Guillaume Gardet wrote:
Hi,
-----Original Message----- From: Per Jessen <per@jessen.ch> Sent: 24 November 2019 16:07 To: opensuse-arm@opensuse.org Subject: [opensuse-arm] any hints for getting ds1820s to work with my nano pi neo air?
I measure temperature with DS1820 hooked up to microcontrollers (PIC) or via serial interface to regular PCs, now I was hoping to use a nanopi neo air, but I am not getting anywhere.
I have the modules loaded - w1-therm, wire, w1-gpio - but no devices turn up in /sys/bus/w1/devices. I'm connecting the DS1820s to GPIO11 - I guess I need to modify the DTB to make this work?
There are some information about 1-wire here: https://en.opensuse.org/openSUSE:1-wire
Thanks Guillaume, Yes, I've seen that one, but it's very limited :-)
If you want to use 1-wire on a regular gpio, with w1-gpio module, you need to update your device-tree to setup it properly. Then, you can check /sys/bus/w1/devices folder for any devices found on the 1-wire bus.
If you do not update your DTB, w1-gpio will not know which gpio to use.
I picked gpio11 because it happened to be convenient for the wiring, but I don't really care which one I use. What is the easiest way of using 1-wire devices on the nanopi, without having to modify the DTB ? I'm using the Friendlycore DTB, not the one from the openSUSE Jeos image. -- Per Jessen, Zürich (7.1°C) Member, openSUSE Heroes. -- To unsubscribe, e-mail: opensuse-arm+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-arm+owner@opensuse.org