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Bluetooth Low Energy

Justin Bergen
Justin Bergen

High-level intro to Bluetooth Low Energy (BLE or Bluetooth Smart). This talk was given at Boulder iOS Meetup in 2016.

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Bluetooth Low-energy Justin Bergen @thenighttrader / 鍖ve3apps.com
About Me Started Mac development in 2009 iOS development since 2012 Current do iOS consulting under Five3 Apps
Bluetooth Low-Energy (BLE) Low energy and wireless Bluetooth 4.0 (subset) Sometimes known as Bluetooth Smart Supported by iOS 5+ (usable 7+) CoreBluetooth Does not require MFI certi鍖cation!
Why BLE? Energy ef鍖cient - Can run on a coin cell battery for months Responsive - Able to easily handle 30ms update interval (33fps) Not a good 鍖t for high bandwidth needs
How BLE Works Generic Access Pro鍖le (GAP) - Known as advertising - Limited to 31 bytes of data, plus another 31 bytes of scan response data - This is how iBeacon works
How BLE Works Generic Attribute Pro鍖le (GATT) - Connected, 1:1 communication - Advertising stops - Central initiates data requests
How BLE Works Generic Attribute Pro鍖le (GATT) - Pro鍖le (logical) - Services - Characteristics

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Bluetooth Low Energy

  • 2. About Me Started Mac development in 2009 iOS development since 2012 Current do iOS consulting under Five3 Apps
  • 3. Bluetooth Low-Energy (BLE) Low energy and wireless Bluetooth 4.0 (subset) Sometimes known as Bluetooth Smart Supported by iOS 5+ (usable 7+) CoreBluetooth Does not require MFI certi鍖cation!
  • 4. Why BLE? Energy ef鍖cient - Can run on a coin cell battery for months Responsive - Able to easily handle 30ms update interval (33fps) Not a good 鍖t for high bandwidth needs
  • 5. How BLE Works Generic Access Pro鍖le (GAP) - Known as advertising - Limited to 31 bytes of data, plus another 31 bytes of scan response data - This is how iBeacon works
  • 6. How BLE Works Generic Attribute Pro鍖le (GATT) - Connected, 1:1 communication - Advertising stops - Central initiates data requests
  • 7. How BLE Works Generic Attribute Pro鍖le (GATT) - Pro鍖le (logical) - Services - Characteristics