Abstract: A wireless monitoring system for monitoring at least one person in a building. The wireless monitoring system comprises a data collection device and a plurality of wireless signalling devices working in a star network topology, the data collection device being adapted to wirelessly receive data transmitted from each of the plurality of wireless signalling devices. The signalling devices and the data collection device being adapted to send and receive FSK modulated signals in a predetermined single channel and the signalling devices being adapted to send data packets such as a heartbeat message to the data collection device.

Abstract: A method for validating an alarm situation in a home includes determining by a processing unit of an alarm situation on the basis of data received from the home provided with a sensor network comprising one or more sensors and a central unit; transmission by the processing unit of a message to a care provider that an alarm situation is occurring at the occupant; sending out of a notification signal by the processing unit to the central unit; upon receiving the notification signal in the central unit, switching on an increased vigilance mode, wherein a call from the one or more care providers is prepared in the central unit by making available an audio function in one or more sensors of the sensor network; validating the alarm situation by establishing a conversation between one of the care providers and the occupant via the at least one sensor.