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IoT devices are decentralized and deployed in un-stable environments, whichcauses them to be prone to various kinds of faults, such as device failure andnetwork disruption. Yet, current IoT platforms require programmers to handlefaults manually, a complex and error-prone task. In this paper, we presentIoTRepair, a fault-handling system for IoT that (1)integrates a faultidentification module to track faulty devices,(2) provides a library offault-handling functions for effectively handling different fault types, (3)provides a fault handler on top of the library for autonomous IoT faulthandling, with user and developer configuration as input. Through an evaluationin a simulated lab environment and with various fault injectionmethods,IoTRepair is compared with current fault-handling solutions. The faulthandler reduces the incorrect states on average 50.01%, which corresponds toless unsafe and insecure device states. Overall, through a systematic design ofan IoT fault handler, we provide users flexibility and convenience in handlingcomplex IoT fault handling, allowing safer IoT environments.

IoTRepair: Systematically Addressing Device Faults in Commodity IoT (Extended Paper)