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Amazon.com: DSD TECH HM-10 Bluetooth 4.0 BLE iBeacon UART Module with 4PIN Base Board for Arduino UNO R3 Mega 2560 Nano : Electronics
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HM-10. BLE. Arduino UNO. Notify. Bluetooth. AT. iBeacon. Arrhythmia - Tutorials and Guides - MIT App Inventor Community
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