I'm going to toss a zigbee temp/humidity sensor in the attic for triggering my attic fan. Except, I hate going up there. The insulation is blown fiberglass and it's about 2 feet deep.
My thought is, I'll 3d print a round flange that I can put a 1.5" PVC tube on, and then use a hole saw in the ceiling of a closet and push a couple of feet of pipe up into attic and glue the flange to the ceiling to keep it from falling out. Then, I'll put the sensor on the end of a yard stick or a smaller PVC pipe, push it up the hole, and then have a cap that keeps it from falling down.
Then, when a battery needs replacement, I don't have to go swimming through insulation.
I hard-wired all sensors that are in hard to access locations. I bought a bunch of 3V DC adaptors and soldered the contacts to the +ve and -ve terminals. Not just the ones in the attic, but also leak sensors behind places like the fridge and washing machine.
I do have one outlet in the attic that I added a couple of years ago. That's not a bad idea. Ultimately, I need to monitor the air temp only for summer, but I need to monitor the sheathing temp in the winter to prevent ice dams.
Today, I do this with an arduino node and two temp sensors that report back to Vera.
