Advanced Bluetooth for Android Developers
summary
Claims include >1 km range with LE Coded PHY and FEC, and networks of “tens of thousands” via Bluetooth Mesh. Android specifics: use BluetoothLeScanner, GATT and proxy service, increase MTU and enable LE Data Length Extension, request LE 2M PHY and short connection intervals. Measured numbers: transferring 100 KB with default MTU and 1 Mbps takes ~8 s, tuned settings drop to ~0.5 s; using write requests goes from ~500 s down to ~10 s. Enhanced ATT (5.2) adds flow control.
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chapters (28)
- 0:00Start
- 0:58Two Bluetooth Communications Technologies
- 1:40Bluetooth Mesh
- 2:00Basics
- 4:21Descriptors
- 4:50The Bluetooth Low Energy Stack on an Android
- 7:48Coexistence and Co-Location
- 9:00The Modulation Scheme
- 10:34Air Interface Packets
- 10:53Preamble
- 11:13Access Address
- 11:53Cyclic Redundancy Check
- 13:26Spread Spectrum
- 14:03Adaptive Frequency Hopping
- 15:45Extended Advertising
- 16:45Maximize Data Transfer Rates with Bluetooth Low Energy
- 18:01Application Data Rate
- 19:06Maximum Transmission Unit Size
- 20:45Ledata Packet Length Extension
- 21:03Connection Events
- 24:24The Attribute Protocol
- 26:33Summary
- 28:52Range in Bluetooth Low Energy
- 30:34Bit Error Rate or Ber
- 31:40Forward Error Correction
- 35:37Proxy Role
- 37:49Direction Finding
- 40:34Isochronous Channels
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