Default w1 pin is PA20 which is not exposed on NanoPi NEO. You could choose physical pin 12 on the 24 pin header (compare with FA wiki), then use bin2fex and fex2bin to change logical pin 20 to 6 for 1-Wire and disable PA06 as GPIO (by deleting this line).
Currently our fex files for NanoPi NEO, M1 and Air need some adjustments but at least I won't touch this until we got NanoPi Air into our hands and until PWM and Audio issues are fully understood and resolved (since there seem to be some conflicts here and there)
