Associating each of a plurality of an Internet of Things (IoT) devices with a different attendee at an event, the IoT devices configured to form local wireless connections with one or more IoT hubs or client devices; as a first attendee moves around the event, periodically establishing a local wireless connection between a first IoT device associated with the first attendee and the IoT hubs or client devices within range of the first IoT device; transmitting one or more data packets from the IoT hubs or client devices to an IoT service over the Internet, the data packets including data identifying the first attendee, the first IoT device, and the IoT hubs or client devices to which the first IoT device establishes the local wireless connections, the IoT service storing the data in a database and using the data to determine portions of the event visited by the first attendee.