8.16. RF_ConnectionTiming: Modify the connection timing
Settings
index
Designation
Permissible
values
Default value
Permissions
Number
of
Bytes
8
0 - 8
2
read/write
1
The
enables the possibility to configure the timing behavior of the
module’s RF interface during an established connection. Using this parameter several pre-
defined configurations can be chosen, which include the minimum and maximum connection
interval, as well as the connection supervision timeout.
The choice of the
primarily determines how rapidly the connection
is established and data is transmitted. The lower the
, the more fre-
quently the connected devices communicate with each other and thus, the more power is
consumed.
0
1
2
3
4
5
6
7
8
Minimum connection
interval [ms]
8
8
20
30
50
100
200
750
2000
Maximum connection
interval [ms]
8
30
75
100
250
500
1000
2250
4000
Connection supervision
timeout [s]
4
4
4
4
4
8
8
15
25
Current consumption
High
. . .
Low
Further information:
• The minimum and maximum connection interval parameters specify the borders of the
connection interval as determined in the negotiation procedure between the central and
the peripheral during connection setup. The connection interval defines the frequency
of communication during connection setup and data transmission. If a Proteus-III mod-
ule A (central) connects to a Proteus-III module B (peripheral), the connection interval
settings of the central are used for connection setup. If both modules have different
connection interval settings the peripheral requests the central to accept the periph-
eral’s settings after 5s. The central accepts these settings, and thus the peripheral’s
connection interval is used.
If now another Bluetooth
®
LE device (e.g. a smart phone) connects as central to a
Proteus-III module (peripheral) and the connection interval settings do not coincide,
the Proteus-III requests the smart phone to accept its settings after 5s. If the cell
phone does not accept the settings, it will be requested a further 3 times with a delay
of 10s. If the peripheral’s settings request have been rejected in all cases the con-
nection will be shut down. If the smart phone itself requests to update the connection
interval of the Proteus-III, the module accepts the request. Reversely, if a Proteus-III
(central) connects to another Bluetooth
®
LE device (peripheral) and the connection in-
terval settings do not coincide, the Proteus-III accepts all requests of the peripheral to
update the connection parameter settings.
Proteus-III reference manual version 1.3
© August 2020
www.we-online.com/wireless-connectivity
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