/sys/devices/w1_bus_master1/30-000010415807 # od w1_slave
0000000  163403 177777 177777 036377 177477 177777 060151 170377
0000020  010711 177777 177777 177777 100040 177777 177777 177777
0000040  140004 006423 002403 076722 017362 015440 163032 134706
0000060  021407 000207 123123 031637 103477 010000 006012 000014
0000100  177777 177777 177777 177777 177777 177777 177777 177777
*
0000200
/sys/devices/w1_bus_master1/30-000010415807 # cd -
/usr/bin
/usr/bin # ln -s ../../bin/busybox hexdump
/usr/bin # cd -
/sys/bus/w1/devices/30-000010415807
/sys/devices/w1_bus_master1/30-000010415807 # hexdump w1_slave
0000000 ffff ffff ffff ffff ffff ffff ffff ffff
*
0000080

New paste:
od -x w1_slave
0000000     ffff    ffff    ffff    ffff    ffff    ffff    ffff    ffff
*
0000200

This one looks better:
0000000  005012 005012 005012 067412 020144 074055 027440 074563
0000020  027563 072542 027563 030567 031457 004460 073457 057461