I noticed that last few day we had rain and nothing registering. Wind direction and strength, temp works but rain is not registering neither on the indoor display or on the app/online. What could be wrong?
Usually in this case the rain collector is either clogged with debris or something inside (like a bug nesting infestation, web, egg sacs, etc) is stopping the buckets from tipping back and forth.
Open the unit and make sure the buckets can tip freely.
Oh, one other thing... if this is a new setup, there is a short stabilzer stick that you must remove before the rain buckets can tip. This stick is purely for holding the buckets in place during shipping and is not needed during normal operation. Usually this stick is held in place with a piece of tape on the outside of the sensor body.
I experienced the same problem at one point and found that ants had made a home around the water buckets. After you clean out the bugs, place a moth ball into an open space inside the sensor. Re-mount the sensor and spray bug spray on the post on which the sensor is located to kill / deter the bugs from climbing back up to the sensor. That should do it!