While increasing the number of Internet of Things (IoT) sensors, maintaining cost and pollution of batteries become a significant problem. Battery-less systems supported by harvesting ambient energy offer potential solutions for IoT sensors. However, the weak and unstable ambient energy makes the battery-less sensor execute intermittently, such that the latency-constrained application maybe fail to respond timely. Moreover, the I/O operations can only perform rollback instead of restoring, which introduces significant energy waste and leads to low system progress. To provide responsiveness of applications and avoid energy waste by frequent rollback, we propose a framework named ”FASE”, which supports multiple asynchronous I/O operations and energy isolation assistance for battery-less systems. Our proposal is evaluated on a real platform with up to 78% meet ratio improvement and 75% meet of progress ratio improvement against the state-of-the-art works.

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