rama3 wrote:Have you commented the PU22_MODE define?

Yes. I've tried two different NANOs. No clue what the issue is.

Great work rama. Glad I stumbled across this being that assembler has been down for some time. Would you happen to have a diagram for PU18?

Here's one for PU-18. Vcc and Gnd are suggestions. You can use anything, as long as it's 3.5V and a good ground connection.
snip

Okay so I've tested the 3 ...

Great work rama. Glad I stumbled across this being that assembler has been down for some time. Would you happen to have a diagram for PU18?