DS18B20 (1-Wire) Support, why is it so problematic?

Banana Pi SBCs design
1

I’m trying to help people use my Pi Hat with RPi clones and everything works, except for the DS18B20 temperature sensors. Using current versions of Armbian on both a Banana Pi M2 Zero and a Banana Pi M4 Berry, but no devices show up in /sys/bus/w1/devices.

/etc/modules contains:

w1-gpio
w1-therm

/boot/armbianEnv.txt contains:

overlays=w1-gpio
param_w1_pin=PA6
param_w1_pin_int_pullup=1

NOTE: PA6 is used so that it matches up with the default 1-Wire pin used on an RPi. These hats are already built, I can’t change this to a different pin.