1. A system, comprising: a plurality of devices each including a sensor and each configured to communicate with other devices; and a controller configured to provide command information to the plurality of devices, wherein in the command information specifies: a first mode of operation in which the plurality of devices transmit communication signals, and wherein a given device modifies a strength of a communication signal from an initial strength to a final strength in accordance with communication signals received by the given device from one or more other devices; and a second mode of operation in which the plurality of devices transmit communication signals, and wherein the given device dynamically adjusts a strength of the communication signal in accordance with measurements performed by the sensor in the given device and communication signals received by the given device from one or more other devices.