This tool show the status of the safety monitor, when the light is green it is safe to open the observatory for observing, for example it not rain.

For this tool to work you need to setup the driver and eventually configure the actions to take automatically when the condition change to bad.

This is related but independent of the Weather station. Some sensors of the safety monitor can be related to the weather but not only. You can also be interested to monitor the UPS status to be sure you have enough battery to close the dome in case of power outage.