27 lines
1.2 KiB
Markdown
27 lines
1.2 KiB
Markdown
|
# micro:bit BLE profile : Tracking changes from planned specification
|
|||
|
|
|
|||
|
|
This document briefly outlines changes to the planned BLE specification made during implementation.
|
|||
|
|
These are typically made with purpose, so the rationale is also provided where possible.
|
|||
|
|
|
|||
|
|
## LEDService:
|
|||
|
|
* Lose the System LED State characteristic since it cannot be controlled from the BLE MCU.
|
|||
|
|
* Lose the Scrolling State characteristic due to complexity and memory constraints.
|
|||
|
|
|
|||
|
|
## IO Pin Service:
|
|||
|
|
* Simplify the IO Pin Service, possible to expose the edge connector pins only.
|
|||
|
|
* Possibly drop it to save memory and use the event service to transport pin values in either direction. Needs further thought.
|
|||
|
|
|
|||
|
|
## Generic Access Service:
|
|||
|
|
* Device Name and Appearance are mandatory and so need values
|
|||
|
|
* Peripheral Privacy Flag is optional and I don<6F>t think we need it.
|
|||
|
|
* Ditto Reconnection Address.
|
|||
|
|
* Ditto Peripheral Preferred Connection Parameters.
|
|||
|
|
|
|||
|
|
## Generic Attribute Service:
|
|||
|
|
* profile design doc/report doesn<73>t show it and it<69>s mandatory (issue with Bluetooth Developer Studio).
|
|||
|
|
|
|||
|
|
## Device Information Service:
|
|||
|
|
* All characteristics are optional. Which ones do we really want/need? Save a little memory.....
|
|||
|
|
|
|||
|
|
|