Raspberry PI 2 Model B Not Detecting ds18b20 Sensor (Tested with Multiple Sensors)

Question

I just wanted to ask some advices. I have tried everything I could find, including :

I just cannot seem to get these sensors to pic up at all

I have rechecked my wiring and all seems Fine. was following this (Guide)

I tried testing GPIO4 with an LED and Python.. but I cannot seem to get it to switch state to .HIGH (Possibly Faulty GPIO pin?)/(Locked by Kernel?)

Any Assistance would be appreciated.

Images of Connections

Bread board layout

Different Angle on breadboard

Could you post a photo of your set-up and could you detail the connections you have made between the Pi and the sensor(s). — joan, Apr 28, 2015 at 15:24
Image of Breadboard Connections link<br> Image of GPIO pins link Image of Breadboard from the back Link — Dean Retic Esterhuizen, Apr 28, 2015 at 16:02
Could you edit your post and add those photos? It's more useful for subsequent readers. Also could you describe the connections you have made? It is easier to check a written description against the photos. — joan, Apr 28, 2015 at 16:09
As far as I can tell from the photos the connections look okay. One end of the resistor is connected to 3V3. Is the other connected to the data output pin? — joan, Apr 28, 2015 at 16:49

Ghanima · Accepted Answer · 2015-05-03 14:58:00Z

1

This happened to me today, after few hours I found the answer. :)

Add this line to /boot/config.txt:

device_tree=

Then restart the Pi. Hope this will fix for you too.

Ghanima♦

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answered May 2, 2015 at 22:29

makaveli

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