Abstract: System and method enable rapid prototyping of an Internet of Things (IoT) device equipped with a modem. The system creates an abstraction layer subsuming a modem AT command set, where the abstraction layer provides a higher-level functionality than the modem AT command set. A function associated with the abstraction layer includes multiple function calls to the modem AT command set. The system can receive an input indicating an instruction to initiate a connection between the modem and a telecommunication network. The system can invoke a particular function associated with the abstraction layer to establish the connection between the modem and the telecommunication network.

Abstract: In emergency or search-and-rescue operations, user devices such as phones may transmit signals that indicate people may be located nearby. The signals can be detected by one or more rover devices, which can explore dangerous terrain for indications of people to be rescued. The user devices can activate an application that conserves battery power while emitting a signal, in some cases in a round robin configuration to further conserve power. The rover devices, or other devices that make contact with the user devices, can collect and manipulate data about the user devices to aid a rescue operation.