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Philips Semiconductors
UM_1SPP
BGB203 BT 2.0 Serial Port Profile Module User’s Guide
OK
AT+BTESC=2, \x2B, \x2B
OK
+BTLSV – read/write Bluetooth link supervision timeout
Description:
This command is used to query (or set) the Bluetooth link supervision
timeout that is used for an active serial port connection. The link
supervision timeout specifies the amount of time that the Bluetooth radio
will maintain a connected link when no radio communication is detected.
If the Bluetooth radio does not receive a response to Bluetooth link
manager protocol messages in the allotted time, the link will be
disconnected. This parameter is particularly useful when the local device
needs wants to be notified when the remote Bluetooth device (which is
connected) leaves radio range.
It should be noted that this timeout is not related to actual serial port
data transmitted across the link, but rather internal Bluetooth link
manager protocol. This means that the device does NOT have to
transmit serial port data to keep the link supervision timeout from
expiring. The default link supervision timeout is the Bluetooth default 20
seconds. Note that if the link supervision timeout is changed it will not be
saved to Flash (unless the save to Flash command is used afterward).
Format:
AT+BTLSV=<X>
where,
<X> is an integer value that represents the new link supervision
timeout. This value is specified in seconds and must be
between the range of 2 seconds and 40 seconds (inclusive).
This value can either be specified as an integer value (base 10)
or a hexadecimal value (preceded by “ \x ” or “ \X ” without the
quotation marks 0x02 – 0x28).
or one of the following to query the current link supervision timeout value:
AT+BTLSV?
AT+BTLSV
Results:
If a query is performed, the output will be the following format:
+BTLSV: <X>
where,
<X> is an integer value that represents the currently configured
? Koninklijke Philips Electronics N.V. 2005
All rights are reserved. Reproduction in whole or in part is prohibited without the prior
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consequence of its use. Publication thereof does not convey nor imply any license under
patent- or other industrial or intellectual property rights.
Date of release:21 Dec 2005
Published in The Netherlands
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