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    Bluetooth: use recommended LE connection parameters · 0e833915
    Anderson Lizardo 提交于
    The new connection parameters now match the recommended values for
    Proximity and Health Thermometer profiles. The previous values were
    ramdomly chosen, and are either too low or too high for most cases.
    
    New values:
    
    Scan Interval: 60 ms
    Scan Window: 30 ms
    Minimum Connection Interval: 50 ms
    Maximum Connection Interval: 70 ms
    Supervision Timeout: 420 ms
    
    See "Table 5.2: Recommended Scan Interval and Scan Window Values" and
    "Table 5.3: Recommended Connection Interval Values" for both profiles
    for details. Note that the "fast connection" parameters were chosen,
    because we do not support yet dynamically changing these parameters from
    initiator side.
    
    Additionally, the Proximity profile recommends (section "4.4 Alert on
    Link Loss"):
    
    "It is recommended that the Link Supervision Timeout (LSTO) is set to 6x
    the connection interval."
    
    Minimum_CE_Length and Maximum_CE_Length were also changed from 0x0001 to
    0x0000 because they are informational and optional, and old value was
    not reflecting reality.
    Signed-off-by: NAnderson Lizardo <anderson.lizardo@openbossa.org>
    Signed-off-by: NGustavo F. Padovan <padovan@profusion.mobi>
    0e833915
hci_conn.c 21.7 KB