root@raspberrypi:~# modprobe w1-gpio
root@raspberrypi:~# ls /sys/bus/w1/devices/w1_bus_master1/
22-0000001d84f2  w1_master_attempts	    w1_master_search
driver		 w1_master_max_slave_count  w1_master_slave_count
power		 w1_master_name		    w1_master_slaves
subsystem	 w1_master_pointer	    w1_master_timeout
uevent		 w1_master_pullup
w1_master_add	 w1_master_remove
root@raspberrypi:~# cat /sys/bus/w1/devices/w1_bus_master1/22-0000001d84f2/w1_slave
9d 01 4b 46 7f ff 03 10 57 : crc=57 YES
9d 01 4b 46 7f ff 03 10 57 t=25812

t=25812 means 25.812°C