1. A system, comprising: a sensor that is configured to generate sensor data that reflects an environmental condition of a vicinity of the sensor; a radio module that is configured to receive beacon signals from one or more radio beacons; a processor that is configured to: determine a power level and a directionality of each of the beacon signals; based on the power level and the directionality of each of the beacon signals, determine a number of people who are likely located in the vicinity of the sensor; and based on the sensor data, adjust the number of people who are likely in the vicinity of the sensor; and an output module that is configured to output data indicating the adjusted number of people who are likely in the vicinity of the sensor.