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Using an Arduino 101 as an Eddystone Beacon. Board Manager: Curie 2.0.2 Libary: CurieBLE 2.0.0 Specific requirements I discovered in this version of the Curie Library: — Use Eddystone UUID ("FEAA") for both Service and Characteristic — Only BLEBroadcast property is required in second BLECharacteristic constructor parameter (omit BLERead and BLEWrite if you prefer) — Be sure the third parameter in the BLECharacteristic constructor, valueSize, is at least as long as the Service Data array or the Service Data will be truncated — Do not set a Local Name for the BLE. If you do it prevents the advertisement from being configured as type ServiceData. — You must call characteristic.broadcast(); — You must call characteristic.writeValue *after* calling characteristic.broadcast Reference: Intel's GitHub Repository for the CurieBLE library https://github.com/01org/corelibs-arduino101/tree/master/libraries/CurieBLE/ Bluetooth GAP Specification (we want 0x16 for configuring the Advertisement as Service Data). This is handled by the CurieBLE library. https://www.bluetooth.com/specifications/assigned-numbers/generic-access-profile Eddystone Protocol Specification https://github.com/google/eddystone/blob/master/protocol-specification.md Eddystone URL Expansion Codes https://github.com/google/eddystone/tree/master/eddystone-url Calculating transmission power https://altbeacon.github.io/android-beacon-library/eddystone-support.html Referenced some early work by @bneedhamia https://github.com/bneedhamia/CurieEddystoneURL