I'm having an issue with my ds18b20.
Raspberry pi 2 model b v1.1 Raspbian Jessie 4.1.13-v7+
I've added w1-gpio and also w1-therm to /etc/modules as well as dtoverlay=w1-gpio to /boot/config.txt
sudo apt-update and
My sensor is hooked up to pin 1 to power, pin 7 (gpio 4) to data and pin 6 to ground with a 4.7k resistor between pin 1 and pin 7 (gpio 4)
Also have a second ds18b20 that I bought from a local store that is from df robot (with a 4.7k resistor built into the board.), same issue.
When I cd to /sys/bus/w1/devices/ and see what's in there, I only get the master bus 1 and no sensor (either version that I own)
Am I missing something here?
Edit: pictures of the setup