there is a
command to select the single slave on a 1-slave bus (for efficiency) b
---
configure.ac| 19 +++
src/scripts/Makefile.am | 2 +-
src/scripts/systemd/Makefile.am | 16
src/scripts/systemd/owfs.service| 13 -
src/scripts/systemd/owfs.service.in | 13 +++
---
src/scripts/systemd/owserver.service.in | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/src/scripts/systemd/owserver.service.in
b/src/scripts/systemd/owserver.service.in
index 9e6f691..e65c67b 100644
--- a/src/scripts/systemd/owserver.service.in
+++ b/src/scripts/systemd
adjust requires in other units - explicit owserver dependency is not needed,
as owserver will be socket-activated
---
src/scripts/systemd/Makefile.am | 3 ++-
src/scripts/systemd/owfs.service.in | 2 --
src/scripts/systemd/owftpd.service.in | 2 --
src/scripts/systemd/owhttpd.service
Hi,
I've tested you implementation. owserver is started by systemd when
for example owget tries to connect - great! I'm sending three patches,
first updates autotools machinery to use proper --prefix in units and
copy the units during "make install".
second adds unit for socket activation and
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