I have it running, but I wonder if there is somewhere a config file, a
cron ..
How does it run

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zeneca wrote:

I have it running, but I wonder if there is somewhere a config file, a cron ..
How does it run

You have to have something that will scan your 1-wire bus, detect and read your temperatue sensor(s) ... no doubt something already exists that can run on a Pi

--- SoupGate-Win32 v1.05
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On 10/04/2022 11:30, Andy Burns wrote:

zeneca wrote:

I have it running, but I wonder if there is somewhere a config file, a
cron ..
How does it run

You have to have something that will scan your 1-wire bus, detect and
read your temperatue sensor(s) ... no doubt something already exists
that can run on a Pi

Try this:

#!/bin/bash

# get a list (array) of all devices
shopt -s nullglob
devices=(/sys/bus/w1/devices/w1_bus_master1/28*)
[ ${#devices[@]} -eq 0 ] && {
printf 'No device files found. Investigate.'
exit 1
}
shopt -u nullglob
printf '%s\n' "${devices[@]}"

while true; do # repeat forever
unset temp # new array
for d in ${!devices[@]}; do # for each device
unset t # new temperature value
# at odd times we get -015 for reading; ignore it
while [[ ! "$t" || "$t" -lt 0 ]]; do
# getting temp can take a couple of seconds
t=$(<"${devices[d]}/temperature") # get reading
done
p="${devices[d]##*-}" # probe serial number
# reading is in millidegrees
t=$(bc <<<"scale=3; $t/1000")
temp+=("P-$p ${t}") # now degrees
done
printf '%(%Y-%m-%d %H:%M:%S)T ' # date and time
printf '%s %1.3f ' ${temp[@]} # probe data
printf '\n' # newline
sleep 10
done



--
Chris Elvidge
England

--- SoupGate-Win32 v1.05
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Le 10/04/22 à 15:43, Chris Elvidge a écrit :

On 10/04/2022 11:30, Andy Burns wrote:

zeneca wrote:

I have it running, but I wonder if there is somewhere a config file,
a cron ..
How does it run

You have to have something that will scan your 1-wire bus, detect and
read your temperatue sensor(s) ... no doubt something already exists
that can run on a Pi

Try this:

#!/bin/bash

# get a list (array) of all devices
shopt -s nullglob
devices=(/sys/bus/w1/devices/w1_bus_master1/28*)
[ ${#devices[@]} -eq 0 ] && {
    printf 'No device files found. Investigate.'
    exit 1
}
shopt -u nullglob
printf '%s\n' "${devices[@]}"

while true; do  # repeat forever
    unset temp      # new array
    for d in ${!devices[@]}; do     # for each device
        unset t # new temperature value
        # at odd times we get -015 for reading; ignore it
        while [[ ! "$t" || "$t" -lt 0 ]]; do
            # getting temp can take a couple of seconds
            t=$(<"${devices[d]}/temperature") # get reading
        done
        p="${devices[d]##*-}"  # probe serial number
        # reading is in millidegrees
        t=$(bc <<<"scale=3; $t/1000")
        temp+=("P-$p ${t}") # now degrees
    done
    printf '%(%Y-%m-%d %H:%M:%S)T ' # date and time
    printf '%s %1.3f ' ${temp[@]}   # probe data
    printf '\n'                     # newline
    sleep 10
done

I have it running!!!!!!!!!!
My question is::::
how does it work, config file, cron job ..
I haven't found HOW it work.

--- SoupGate-Win32 v1.05
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On 11/04/2022 09:31, zeneca wrote:

Le 10/04/22 à 15:43, Chris Elvidge a écrit :

On 10/04/2022 11:30, Andy Burns wrote:

zeneca wrote:

I have it running, but I wonder if there is somewhere a config file,
a cron ..
How does it run

You have to have something that will scan your 1-wire bus, detect and
read your temperatue sensor(s) ... no doubt something already exists
that can run on a Pi

Try this:

#!/bin/bash

# get a list (array) of all devices
shopt -s nullglob
devices=(/sys/bus/w1/devices/w1_bus_master1/28*)
[ ${#devices[@]} -eq 0 ] && {
printf 'No device files found. Investigate.'
exit 1
}
shopt -u nullglob
printf '%s\n' "${devices[@]}"

while true; do # repeat forever
unset temp # new array
for d in ${!devices[@]}; do # for each device
unset t # new temperature value
# at odd times we get -015 for reading; ignore it
while [[ ! "$t" || "$t" -lt 0 ]]; do
# getting temp can take a couple of seconds
t=$(<"${devices[d]}/temperature") # get reading
done
p="${devices[d]##*-}" # probe serial number
# reading is in millidegrees
t=$(bc <<<"scale=3; $t/1000")
temp+=("P-$p ${t}") # now degrees
done
printf '%(%Y-%m-%d %H:%M:%S)T ' # date and time
printf '%s %1.3f ' ${temp[@]} # probe data
printf '\n' # newline
sleep 10
done

I have it running!!!!!!!!!!
My question is::::
how does it work, config file, cron job ..
I haven't found HOW it work.

HOW what works?

I run the above as a background job, output recorded in a data file for
further processing by gnuplot.


--
Chris Elvidge
England

--- SoupGate-Win32 v1.05
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zeneca <pasIci@ailleur.fr> wrote:

I have it running, but I wonder if there is somewhere a config file, a
cron ..
How does it run

Well, how did you install it? There is no driver or service or daemon, it's just a gpio read-out (according to a certain protocol, that's what the
Python library is for). If by running you mean it's logging the temperature somewhere, then you probably installed a Python program that now runs in
the background. It might be started from /etc/rc.local or it might be
installed as a service. We don't know. So how did you get it running?

See https://bigl.es/ds18b20-temperature-sensor-with-python-raspberry-pi/ or https://learn.adafruit.com/adafruits-raspberry-pi-lesson-11-ds18b20-temperature-sensing/overview

--- SoupGate-Win32 v1.05
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On 11/04/2022 11:22, zeneca wrote:

Le 11/04/22 à 10:31, zeneca a écrit :

Le 10/04/22 à 15:43, Chris Elvidge a écrit :

On 10/04/2022 11:30, Andy Burns wrote:

zeneca wrote:

I have it running, but I wonder if there is somewhere a config
file, a cron ..
How does it run

You have to have something that will scan your 1-wire bus, detect
and read your temperatue sensor(s) ... no doubt something already
exists that can run on a Pi

Try this:

#!/bin/bash

# get a list (array) of all devices
shopt -s nullglob
devices=(/sys/bus/w1/devices/w1_bus_master1/28*)
[ ${#devices[@]} -eq 0 ] && {
printf 'No device files found. Investigate.'
exit 1
}
shopt -u nullglob
printf '%s\n' "${devices[@]}"

while true; do # repeat forever
unset temp # new array
for d in ${!devices[@]}; do # for each device
unset t # new temperature value
# at odd times we get -015 for reading; ignore it
while [[ ! "$t" || "$t" -lt 0 ]]; do
# getting temp can take a couple of seconds
t=$(<"${devices[d]}/temperature") # get reading
done
p="${devices[d]##*-}" # probe serial number
# reading is in millidegrees
t=$(bc <<<"scale=3; $t/1000")
temp+=("P-$p ${t}") # now degrees
done
printf '%(%Y-%m-%d %H:%M:%S)T ' # date and time
printf '%s %1.3f ' ${temp[@]} # probe data
printf '\n' # newline
sleep 10
done

I have it running!!!!!!!!!!
My question is::::
how does it work, config file, cron job ..
I haven't found HOW it work.

It run every 5 minutes, how to modify this, it run from a gpio.?? how to change this?? how to change the precision ?? ....

What runs every five minutes? And where did you get it from?
Look at your cron file (crontab -e) for the 5 minute interval time.

Your probe connects to a gpio pin (default 4 as I remember)
You change the default pin in /boot/config.txt on the dtoverlay=w1-gpio
line. Look it up.

Probe data is in millidegrees - you can't change that.


--
Chris Elvidge
England

--- SoupGate-Win32 v1.05
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Le 11/04/22 à 10:31, zeneca a écrit :

Le 10/04/22 à 15:43, Chris Elvidge a écrit :

On 10/04/2022 11:30, Andy Burns wrote:

zeneca wrote:

I have it running, but I wonder if there is somewhere a config file,
a cron ..
How does it run

You have to have something that will scan your 1-wire bus, detect and
read your temperatue sensor(s) ... no doubt something already exists
that can run on a Pi

Try this:

#!/bin/bash

# get a list (array) of all devices
shopt -s nullglob
devices=(/sys/bus/w1/devices/w1_bus_master1/28*)
[ ${#devices[@]} -eq 0 ] && {
     printf 'No device files found. Investigate.'
     exit 1
}
shopt -u nullglob
printf '%s\n' "${devices[@]}"

while true; do  # repeat forever
     unset temp      # new array
     for d in ${!devices[@]}; do     # for each device
         unset t # new temperature value
         # at odd times we get -015 for reading; ignore it
         while [[ ! "$t" || "$t" -lt 0 ]]; do
             # getting temp can take a couple of seconds
             t=$(<"${devices[d]}/temperature") # get reading
         done
         p="${devices[d]##*-}"  # probe serial number
         # reading is in millidegrees
         t=$(bc <<<"scale=3; $t/1000")
         temp+=("P-$p ${t}") # now degrees
     done
     printf '%(%Y-%m-%d %H:%M:%S)T ' # date and time
     printf '%s %1.3f ' ${temp[@]}   # probe data
     printf '\n'                     # newline
     sleep 10
done

I have it running!!!!!!!!!!
My question is::::
 how does it work, config file, cron job ..
I haven't found HOW it work.

It run every 5 minutes, how to modify this, it run from a gpio.?? how to
change this?? how to change the precision ?? ....

--- SoupGate-Win32 v1.05
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On Mon, 11 Apr 2022 10:08:54 +0100, Chris Elvidge wrote:

HOW what works?

I run the above as a background job, output recorded in a data file for further processing by gnuplot.

Look it up! Get used to using the command line because using it is often
faster than messing about with a web browser.

'man' tells you about programs and functions, e.g. 'man sleep' run from
the command line tells you about the 'sleep' command

Don't know the name of the command you want? Use 'apropos' command:
'apropos delay' tells you about things that cause delays, including
'sleep'.

Despite the title, consider about buying a copy of 'Linux for Dummies'.
The '...for dummies' books are quite well regarded and less technical that O'Reilly books, which are really for sysadmins and developers.

Also, you should learn how to ask technical questions. Just saying 'Wah!
it doesn't work' is a good way to be ignored. Your post should say:

- what you're trying to do and why

- what you tried

- what happened when you tried it.
Include the command you ran and the 'whole' response to that command
by copying and pasting text from the screen. ALWAYS show what you see
on screen and NEVER paraphrase it.

- what you expected to happen.

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Le 11/04/22 à 13:18, Chris Elvidge a écrit :

On 11/04/2022 11:22, zeneca wrote:

Le 11/04/22 à 10:31, zeneca a écrit :

Le 10/04/22 à 15:43, Chris Elvidge a écrit :

On 10/04/2022 11:30, Andy Burns wrote:

zeneca wrote:

I have it running, but I wonder if there is somewhere a config
file, a cron ..
How does it run

You have to have something that will scan your 1-wire bus, detect
and read your temperatue sensor(s) ... no doubt something already
exists that can run on a Pi

Try this:

#!/bin/bash

# get a list (array) of all devices
shopt -s nullglob
devices=(/sys/bus/w1/devices/w1_bus_master1/28*)
[ ${#devices[@]} -eq 0 ] && {
     printf 'No device files found. Investigate.'
     exit 1
}
shopt -u nullglob
printf '%s\n' "${devices[@]}"

while true; do  # repeat forever
     unset temp      # new array
     for d in ${!devices[@]}; do     # for each device
         unset t # new temperature value
         # at odd times we get -015 for reading; ignore it
         while [[ ! "$t" || "$t" -lt 0 ]]; do
             # getting temp can take a couple of seconds
             t=$(<"${devices[d]}/temperature") # get reading >>>>          done
         p="${devices[d]##*-}"  # probe serial number
         # reading is in millidegrees
         t=$(bc <<<"scale=3; $t/1000")
         temp+=("P-$p ${t}") # now degrees
     done
     printf '%(%Y-%m-%d %H:%M:%S)T ' # date and time
     printf '%s %1.3f ' ${temp[@]}   # probe data
     printf '\n'                     # newline >>>>      sleep 10
done

I have it running!!!!!!!!!!
My question is::::
  how does it work, config file, cron job ..
I haven't found HOW it work.

It run every 5 minutes, how to modify this, it run from a gpio.?? how
to change this?? how to change the precision ?? ....

What runs every five minutes? And where did you get it from?
Look at your cron file (crontab -e) for the 5 minute interval time.

No entry found in all cron I found (etc/cron.d ....)
every 5 minutes a read data from the ds18.. is iniiatted and data stored
in /sys/bus/w1/devices/w1_bus_master1/28-0000034decc3/w1_slave where I
can read temperature from.
My appli display temperature on a web page, store it in a rrdtools
database, display graphics
And temperature is alos displayed on a NOKIA-5110 display (writen in C)

Your probe connects to a gpio pin (default 4 as I remember)
You change the default pin in /boot/config.txt on the dtoverlay=w1-gpio
line. Look it up.

Doesn't give idea where to changes w1-gpio??

Probe data is in millidegrees - you can't change that.

Many thanks for you answer


--- SoupGate-Win32 v1.05
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On 10/04/2022 11:30, Andy Burns wrote:

zeneca wrote:

I have it running, but I wonder if there is somewhere a config file, a
cron ..
How does it run

You have to have something that will scan your 1-wire bus, detect and
read your temperatue sensor(s) ... no doubt something already exists
that can run on a Pi

The python w1thermsensor module is useful, it also includes a command
line program to scan for all ds18b20 devices.

---druck

--- SoupGate-Win32 v1.05
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On 11/04/2022 13:25, druck wrote:

On 10/04/2022 11:30, Andy Burns wrote:

zeneca wrote:

I have it running, but I wonder if there is somewhere a config file,
a cron ..
How does it run

You have to have something that will scan your 1-wire bus, detect and
read your temperatue sensor(s) ... no doubt something already exists
that can run on a Pi

The python w1thermsensor module is useful, it also includes a command
line program to scan for all ds18b20 devices.

---druck

You don't need python. Just list:
/sys/bus/w1/devices/w1_bus_master1/28-*

Current temperature (millidegrees) is in /sys/bus/w1/devices/w1_bus_master1/28-[serialnum]/temperature


--
Chris Elvidge
England

--- SoupGate-Win32 v1.05
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On 11/04/2022 13:28, zeneca wrote:

No entry found in all cron I found (etc/cron.d ....)
every 5 minutes a read data from the ds18.. is iniiatted and data stored
in /sys/bus/w1/devices/w1_bus_master1/28-0000034decc3/w1_slave where I
can read temperature from.
My appli display temperature on a web page, store it in a rrdtools
database, display graphics
And temperature is alos displayed on a NOKIA-5110 display (writen in C)

Did you look in your own crontab?

/sys/bus/w1/devices/w1_bus_master1/28-0000034decc3/w1_slave and /sys/bus/w1/devices/w1_bus_master1/28-0000034decc3/temperature are
updated constantly. There is one directory (28-nnnnnnnnnnnn) for each probe.

What you mean is every five minutes w1_slave is read. You could also
read temperature directly from the file 'temperature'.

In your (undoubtedly python) program, is there a line such as
time.sleep(600)? That's the delay between readings.


--
Chris Elvidge
England

--- SoupGate-Win32 v1.05
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On 11/04/2022 13:18, Martin Gregorie wrote:

On Mon, 11 Apr 2022 10:08:54 +0100, Chris Elvidge wrote:

HOW what works?

I run the above as a background job, output recorded in a data file for
further processing by gnuplot.

Look it up! Get used to using the command line because using it is often faster than messing about with a web browser.

/ deleted /

Include the command you ran and the 'whole' response to that command
by copying and pasting text from the screen. ALWAYS show what you see
on screen and NEVER paraphrase it.

- what you expected to happen.

I think you replied to the wrong poster.


--
Chris Elvidge
England

--- SoupGate-Win32 v1.05
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On 11/04/2022 13:38, Chris Elvidge wrote:

On 11/04/2022 13:25, druck wrote:

On 10/04/2022 11:30, Andy Burns wrote:

zeneca wrote:

The python w1thermsensor module is useful, it also includes a command
line program to scan for all ds18b20 devices.

---druck

You don't need python. Just list:
/sys/bus/w1/devices/w1_bus_master1/28-*

Current temperature (millidegrees) is in /sys/bus/w1/devices/w1_bus_master1/28-[serialnum]/temperature

No you don't _need_ python, but it saves faffing about extracting the
CRC check (failures are common with long leads) and reformatting to
degrees. If you are going to stick the value in database, this can be
done in a couple of lines of python with the sqlite module.

---druck

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On Mon, 11 Apr 2022 13:51:11 +0100, Chris Elvidge wrote:

On 11/04/2022 13:18, Martin Gregorie wrote:

On Mon, 11 Apr 2022 10:08:54 +0100, Chris Elvidge wrote:

HOW what works?

I run the above as a background job, output recorded in a data file
for further processing by gnuplot.

Look it up! Get used to using the command line because using it is
often faster than messing about with a web browser.

/ deleted /

Include the command you ran and the 'whole' response to that command
by copying and pasting text from the screen. ALWAYS show what you
see on screen and NEVER paraphrase it.

- what you expected to happen.

I think you replied to the wrong poster.

Indeed. Apologies.

--- SoupGate-Win32 v1.05
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In article <t312ri$sd$1@dont-email.me>, chris@mshome.net says...

Probe data is in millidegrees - you can't change that.

The resolution is actually 1/16 degree, but reported to 3 decimal
places.

I think there is a similar higher resolution device (GX20MH01?), but I
haven't tried it.

--
John

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zeneca <pasIci@ailleur.fr> wrote:

Le 11/04/22 à 10:31, zeneca a écrit :

I have it running!!!!!!!!!!
My question is::::
 how does it work, config file, cron job ..
I haven't found HOW it work.

It run every 5 minutes, how to modify this, it run from a gpio.?? how to change this?? how to change the precision ?? ....

You might find this useful:

http://www.catb.org/esr/faqs/smart-questions.html

--
_/_
/ v \ Scott Alfter (remove the obvious to send mail)
(IIGS( https://alfter.us/ Top-posting!
\_^_/ >What's the most annoying thing on Usenet?

--- SoupGate-Win32 v1.05
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Andy Burns <usenet@andyburns.uk> wrote:

zeneca wrote:

I have it running, but I wonder if there is somewhere a config file, a cron ..
How does it run

You have to have something that will scan your 1-wire bus, detect and read your
temperatue sensor(s) ... no doubt something already exists that can run on a Pi

https://gitlab.com/salfter/pifridge

This is some Python code that uses the kernel-space 1-Wire support to read a temperature sensor and control an addressable switch in response. 1-Wire devices connected to an appropriate interface are enumerated when the kernel boots and show up under /sys/bus/w1/devices.

(Also related to this project: https://gitlab.com/salfter/rpi_i2c_1w, which brings 1-Wire, I2C, and power out to an RJ-45 connector. IIRC, it also adds
an RTC.)

--
_/_
/ v \ Scott Alfter (remove the obvious to send mail)
(IIGS( https://alfter.us/ Top-posting!
\_^_/ >What's the most annoying thing on Usenet?

--- SoupGate-Win32 v1.05
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