I would really appreciate a tip from a Home Assistant expert on how to tackle the following problem:
I use several Shelly Flood devices. These WiFi-enabled devices generate an alarm in case of a water leakage.
The Shelllies are very conservative in battery usage which is, in principle, a great feature. I.e., they are generally triggered by leakage event. In addition, they connect to the WiFi and send an update about their status every couple of hours. Otherwise they are in sleep mode and thus disconnected from the WiFi.
When the sensor is disconnected from the WiFi, the sensor disappears from HA yielding an error message in the Lovelace interface that a sensor with such a name does not exist.
How can I avoid this error? For example, it is possible to store and show the sensor value until the next update?
Thanks ins advance and kind regards!