Dan,
More sensors. I have two 1-Wire networks outside. One parasitic (Temp-08) and one non parasitic (9097). Multiple parasitic temperature sensors. First one was in the AAG weather station (as documented; gets hot in the sun), under eaves, under my deck, here and there. The 9097 1-wire network has a few outside sensors too but these are all combo sensors either HB or Midon. Two years ago I did purchase a Pagoda that I installed on the roof next to the weather station with a combo Light, Temp and Humidity sensor. The temperature readings are better in the pagoda than the AAG device. The only problem with the pagoda is that the plastic bracket is cracked and the combo sensor only provides temperature (humidity and light doesn't work anymore). Aside from the 1-Wire sensors I have an HAI outside temperature/humidity sensor under the eave on the deck. I also keep a little notebook with the 1-Wire MAC addresses of the 1-Wire devices, type of device and physical placement of the device. I would lose track of the devices if I didn't have my little notebook. I also keep a live text file on the desktop of the HS server with the devices grouped to the separate Temp-0X or 9097 live views (with dates). Relating to any sort of lightning issues; this is the first time I've seen this and lucky that it didn't damage the sensor or the 9097's/Temp-0X devices; just the ports on the Digi boxes.
Recently I have started to utilize rounding formula's to create new variable values with the MCSTemperature application. Theoretically you probably could take four outdoor sensors; average their value and create a 5th temperature reading variable. I do have all of the 1-wire sensors and HAI Temp/humidity sensors recording data in the MCSTemperature DB.
I do graph outdoor temperature in sun and out of direct sunlight sensors and do note a difference.
Initially started with a "star" 1-wire topology and in the last 8 years its become a hybrid star and linear topology. I do see some reflections and also have installed some resistors at the punch panel where all of the wires go to. I don't really notice them too much because you never really see the traffic on the 1-wire network using MCSTemperature. I can though for diagnostics look at the communications on either the Temp-08, Temp-05 or 9097 1-wire network using the MCSTemperature/1-WireXAP/Temp0X-XAP applications. I can also connect a Temp-08 and a 9097 device to one instance of the MCSTemperature program. Today I have two 9097 serial devices talking simultaneously to one 1-WireXAP MCS application. It works fine; depending on the polling it alternates readings between the two devices. (note each of the 9097's have multiple one wire devices on them).
I am curious if the temperature of the tire affects the temperature reading on the sensor? (from the Sun or just the tire rolling).
For inside of the house I ran separate Cat5e cable for each of the sensors. You really don't have to do that if you use the recommended 1-wire linear topology. Same with the outside wired sensors. I don't utilize any wireless sensors. Many many years ago I got tired of changing the batteries for the wireless sensors and keeping track of the batteries. That and I had the opportunity to wire and did so. IE: my mailbox have 3 cat5e cables going to it and I use them today. Most of the cabling was done one at a time after initial implementation. So it could be like a 1-2-3 hours to install one cable running from the basement patch panel wall, through the first floor, second floor, into the attic then dropping the wire into one of the bedrooms. I use a lot of those plastic PVC pipe holders as wiring hangers (multiples spaced as close as 1-2 feet apart).
