Using the command-line interface AT commands
Digi TransPort® Routers User Guide
176
Issue the command ats16? and check that the value of this S register is 3. To set it back to RS232
then set ats16 to 0 and save it with the at&w command.
S23 Parity
Units: N/A
Default: 0
Range: 0-2,5,6
The value stored in S23 determines whether the parity for the ASY port is set to None (0), Odd (1),
Even (2), 8DataOdd (5) or 8DataEven (6).
S31 ASY Interface Speed
Units: N/A
Default: 0
Range: 0-11
Register S31 sets the speed and data format for the ASY port to which you are currently connected.
The default value for ASY 0 is 0, such as the port speed/data format is not set to a specific value, it is
determined automatically from the AT commands that you enter.
The default value for ASY 1, 2, and 3 is 3, meaning the ports only accept AT commands at 115,200 bits
per second (8 data bits, no parity and 1 stop bit).
To set the speed of one of the ports to a particular value, set the appropriate register to the required
value from the following table:
S31 Port Speed (bps) S31 Port Speed (bps)
0 Auto-detect 6 19200
1 Reserved 7 9600
2 Reserved 8 4800
3 115200 9 2400
4 57600 10 1200
5 38400 11 300
For example, to change the speed of ASY 1 to 38,400 bits per second:
1. Connect your terminal to that port with the speed set to 9600 bits per second.
2. Enter the command:
at s31=5
3. Change the speed of your terminal to 38,400 bits per second before entering any more AT
commands.
When entering the ats31=n command, the data format selected becomes the data format for all
further commands.
The auto-detect option is only available for ASY0 and ASY1.
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