w1-wire

[rowlandski]

Hi,

I'm trying to find and load: $ sudo modprobe w1-wire w1-ds2433

There's a w1ds2433, which I'm hoping is the same as I believe modprobe will use "-" or "".

But, I can not find: w1-wire, will w1-gpio do the same? Or do I need to download w1-wire from somewhere?

Any comments or suggestions welcome.

Many thanks.

Regards,

Rowland

[RobListon]

I'm also having this issue when trying it using my RPI. I'm pretty sure it's because I have a RPI v2 and w1-wire needs to be replaced with w1-gpio instead.

[rowlandski]

Yes, I think you're right as I have a RPi ver2 too.

I've just created a script to load w1_gpio and w1_ds2433

I'm now going on to the next part of the read.me.....

[RobListon]

You might want to modify your /etc/modules file to include the w1-gpio and w1-ds2433 to load them automatically.

[rowlandski]

Yes, I will be doing that... thanks.

I'm just trying: "You should now see your eeprom appearing: $ ls -l /sys/bus/w1/devices/w1_bus_master1 23-xxxxxxxxxxxx/ (...)"

But get back, "No such file or directory"... and there is no file!

You got it working?

[RobListon]

Yes, When I run "ls /sys/bus/w1/devices" I see 23-0000014b4065 and w1_bus_master1. running "ls /sys/bus/w1/devices/23-0000014b4065" outputs this: driver eeprom id name power subsystem uevent

[rowlandski]

Are you connected as per the wiring diagram? No changes?

Just load the w1_gpio & w1_ds2433 then "ls /sys/bus/w1/devices"... it then works?

[RobListon]

Yes, I have it wired per the diagram. You may need to edit your /boot/config.txt file as well and then reboot. I added this line: dtoverlay=w1-gpio,gpiopin=4

[bvanheu]

Rob Liston have good point, you might have to specify the gpio poin used! Although I think it doesn't matter if the 1wire is configured by the device tree or probed by the user in the kernel.

Running the following should be enough:

modprobe w1-gpio gpiopin=4

[rowlandski]

Thanks for your help.

I've tried: modprobe w1-gpio gpiopin=4 But I don't get any comms out of pin 4 (I have a scope on it)

As for editing /boot/config.txt and adding "dtoverlay=w1-gpio,gpiopin=4" I don't have a config.txt file (I'm new to RPi's, only had one for a couple of days).

Is it a case of creating one?

Thanks.

[RobListon]

Yes, you can create your own config.txt file. The documentation for it is available here: http://www.raspberrypi.org/documentation/configuration/config-txt.md

[rowlandski]

I've found mine by holding down shift while booting.

I actually followed the instructions a few days ago regarding the config.txt, it seems that the tech note is not 100% correct.

But in any case, i've got the EEPROM's ID but now.

Thanks for your reply.

[rowlandski]

Also FYI:

It's best to use dtoverlay=w1-gpio,gpiopin=4, and place it in the config.txt.

Modules and now been load by dtoverlay in the config.txt file. (they are moving away from using the /modules.. modprobe).

HTH