Digitemp with multiple sensors with pl2023 usb adaptors

[Jack Ostroff]

Hello all,

I have three sensors, connected by USB as /dev/ttyUSB0 (and 1 and 2).  digitemp can see them, but am I correct that only one sensor can be in an rc file?  I'd rather not have to have three separate files, and then run three separate instances, each specifying a separate rc file to monitor each sensor.

Feel free to point me to the approriate doc, if I've just missed it.

Thanks for any info.

[Dale Reagan]

Hi Jack,

I have 40+ sensors in mine...

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[Jack]

On 1/22/19 10:31 AM, Dale Reagan wrote:
> Hi Jack,
> I have 40+ sensors in mine...

Hi Dale,

Yes, but is each one on a different serial/USB port, or are they
multiple sensors on a single port.  I know digitemp handles the latter
easily, but I have the former, and when I do "digitemp -i" on the second
port, it just overwrites the rc file for the first, so unless I miss
something, I can have only one port per rc file, and digitemp only uses
one rc file per invocation.  I know I can create three separate rc
files, and then write a script to run digitemp against each
sequentially.  I was just hoping I didn't really need to do so.

Jack

[Dale Reagan]

Yep, I have single USB device.  Sounds like you will need 3 'runs' using the -c option for each USB device.

[Brian C. Lane]

On Mon, Jan 21, 2019 at 03:57:17PM -0800, Jack Ostroff wrote:
> Hello all,
>
> I have three sensors, connected by USB as /dev/ttyUSB0 (and 1 and 2).
> digitemp can see them, but am I correct that only one sensor can be in an
> rc file? I'd rather not have to have three separate files, and then run
> three separate instances, each specifying a separate rc file to monitor
> each sensor.

Why are you using 3 adapters? The 1-wire bus can handle multiple
sensors.

You will have to run it 3 times, pointing to a different config file for
each adapter, it's not designed to communicate with more than one at a
time.

Good luck!

--
http://www.brianlane.com

[Jack]

Hello Brian,

On 2019.01.22 23:36, Brian C. Lane wrote:
> On Mon, Jan 21, 2019 at 03:57:17PM -0800, Jack Ostroff wrote:
>> I have three sensors, connected by USB as /dev/ttyUSB0 (and 1 and
>> 2). digitemp can see them, but am I correct that only one sensor can
>> be in an rc file? I'd rather not have to have three separate files,
>> and then run three separate instances, each specifying a separate rc
>> file to monitor each sensor.
> Why are you using 3 adapters? The 1-wire bus can handle multiple
> sensors.

Because I didn't know much when I bought them on eBay, and I don't want
to build my own. If my little "experiment" works out, I may well look
for a different configuration.

> You will have to run it 3 times, pointing to a different config file
> for each adapter, it's not designed to communicate with more than one
> at a time.

That's what I was trying to confirm. I can imagine modifying the
config file to have a separate section for each adapter, but probably
not worth the effort.
>
> Good luck!
Thanks.

Jack