Bipman

try adding it after Init built-in hardware at beginning.

In my case this line was added in the Micropython code:

Power.setExtOutput(True)

Note: make sure you have set Read mode on the Micropython tab; else blockly changes are not reflected.

Thanks
Felix

I've noticed that the Python code does not change when I add the external port power item in.

The voltage is still 0.5v though on the port. Am I missing something?

Bipman

most likely external power is not turned on.

Try Set external port power to output mode. You'll find that block under System - Power.

Thanks
Felix