Method for remote validation of an alarm situation at a person in a home, comprising : - determining by a processing unit of an alarm situation on the basis of data received from a wireless sensor network provided in said home, the wireless sensor network comprising one or more sensors provided with a microcontroller and a central unit, wherein at least one sensor is provided with microphone and loudspeaker functionality, said central unit being adapted to receive wireless data transmitted by each of said sensors, - informing by said processing unit based on data stored in said processing unit one or more care providers that an alarm situation is occurring at said person in said home, - sending out of a notification signal that said alarm situation is occurring by said processing unit to said central unit, - upon receiving said notification signal in said central unit from said processing unit, said central unit switching said at least one sensor having microphone and loudspeaker functionality from a first mode wherein said at least one sensor having microphone and loudspeaker functionality is periodically awakened with a given interval to check for an incoming audible call via said central unit so as to limit energy consumption, to an increased vigilance second mode, wherein at least one sensor having microphone and loudspeaker functionality increases, compared to said first mode, the frequency of checks whether there is via said central unit an incoming call from said one or more care providers and wherein said incoming audible call is prepared in said central unit by making available said microphone and loudspeaker functionality in said at least one sensor of said wireless sensor network, - establishing a conversation between one of said care providers and said person via said one or more sensors having microphone and loudspeaker functionality to validate said alarm situation. - determining by a processing unit of an alarm situation on the basis of data received from a wireless sensor network provided in said home, the wireless sensor network comprising one or more sensors provided with a microcontroller and a central unit, wherein at least one sensor is provided with microphone and loudspeaker functionality, said central unit being adapted to receive wireless data transmitted by each of said sensors, - informing by said processing unit based on data stored in said processing unit one or more care providers that an alarm situation is occurring at said person in said home, - sending out of a notification signal that said alarm situation is occurring by said processing unit to said central unit, - upon receiving said notification signal in said central unit from said processing unit, said central unit switching said at least one sensor having microphone and loudspeaker functionality from a first mode wherein said at least one sensor having microphone and loudspeaker functionality is periodically awakened with a given interval to check for an incoming audible call via said central unit so as to limit energy consumption, to an increased vigilance second mode, wherein at least one sensor having microphone and loudspeaker functionality increases, compared to said first mode, the frequency of checks whether there is via said central unit an incoming call from said one or more care providers and wherein said incoming audible call is prepared in said central unit by making available said microphone and loudspeaker functionality in said at least one sensor of said wireless sensor network, - establishing a conversation between one of said care providers and said person via said one or more sensors having microphone and loudspeaker functionality to validate said alarm situation. <EOS>