CARU Smart Sensor is an intelligent communication system for people, who are restricted by age and/or illness and have an increased requirement for safety. In simplified terms, this is a cross between a baby monitor, speech-controlled telephone and emergency button, which has been fitted with a large number of additional features. The device itself, whose compact shape reminds one of a plain porcelain jar, can be integrated discreetly and unobtrusively in almost every environment. Set to plug & play in the home, it collects data about temperature, noise levels, air quality and moisture among other things, learning from what is the normal behaviour of the user and identifies deviations, about which the trusted third party or service-provider such as Spitex are informed. A conscious decision was made to do without movement sensors and cameras to protect the person's private life. CARU can also be used via speech control or a simple touch to make a telephone connection or hear a message. This means it connects people both in their everyday lives as well as in emergency situations and therefore contributes to safety and well-being.