An embodiment of the invention may include a method, computer program product and system for managing a sensor area network. An embodiment may include, in response to receiving a geofence trigger event from an Internet of Things device, determining whether to add the Internet of Things device to a sensor area network of Internet of Things devices within a geofence area based on a validation technique. An embodiment may include, in response to determining to add the Internet of Things device, updating the sensor area network with information associated with the Internet of Things device. An embodiment may include enabling sharing of information within the sensor area network between member devices of the sensor area network and the Internet of Things device.