DIY Smart Button Gets Surprisingly Complicated
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A maker built a wireless smart button from scratch using the nRF52 microcontroller, targeting battery-powered operation with minimal power consumption. The project covers low-power wake-up strategies, wireless packet handling, handshakes, acknowledgements, and basic encryption. Custom PCBs were designed with expansion I/O for additional sensors, and all schematics, code, and 3D print files are publicly available.
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