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I'm new in Raspberry... I have a problem, I'm trying to connect a DS18B20 temperature sensor to a Raspberry but I can't see anything start with 28-... in /sys/bus/w1/devices

I've run

sudo modprobe w1-gpio; sudo modprobe w1-therm

wiring

xterm screenshot

I have this in my /boot/config.txt

__dtoverlay=w1-gpio-pullup,gpiopin=4__

If I run the example from More than 10 DS18S20 I get this:

*** Error Unable to detect Logic level 1. No pull-up ?

Please let me know what I'm doing wrong.

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