Serialio BlueSnapXP User Manual page 16

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The default profile is Serial Port Profile (SPP). The firmware also supports the DUN profile in both master and
slave modes. To change the profile, use the "S~,<num>" command.
Profile:
0 - Default SPP. (no modem control)
1 - DUN DCE (slave or gateway).
2 - DUN DTE ( master or client).
3 - MDM SPP with modem control signals.
The most common use of DUN profile is to enable a BT client to connecti to a dialup modem. For this mode, use
profile 1 (DUN DCE) via command "S~,1" . You may also want to set the Class Of Device so that clients can
recognize the device as a Bluetooth modem. The correct COD for a Bluetooth modem is 0x040210. This can be
set using the commands below:
"SC,0004"
"SD,0210"
A number of modem control signals are supported when in DUN or MDM modes and their use is described below.
4.2 PIOs used as modem control signals
The BlueSnap modules have the ability to replicate the required modem control hardware signals automatically
once a connection is made. These signals are transferred outside the data channel (using RFCOMM control
channels) and are automatically updated. The default SPP profile (profile=0) does NOT drive these signals or
report back inputs. If DUN or MDM profiles are enabled (pofile =1,2, or 3), the following signals are
automatically driven and received.
Inputs: (read and sent back over Bluetooth to the remote host).
PIO3 = DCD ( switch 2)
PIO6 = DSR (switch 3)
PIO7 = CTS (switch 4)
Outputs: (sent from the remote Bluetooth host, and driven out )
PIO10 = DTR
PIO11 = RTS
Inputs and outputs are ACTIVE LOW.
On the BlueSnap, the DIP switches can also be used to set/clear the DCD, CTS, and DSR signals. DTR and RTS
are available on the 9 pin header as well.
5. Command Quick Reference
SET COMMANDS
Cedar Park, TX, USA
BlueSnap Commands Version 4.81SIO,
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(512) 994-3630 sales@serialio.com
1/20/2016
FACTORY SETTING
www.serialio.com
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