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4 Commits

Author SHA1 Message Date
Jim Mussared 76f474129e extmod/modbluetooth: Use us instead of ms for advertising interval. 
This is to more accurately match the BLE spec, where intervals are
configured in units of channel hop time (625us). When it was
specified in ms, not all "valid" intervals were able to be
specified.

Now that we're also allowing configuration of scan interval, this
commit updates advertising to match.
 2019-10-11 13:51:07 +11:00
Jim Mussared b65cc387cd extmod/modbluetooth: Allow config of scan interval/window. 
This adds two additional optional kwargs to `gap_scan()`:
  - `interval_us`: How long between scans.
  - `window_us`: How long to scan for during a scan.

The default with NimBLE is a 11.25ms window with a 1.28s interval.

Changing these parameters is important for detecting low-frequency
advertisements (e.g. beacons).

Note: these params are in microseconds, not milliseconds in order
to allow the 625us granularity offered by the spec.
 2019-10-11 13:51:07 +11:00
Andrew Leech eb1b6858a2 extmod/modbluetooth: Allow MP_BLUETOOTH_MAX_ATTR_SIZE in board config. 2019-10-01 09:51:02 +10:00
Jim Mussared 16f8ceeaaa extmod/modbluetooth: Add low-level Python BLE API. 2019-10-01 09:51:02 +10:00