Does anyone know how to setup and configure it?

• opkg list | grep 1-wire

You will see quite a few available packages for 1-wire access including some for temperature sensors.
Additionally it would appear that there are several packages relating to using 1-wire with the OWFS file system - see http://owfs.org/ and http://sourceforge.net/projects/owfs/ for information on OWFS

Some of this may be helpful to you

Shoud I expect this packages in the default firmware? Or can I add some missing packages via opkg install <package>

What would be the correct package names? And which GPIO pin would be the data wire?

I would rather like to stick with the original distro. But a dependency issue keeps me from installing the required package kmod-w1-gpio-custom

opkg -A depends kmod-w1-gpio-custom

kmod-w1-gpio-custom depends on:
kernel (= 3.18.20-1-7bed08fa9c06eb8089e82c200340ec66)
kmod-w1
kmod-w1-master-gpio

But checking the kernel

opkg info kernel

• Package: kernel
• Version: 3.18.23-1-65008811ac4622ed020e0bf6384ece5a

tells that the package requires an older kernel or the package dependencies need to be adjusted. Does anyone know how to get the package kmod-w1-gpio-custom installed?

EDIT: yikes, the openwrt build is having some issues. I'll try to resolve it tonight but it might have to wait until tmrw.

Run oupgrade -l -f to pickup b269, it includes the following kernel modules:

• kmod-w1
• kmod-w1-gpio-custom
• kmod-w1-master-gpio

Let us know how it goes!

I have a Gikfun DS18B20 sensor similar to the above (http://www.amazon.ca/gp/product/B012C597T0) -- I wired it like so: http://monosnap.com/image/HSxZm5p6mUS8iF5uvhtqgJxtScR7te

From what I can tell I have the latest firmwire cited above:

Firmware 0.0.6 (b270)
Latest Firmware 0.0.6 (b266)

My understanding is I need to figure out how to compile this: https://github.com/milesburton/Arduino-Temperature-Control-Library

Any tips to get this compiled and get a reading? Or is there anyway to use the fast-gpio tool from onion?

Also, tried reading with fast-gpio but I'm just getting a reading on 0 - should I expect a reading from this?

@Nathan-Bertram : You need the kmod-w1-gpio-custom to tell the 1-Wire interface to which GPIO pin you connect your data wire. Thats done by creating a file at

• /etc/modules.d/55-w1-gpio-custom

containing only one line:

  w1-gpio-custom bus0=0,19,0

where 19 is GPIO pin (replace that number by the pin your sensor is connect to)

 cat /sys/devices/w1_bus_master1/28-01234567890a/w1_slave

where 28-01234567890a is the sensor id. This file only exists if all modules loaded correctly and an device is connected.

root@Omega-088F:/sys/devices/w1_bus_master1# cat /etc/modules.d/55-w1-gpio-custom
w1-gpio-custom bus0=0,0,0

root@Omega-088F:/sys/devices/w1_bus_master1# ls -la /sys/devices/w1_bus_master1
drwxr-xr-x    4 root     root             0 Jan 27 03:47 .
drwxr-xr-x    6 root     root             0 Jan  1  1970 ..
drwxr-xr-x    2 root     root             0 Jan 27 04:03 00-280000000000
drwxr-xr-x    2 root     root             0 Jan 27 04:03 00-c80000000000
lrwxrwxrwx    1 root     root             0 Jan 27 03:47 driver -> ../../bus/w1/drivers/w1_master_driver
lrwxrwxrwx    1 root     root             0 Jan 27 03:47 subsystem -> ../../bus/w1
-rw-r--r--    1 root     root          4096 Jan 27 03:47 uevent
-rw-rw-r--    1 root     root          4096 Jan 27 03:47 w1_master_add
-r--r--r--    1 root     root          4096 Jan 27 03:47 w1_master_attempts
-rw-rw-r--    1 root     root          4096 Jan 27 03:47 w1_master_max_slave_count
-r--r--r--    1 root     root          4096 Jan 27 03:47 w1_master_name
-r--r--r--    1 root     root          4096 Jan 27 03:47 w1_master_pointer
-rw-rw-r--    1 root     root          4096 Jan 27 03:47 w1_master_pullup
-rw-rw-r--    1 root     root          4096 Jan 27 03:47 w1_master_remove
-rw-rw-r--    1 root     root          4096 Jan 27 03:47 w1_master_search
-r--r--r--    1 root     root          4096 Jan 27 03:47 w1_master_slave_count
-r--r--r--    1 root     root          4096 Jan 27 03:47 w1_master_slaves
-r--r--r--    1 root     root          4096 Jan 27 03:47 w1_master_timeout

Or you can make a push request to the wiki repo directly: https://github.com/OnionIoT/wiki

https://github.com/OnionIoT/wiki

Hello,
Is there a way how to check this ? I mean using a temperature sensor.
I've been reading this post, and none of the folders / file exists on my Onion.
Just updated to the latest version.
Thanks,
Miguel

root@Omega-276D:/etc/modules.d# ls gpio

30-gpio-button-hotplug 58-i2c-gpio-custom spi-gpio
30-gpio-irq 59-i2c-gpio w1-master-gpio
50-ledtrig-gpio 60-leds-gpio

Which one should I use ?
Thanks,
Miguel

What @Omega303 mentioned above is you do following steps to get the 1 wire running:

1. Upgrade your firmwire to the latest (via the gui under settings is easiest)

touch /etc/modules.d/55-w1-gpio-custom
vi /etc/modules.d/55-w1-gpio-custom

Then add this one line (replace 19 with the pin # you want to use):
w1-gpio-custom bus0=0,19,0

1. Restart your onion. Then you should see contents in /sys/devices/w1_bus_master1/* now ... if your device is plugged in then there should be a file reading /sys/devices/w1_bus_master1/28-DEVICEID/w1_slave (28-DEVICEID where * is the id of your device)

I'm currently not getting a read from #3 - so that's where I'm stumped (any advice with the comments above?) but at least I know w1 is running.

I have listed in a previous post all modules I have with gpio.

Any suggestions ?
Thx,