DS18B20 not registering

[some_evil]

Hi all,I have a raspberry pi b board connected to my breadboard and I have used the commands :
Sudo modprobe w1-gpio
Sudo modprobe w1-therm

Navigated to the w1/devices directory and used ls to find my connected thermometer, but each and every time I do this there is nothing registered/showing.

I have updated the firmware and tried several different thermometers to no avail.I have run out of things to check, im hoping someone has other suggestions for me.


Thanks for your time.

[rpdom]

The Pi now uses something called "Device Tree" to manage some hardware and drivers.

You need to set an option in /boot/config.txt to enable the 1-wire bus gpio driver.

Add the line

Code: Select all

dtoverlay=w1-gpio

then reboot and your sensor will appear.

[some_evil]

Worked a treat, thanks for your help.

Do you know if each time I restart my Pi wether or not I need to retype out the modprobe commands? Or are they set now?

Thanks

[DougieLawson]

The modprobe stuff isn't needed. The kernel modules will get loaded by the device tree processing during boot.

[some_evil]

perfect, thanks for your help.