Talk:Sensors: DS18B20
Start with this short description of the commands: https://pinout.xyz/pinout/1_wire#
For the Hive Interface Board 0.3 in the file /boot/config.txt you will need:
dtoverlay=w1-gpio,gpiopin=17 This starts a 1-wire bus on the specified pin (17). Then the rest of the command should work.
If not, then need to turn on the pull up for GPIO 17.