An elevator system having an object tracking functionality, the elevator system comprising: at least one elevator shaft along which at least one elevator car is configured to travel between a plurality of floors (106a-106n), at least one elevator interface device on each floor (106a-106n) comprising one receiver device of a plurality of receiver devices (110a-110n), wherein the plurality of receiver devices (110a-110n) form a wireless mesh network , a computing unit , at least one gateway device for providing connection between the wireless mesh network and the computing unit , and one or more tag devices , each attached to an object , wherein each of the plurality of receiver devices (110a-110n) is configured to: monitor advertisement signals transmitted by the one or more tag devices within an operational range of said receiver device (110a-110n), wherein each advertisement signal comprises an identifier for identifying the tag device transmitting said advertisement signal, and provide device data associated with each detected advertisement signal to the computing unit via the wireless mesh network and the at least one gateway device , wherein the device data comprises signal strength value of the detected advertisement signal and the identifier of the detected advertisement signal, wherein the computing unit is configured to define a location of the object based on the provided device data associated with the tag device attached to said object . at least one elevator shaft along which at least one elevator car is configured to travel between a plurality of floors (106a-106n), at least one elevator interface device on each floor (106a-106n) comprising one receiver device of a plurality of receiver devices (110a-110n), wherein the plurality of receiver devices (110a-110n) form a wireless mesh network , a computing unit , at least one gateway device for providing connection between the wireless mesh network and the computing unit , and one or more tag devices , each attached to an object , wherein each of the plurality of receiver devices (110a-110n) is configured to: monitor advertisement signals transmitted by the one or more tag devices within an operational range of said receiver device (110a-110n), wherein each advertisement signal comprises an identifier for identifying the tag device transmitting said advertisement signal, and provide device data associated with each detected advertisement signal to the computing unit via the wireless mesh network and the at least one gateway device , wherein the device data comprises signal strength value of the detected advertisement signal and the identifier of the detected advertisement signal, monitor advertisement signals transmitted by the one or more tag devices within an operational range of said receiver device (110a-110n), wherein each advertisement signal comprises an identifier for identifying the tag device transmitting said advertisement signal, and provide device data associated with each detected advertisement signal to the computing unit via the wireless mesh network and the at least one gateway device , wherein the device data comprises signal strength value of the detected advertisement signal and the identifier of the detected advertisement signal, wherein the computing unit is configured to define a location of the object based on the provided device data associated with the tag device attached to said object . <EOS>