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Adafruit ItsyBitsy nRF52840 Express - Bluetooth LE : ID 4481 : Adafruit Industries, Unique & fun DIY electronics and kits
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Fingernail-sized BLYST840 nRF52840 Module Features Bluetooth 5.2, Thread, Zigbee and 46 I/O (Crowdfunding) - CNX Software
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