Trouble with 1wire - Raspberry Pi Forums

i having difficulty 1wire driver in raspberian. trying set thermal sensor ds18b20, unable see anything.

when try list devices in fs, see.

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pi@raspberrypi /sys/bus/w1/devices $ ls 00-400000000000  00-800000000000  w1_bus_master1 pi@raspberrypi /sys/bus/w1/devices $ 

00-400000000000 , 00-800000000000 change time time, (always 00-) contents not appear similar expecting:

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pi@raspberrypi /sys/bus/w1/devices $ ls 00-200000000000  w1_bus_master1 pi@raspberrypi /sys/bus/w1/devices $ cd 00-200000000000 pi@raspberrypi /sys/bus/w1/devices/00-200000000000 $ ls driver  id  name  rw  subsystem  uevent pi@raspberrypi /sys/bus/w1/devices/00-200000000000 $ 

seeing in messages related 1 wire driver:

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apr  1 00:02:25 raspberrypi kernel: [    4.112221] w1-gpio onewire@0: gpio pin 4    , external pullup pin -1, parasitic power 0 apr  1 00:02:25 raspberrypi kernel: [    6.083494] w1_master_driver w1_bus_maste    r1: w1_search: max_slave_count 64 reached, continue next search. apr  1 00:03:18 raspberrypi kernel: [   53.479054] w1_master_driver w1_bus_maste    r1: family 0 00.800000000000.8c not registered. apr  1 00:04:18 raspberrypi kernel: [  112.790023] w1_master_driver w1_bus_maste    r1: family 0 00.400000000000.46 not registered. apr  1 00:05:05 raspberrypi kernel: [  160.150673] w1_master_driver w1_bus_maste    r1: family 0 00.c00000000000.ca not registered. apr  1 00:06:16 raspberrypi kernel: [  231.411904] w1_master_driver w1_bus_maste    r1: family 0 00.200000000000.23 not registered. apr  1 00:07:16 raspberrypi kernel: [  290.722895] w1_master_driver w1_bus_maste    r1: family 0 00.a00000000000.af not registered. apr  1 00:07:51 raspberrypi kernel: [  326.136136] w1_master_driver w1_bus_maste    r1: family 0 00.600000000000.65 not registered. apr  1 00:08:28 raspberrypi kernel: [  363.464118] w1_master_driver w1_bus_maste    r1: family 0 00.e00000000000.e9 not registered. 

behavior not change if disconnect gpio.

loading w1-gpio , w1-therm @ boot via /etc/modules

following line in config.txt:

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# enable 1wire dtoverlay=w1-gpio,gpiopin=4 

running 3.18.10:

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pi@raspberrypi / $ uname -a linux raspberrypi 3.18.10-v7+ #774 smp preempt wed mar 25 14:10:30 gmt 2015 armv7l gnu/linux pi@raspberrypi / $ 

suggestions or further troubleshooting welcome.

i forgot mention, pi 2.

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