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Function Description
WAGO-I/O-SYSTEM 757
757-801 Bluetooth® Module RS-232
Manual
1.0.0
Table 14: SPP services
SPP Port Index Designation
Function
1
DATA
Data exchange
2
CONFIG
Configuration
Simultaneous use of both SPP services is supported, meaning two radio links to
one external device, or one radio link each to two different external devices can
exist at the same time.
The “DATA” SPP service is the standard when links are established!
Devices compliant with the
Bluetooth
®
SPP standard can select the service to
which a link is to be set up while the link is being established. Not all devices,
however, offer the user the option of selecting the SPP service. Devices which do
not offer this selection option frequently select the SPP service with the lowest
port index automatically. If a link to the WSA is set up using such a device, the
SPP service “DATA” is used.
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4.1.1
SPP Service “DATA”
This service enables access to the RS-232 interface, allowing the WSA to function
as a media converter or as a protocol converter.
Links which are set up by the WSA to an external device always utilize the
“DATA” SPP service.
4.1.2
SPP Service “CONFIG”
This service enables access to the AT command interface and, thus, to the device
configuration. For a detailed description of this refer to the section “AT Command
Interface”.
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4.2
AT Command Interface
Access to the AT command interface of the WSA is gained either via the RS-232
interface, or via the radio interface, but not via both of these simultaneously.