Hello,
recently I bought a 1Wire Pi Plus. I intend to use the board with Raspian Buster. I tried to test the board in combination with a RaspberryPi 4, as this fails, with a 3B+. I2C installation seems to work on booth Pis, device is detected 0x18. I intend to use the Kernel Modules. With the 1-wire interface enabeled - /boot/config.txt -dtoverlay=w1-gpio, I find a w1 directory in "/sys/bus" with faulty files. When I comment out - #dtoverlay=w1-gpio - and insert instead - dtoverlay=ds2482 - I do not find a w1 folder in "/sys/bus". This is also true when adding w1-therm to config.txt. Installation of OWFS failed, some errors during installation. I'm reluctant to use OWFS at all, as I do not know, whether the package works under Python 3, I use only, and as there are many issues reported. Tutorial are old, outdated probably. What's to do, to get a running system?
Regards
hwissing
using 1-w Linux Kernel Modules
3076 Views - Created 17/02/2020
17/02/2020
Posted by:
hwissing
18/02/2020
Posted by:
andrew
Location:
United Kingdom
Hello hwissing
The ds2482 overlay does not appear to work on Raspbian Buster so you will have to enable the kernel module manually. The following steps should work.
Edit /etc/modules
Add the following to the end of the file:
Save the file and then edit /etc/rc.local
Add the following after the comments but before the exit 0 line:
Save the file and reboot.
Your 1-wire devices should now be available in /sys/bus/w1/devices
Make sure you remove dtoverlay=ds2482 and dtoverlay=w1-gpio from /boot/config.txt otherwise it may not work correctly. I tried the steps above with a Raspberry Pi 4 and a clean install of the latest Raspbian Linux and the two devices on my 1 Wire Pi Plus appear in the devices folder.
The ds2482 overlay does not appear to work on Raspbian Buster so you will have to enable the kernel module manually. The following steps should work.
Edit /etc/modules
sudo nano /etc/modulesAdd the following to the end of the file:
ds2482Save the file and then edit /etc/rc.local
sudo nano /etc/rc.localAdd the following after the comments but before the exit 0 line:
echo ds2482 0x18 > /sys/bus/i2c/devices/i2c-1/new_deviceSave the file and reboot.
Your 1-wire devices should now be available in /sys/bus/w1/devices
Make sure you remove dtoverlay=ds2482 and dtoverlay=w1-gpio from /boot/config.txt otherwise it may not work correctly. I tried the steps above with a Raspberry Pi 4 and a clean install of the latest Raspbian Linux and the two devices on my 1 Wire Pi Plus appear in the devices folder.
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