After another night of Temp/humidity not reporting, I completely disassembled the ISS and looked it over. I did not see anything that looked wrong, but I cleaned it up. I didn't see anything with the temp/humidity sensor obvious, but I also cleaned the cover and filter screen.
While I was at it, I lubricated the anemometer and wind vane. The wind vain was definitely not turning easily. The anemometer wasn't bad. Though it certainly seemed like under 5 mph it was not spinning the last couple of years.
Since the rain gauge and wind speed/direction seem to be working, things are pointing to the temp/humidity sensor. It is as if it works, but when the voltage drops below some level where it should work, it doesn't work.
I am still struggling with whether to spend $60 on a new sensor. I would if I knew the station would work for several more years, but the anemometer is marginal, and the solar cell / ISS cover looks like it has been out in the weather for 15 years.
The Ambient WS-2902 I have been looking at requires some magic to work with Weewx. Not sure I want to attempt a major new project.
As much as prices for the Davis weather stations has increased the last 15 years, and the trouble I have had with my Vantage Pro 2, buying a Vantage Vue ISS would be plug and play with my current setup.
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