I’ve been running my outdoor Arduino project for a few weeks, and I am seeing condensation on the inside of the box. I am using the following NEMA rated polycase which is supposed to be weatherproof. I also coat the microcontroller with Corrosion X; however, I do not coat the outside of the enclosure with it.
I do have a PG Cable Gland running wires from the outside of the box into the enclosure; however, I don’t think I see condensation building up around that. The condensation is building up on the inside of the plastic cover, but not on the microcontroller (not from what I can tell).
The condensation does seem to build up after a good rain or sprinklers go off. How can I prevent the condensation? Am I doing something wrong?