Thanks for the link! This will be my first attempt at weatherproofing an MCU (and my first board all together). My questions are:
1) Do you use any coating (nail polish, etc.) on your Moteino? Or is the Corrosion X the same thing?
I've used spar varnish and a variety of other sealants to keep water out, but have never found anything as completely effective as Corrosion X. It was highlighted in a link somewhere in this forum and I can attest, water does not go through anything coated with this messy stuff! I just spray a small puddle into the corner of an enclosure and use a cheap brush to 'paint' the circuit board, battery terminals, and connectors of everything inside the enclosure before sealing it. This stuff gives off an odor that effectively fills the void with this moisture barrier. I've never seen anything like it. It's very messy, but very worthwhile.
2) Have you had any issues leaving the valve completely exposed to the elements?
I no longer do that, mostly because it's ugly. I generally place a valve box over it. This mostly keeps UV from crazing the plastic enclosure, but it also makes the spiders feel cozy inside the box.
3) It looks like you have a wrap around your wires going into the enclosure. Do you mind going into detail on what you're using? I've found some cable glands with a polycase + knockouts, but I can't quite tell what you're using.
On some projects I use direct wire cables with cable glands (PG7 or PG9), but I think what you're seeing are some water proof connectors I got from a Marine supply house. These are very good, with good seal and thick gold plating, IP68 rating, but they are expensive. If you look around for IP68 Panel connectors, you'll find a world of choices.
Tom