Building a BT 4.0 LE HID device
2 likes1,442 views
Building a BT 4.0 LE HID device, a talk at London Bluetooth Hardware Developers http://meetup.com/London-Bluetooth-Hardware-Developers/
![#LBTHD
Simple
Quick to learn
Can achieve a lot
Some oddities
.IDEAL
Bluetooth 4 LE
BLUETOOTH SPECIFICATION Version 4.0 [Vol 3] page 485 of 656
Attribute Protocol (ATT)
Unlikely Error 0x0E The attribute request that was
requested has encountered an error
that was unlikely, and therefore could
not be completed as requested.
Insufficient Encryption 0x0F The attribute requires encryption
before it can be read or written.
Unsupported Group Type 0x10 The attribute type is not a supported
Name Error Code Description](https://image.slidesharecdn.com/presentation-140625090418-phpapp02/85/Building-a-BT-4-0-LE-HID-device-11-320.jpg)
Building a BT 4.0 LE HID device
- 1. London Bluetooth Hardware Developers Sponsored by Venue #LBTHD .IDEAL
- 2. Apple iBeacon Technology Overview Vladimir Petrov @VladPetro鍖 諮 諮 諮 Deploying beacons in a retail environment Tim Woolford @tim_woolford Introduction to Avnet and Bluegiga BLE121LR Alastair Worth @wirelessworthy Blueberry Bar, across the road #LBTHD Building a BT 4.0 LE HID device Nick Brook @nrbrook .IDEAL
- 3. #LBTHD .IDEAL Building a BT 4.0 LE HID device Nick Brook @nrbrook
- 4. #LBTHD Bluetooth foot pedal Supports up to 4 pedals Used primarily with music display Apps, turning pages .IDEAL AirTurn BT-105
- 5. #LBTHD Bluetooth 2.1 HID device Bluetooth keyboard iOS Doesnt provide access to key events (directly, <7) Hides the virtual keyboard Requires hacks .IDEAL AirTurn BT-105
- 6. #LBTHD Provides direct access to Bluetooth 4 LE devices Introduced iOS 5 Good device support .IDEAL CoreBluetooth
- 7. #LBTHD AKA Bluetooth Smart Entirely new protocol stack (vs Bluetooth Classic) Peripheral (Server) advertises services Central (Client) scans and connects to devices .IDEAL Bluetooth 4 LE
- 9. #LBTHD 31 byte advertising packet + scan response GATT Database Services Characteristics (key -> value store) Up to 512 bytes Read, write, notify .IDEAL Bluetooth 4 LE
- 10. #LBTHD Some services de鍖ned by Bluetooth SIG, e.g. Human Interface Device Device Information Battery You can de鍖ne your own services .IDEAL Bluetooth 4 LE
- 11. #LBTHD Simple Quick to learn Can achieve a lot Some oddities .IDEAL Bluetooth 4 LE BLUETOOTH SPECIFICATION Version 4.0 [Vol 3] page 485 of 656 Attribute Protocol (ATT) Unlikely Error 0x0E The attribute request that was requested has encountered an error that was unlikely, and therefore could not be completed as requested. Insufficient Encryption 0x0F The attribute requires encryption before it can be read or written. Unsupported Group Type 0x10 The attribute type is not a supported Name Error Code Description
- 12. #LBTHD Small Low cost (贈8) Low power (CR2032) Complete integrated package (radio, antenna, microcontroller, 鍖ash, GPIO, UART, I2C, PWM, ADC) Easy, simple, quick to get started BGScript .IDEAL Bluegiga BLE113
- 13. #LBTHD Dont need much circuitry around the package Power supply Any sensors/IO .IDEAL Bluegiga BLE113
- 16. #LBTHD Custom GATT service Provides pedal state change noti鍖cations Also supports HID for keyboard / mouse commands .IDEAL New AirTurn
- 17. #LBTHD Scans for / connects to devices UI provided Sends out noti鍖cations on pedal events Works in background Di鍖erent AirTurns connected to di鍖erent Apps Simple to implement No Hacks!! .IDEAL New framework
- 18. #LBTHD Growing number of freelance projects Get in touch @nrbrook nick@nickbrook.me Speak to me! Please give feedback! http://goo.gl/HgSrgu .IDEAL LE + mobile projects