32
Function Description
WAGO-I/O-SYSTEM 757
757-801 Bluetooth® Module RS-232
Manual
1.0.0
Table 17: Operating modes
Power
Interruptions
Operating Modes
-
I
Normal operation
The device is operated normally. The previously configured settings are
used.
1 x
II
Preparation for switching of operating mode
Automatic switching to normal operation. This mode serves only to
protect against accidental activation of mode switching, e.g. during
fluctuations in the power supply.
2 x
III “AutoConnect”
The device attempts to connect to another device of the same kind
automatically. When successful, the configuration of both devices is
modified, so that the connection is restored automatically among other
things after a power failure in the future.
For this purpose, the following settings are adjusted:
•
Destination address for the outbound connection
•
Destination port for the outbound connection
•
Application of the target device in the list of allowed devices
•
Enable automatic reconnect (on one of the two radio adapters only)
3 x
IV Reset to factory settings
All functionally relevant device settings (including the baud rate of the
wired serial interface) are reset to their original values. The device then
restarts automatically.
The specific LED flashing patterns for the set modes are given in the section
“Device Description”> … >“Display Elements.”
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4.5
Security Settings for the Radio Communications
Interface
The device supports all security mechanisms of Version 2.1 of the
Bluetooth
®
standard. To adjust security-related behavior, certain AT commands are also
available (e.g. commands of the “AT BTSEC” group).
Radio link only with correct security settings!
The
Bluetooth
®
standard attaches great importance to security. Consequently, a
radio link may only be set up when the security settings for the devices to be
linked are compatible and correct.
4.5.1
Visibility and Connectivity
Bluetooth
®
devices can be used to search for devices that are within range. In
addition, device names and available services of the devices found can be queried.
Visibility of the WSA
The device can be configured such that it replies always, never, or only when no
data link exists. The AT command “AT BTSEC INQ” is used for configuring this
setting.
