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I can't make visible ds18b20 :/

w1-gpio
w1-therm

Are running and in /etc/modules

Have added to config 

dtoverlay=w1-gpio,gpiopin=4

I've got some data like 

00-580000000000  00-980000000000  00-d80000000000

(00-xx and zeros) xx are changing and number of them changes too. I got resistor 4k7 Ohm like here

ds18b20
(source: reuk.co.uk)

Except for using 5V

I have checked wires and they are fine, i got 5V and GND on board, no idea how to check data but cable itself is fine. I got rpi 2 and connecting to GPIO4 (pin7) Any ideas?

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  • 3
    I'm no electrician but it seems to me using 5V as a pull-up on a 3.3V GPIO is a very bad idea.
    – goldilocks ♦
    Commented Aug 5, 2015 at 18:06
  • 1
    @goldilocks In this case the 4k7 resistor has probably limited the damage but it is a much better idea to power the DS18B20 from a 3V3 pin.
    – joan
    Commented Aug 5, 2015 at 18:51

1 Answer 1

Reset to default
1

If you are using device tree (as you appear to be doing from the /boot/config.txt entry) the w1-gpio and w1-therm entries are not needed in /etc/modules.

Remove w1-therm and w1-gpio from /etc/modules and reboot.

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