We need the whole xml file of this device to get it integrated. Please upload it here.
And we need the possible configuration parameters of the device. Sadly Devolo doesn’t normally state them in the manuals. But usually Devolo only rebrands the devices, so maybe you can find out who is the original manufacturer.
I’m not sure about the configuration parameters; I’m not aware of any. It should expose a binary alarm value (whether it senses water) and additionally has a switch that is meant to signal tampering (with the switch pressed down signalling normal operation).