WAGO I/O-SYSTEM 750 Manual page 158

158 Appendix
If MBX_AUTHENTICATION_LINKKEY is set as the authentication mode, an
individual "Link Key" is calculated from the configured PIN during the first
connection. The PIN is generated from the password. If this key has been
generated once, the 750-644 I/O modules are considered to be "paired"
(connected) and do not need to conduct a mutual authentication again with a new
connection. If the "Link Key" is deleted, for example when restarting the device
or by means of "EraseLocalAuthentication", then the password is requested again
in order to calculate the "Link Key". Accordingly, for Bluetooth
you are prompted to enter the password at initial or subsequent authentication. For
750-644 I/O modules, the password is archived in the Bluetooth
does not have to be reentered once it has been created correctly.
In authentication mode MBX_AUTHENTICATION_PIN, authentication is
performed with the PIN instead of using the "Link Key". For 750-644 I/O
modules, this is automatic based on the saved password. For Bluetooth
devices, the password usually has to be manually reentered each time a
connection is established.
Authentication
Authentication only ensures that communication partners verify each other's
identity. Authentication does not prevent data interception. Authentication is
required for encryption when transmitting data. 750-644 I/O modules can only
connect with each other when they have the same settings for encryption,
authentication and password.
Conditions
Mailbox size
6
●
Request
Byte
0
1
2
12 18 Config. Real-time Ad-hoc Master Slave
● ● ●
7 6
2 2
MBX_SETAUTHENTICATIONMODE
T
MBX_AUTHENTICATION_MODE
750-644 Bluetooth
Mode Device role
- -
5 4 3
2 2 2
-
Version 2.0.0, valid from FW/HW Version 03/03
WAGO-I/O-SYSTEM 750
®
RF-Transceiver
®
SPP devices,
®
subsystem and
®
SPP
Save
config.
● ● ●
2 1
2 2
Reboot
-
0
2
Manual