Homematic IP starter set water alarm with an Access Point central control unit, a water sensor and an alarm siren The starter set water alarm detects and reports water eruptions so that countermeasures can be taken immediately and water damages can be avoided or minimised. The Access Point acts as the central control unit for teaching-in the components and establishing the connection between the cloud and the smartphone via a router. The water sensor differentiates between moisture and a water level of 1.5 mm or more. In these cases, depending on the configuration, the alarm siren triggers an acoustic and optical alarm, the water sensor’s integrated siren triggers an acoustic alarm and the connected smartphone receives a push message. The set can be extended by additional water sensors for monitoring other areas or smoke alarms to supplement the fire protection. Features / compatibility - Homematic IP integrates the areas of indoor climate, security, fire and water protection, weather,