
SARA-R4/N4 series - AT Commands Manual
UBX-17003787 - R09
10 V24 control and V25ter
Page 96 of 307
10.4 DSR override &S
&S
SARA-R404M SARA-R410M-01B SARA-R410M-02B SARA-R410M-52B SARA-R412M
Modules
SARA-N4
Syntax
PIN required
Settings saved Can be aborted
Response time Error reference
Attributes
full
No
No
-
10.4.1 Description
Selects how the module will control RS232 circuit 107 - Data Set Ready (DSR).
10.4.2 Syntax
Type
Syntax
Response
Example
Action
AT&S[<value>]
OK
10.4.3 Defined values
Parameter
Type
Description
<value>
Number
•
0: sets the DSR line to ON
•
1 (default value and factory-programmed value): sets the DSR line to ON in data
mode and to OFF in command mode
10.4.4 Notes
• See the corresponding module system integration manual for the DSR behavior during the initialization
phase of the module.
10.5 Flow control &K
&K
SARA-R404M SARA-R410M-01B SARA-R410M-02B SARA-R410M-52B SARA-R412M
Modules
SARA-N4
Syntax
PIN required
Settings saved Can be aborted
Response time Error reference
Attributes
full
No
No
-
10.5.1 Description
Controls the flow control mechanism. The following settings are allowed:
• No flow control
• HW flow control also referred with RTS / CTS flow control
• SW flow control also referred with XON / XOFF flow control
10.5.2 Syntax
Type
Syntax
Response
Example
Action
AT&K[<value>]
OK
10.5.3 Defined values
Parameter
Type
Description
<value>
Number
•
0: disable DTE flow control
•
3 (default and factory-programmed value): enable the RTS/CTS DTE flow control
•
4: enable the XON/XOFF DTE flow control
•
5: enable the XON/XOFF DTE flow control
•
6: enable the XON/XOFF DTE flow control
10.5.4 Notes
• The command handling is the same for <value> parameter 4, 5 or 6.