How the Hydreon works with the CloudWatcher

CloudWatcher with anemometer and Hydreon rain sensor setup

The Hydreon works by opening or closing a contact when it detects rain, and it’s been adapted to work with the CloudWatcher, who expects a variable reading depending on the amount of rain.

A special cable has been devised, that will result in two different readings (from the CloudWatcher point of view), for dry and rain; depending on the specific cable, mainly its length, the readings from the RG-9 will vary, so you need to perform a simple calibration.

Just please, connect everything, and:

  • note the rain sensor (CloudWatcher software, or Solo web page) reading value when it is dry
  • then touch the RG-9 surface, or sprinkle a few drops of water, until the reading lowers
  • note this new value for rain

It will report just 2 values, one for dry, one for raining. Make sure to set your dry – wet limit settings in that margin.

For example, if your reading for dry is 2000, and for rain is 500, then set:

Dry > 1500

Wet > 1400

Rain > 100

Dry and Wet should be between both values and Rain well below the lower one.

This way the CloudWatcher will interpret the Hydreon status correctly.

If you have a Solo, don’t forget to also set the unsafe by rain in the “Switch and limits” section; in this case, 1500 will do.
Do not set a value too close to the Dry or Rain reading, as it may vary slightly with temperature (so, in the example, do not set Dry > 1990 or Rain > 390).