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de Winkel, J. (author)The ecological impact of today’s battery-powered Internet of Things (IoT) is troubling. Technology advancements that reduce the reliance on batteries could blunt the environmental impact of the projected billions of IoT devices. With the emergence of low-cost, small, and high-performance microcontrollers, along with more efficient micro-energy...doctoral thesis 2023
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de Winkel, J. (author), Tang, Haozhe (author), Pawełczak, Przemysław (author)We present an architecture for intermittently-powered wireless communication systems that does not require any changes to the official protocol specification. Our core idea is to save the intermediate state of the wireless protocol to non-volatile memory within each connection interval. The protocol state is then deterministically restored at...conference paper 2022
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de Winkel, J. (author), Hoefnagel, T.S. (author), Blokland, B.T. (author), Pawełczak, Przemysław (author)Debugging and testing battery-free intermittently-powered systems is notoriously difficult. This is not only due to the additional complexity of maintaining state through power failures but also due to the lack of proper tools to test and debug these systems. As a solution, we present DIPS: a fully-featured hardware debugger for battery-free...conference paper 2022
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de Winkel, J. (author), Kortbeek, V. (author), Hester, Josiah (author), Pawełczak, Przemysław (author)Any future mobile electronic device with which a user interacts (smartphone, hand-held game console) should not pollute our planet. Consequently, designers need to rethink how to build mobile devices with fewer components that negatively impact the environment (by replacing batteries with energy harvesting sources) while not compromising the...journal article 2021
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de Winkel, J. (author), Kortbeek, V. (author), Hester, Josiah (author), Pawełczak, Przemysław (author)We present ENGAGE, the first battery-free, personal mobile gaming device powered by energy harvested from the gamer actions and sunlight. Our design implements a power failure resilient Nintendo Game Boy emulator that can run off-the-shelf classic Game Boy games like Tetris or Super Mario Land. This emulator is capable of intermittent...journal article 2020