Come on, you know I have something to say. Maybe tip me off next time my head is buried and I haven't seen your post...
If in range use the newer L-REPPRO in a small plastic weatherproof enclosure. If too far away you need to wire by MUX to regular Aux. repeater or consider 2nd main repeater over Ethernet.
Does anyone use RR2 repeaters outside in any capacity, and if so, how do you do it?
I have sold them before for this, but haven't heard of any issues. Modules say "Operate between 32 °F to 131 °F (0 °C to 55 °C)." Dimmer does say the same temp, but also indoor use only. We use these a lot in weatherproof covers w/o problem but if you have extreme temperatures proceed w/ caution.
Does anyone use any outdoor RR2 switching modules outside in climates where there are very cold and hot conditions, and if so, how do you place them?
Does anyone have indoor RR2 modules that use low voltage runs as a relay non-RR2 120V outdoor switches, and if so which ones and how?
I would do this using a VCRX, 4 outputs to use, can run any sort of relay likely 24vac are most common.
Does anyone use RR2 keypads outdoors in similar conditions (even in a box) and if so, how do you do it?
Same, try to maintain plastic weatherproof boxes/covers to preserve as much range as possible. .
Does anyone use Picos outdoors in a box, and if so, how have they fared?
Same as above, could potentially mount in weatherproof cover only seal w/ silicone or preferred caulking. There is a company out there that weatherproof electronics. Some one in this thread brought them to my attention privately, but I think they basically coat the electronics with something to weatherproof them.
Is anyone controlling any pool equipment through RR2, and how have you found it?
Yes, I have a pentair variable-speed w/interface module. I control it, my heater (on/off), air/bubbles, and valves. I have a Pool with a spa that spills over into it. The only thing I want to add is to control the heat, but I'm still working on that.
Has anyone integrated pool temperature and RR2?
Not yet, but on my chopping block. Thinking of using wired temp sensor to one of their thermostats and treat it like any other heater.
I also used generic import RGB pool light. They switch between color & mode by turning them on/off. This is sort of a pain, but I had RF one's and the range was and issue. So sync'ing both lights never quite worked right. I would rather have a typical RGB controller over 4wire back to a power supply. But as it is now, I just turn on and off with a PICO to get the color/mode I like and the lights were not $400 each.
If you are building a control panel for colder temperatures, they do make panel heaters to keep your equipment in operating temperature.