SARA-R4/N4 series - AT Commands Manual
UBX-17003787 - R09
10 V24 control and V25ter
Page 99 of 307
Parameter
Type
Description
•
2: 8 data 1 parity 1 stop
•
3: 8 data 1 stop
•
4: 7 data 2 stops
•
5: 7 bit, 1 parity, 1 stop
•
6: 7 bit, 1 stop
<parity>
Number
•
0: odd
•
1: even
10.6.4 Notes
SARA-R4
• Automatic frame recognition is not supported (<format> cannot be set to 0).
• The only supported values are <format> = 3 and <parity> = 1.
10.7 DTE-DCE local flow cIFC
+IFC
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
-
10.7.1 Description
Controls the operation of the local flow control between DTE and DCE used when the data are sent or received.
The SW flow control (XON/XOFF) activation is only allowed in case of the text transmission: the binary data
cannot be transmitted because it may contain the special flow control characters (XON/XOFF). For the SW
flow control enhancement, allowing its usage during a PSD call with PPP L2 protocol, see
enhancement for PSD data transfer with PPP L2 protocol
When the software flow control (XON/XOFF) is used, the DC1 (XON, 0x11) and DC3 (XOFF, 0x13) characters are
reserved and therefore filtered (e.g. in SMS text mode these two characters can not be input).
Since the DTE-DCE communication relies on the correct reception of DC1/DC3 characters, the UART power
saving should be disabled on the module when SW flow control is used. If the UART power saving is active, the
DC1/DC3 characters could be used to wake up the module's UART, and therefore lost. In case a DC3 character
(XOFF) is correctly received by module's UART and some data is waiting to be transmitted, the module is forced
to stay awake until a subsequent DC1 character (XON) is received.
The software flow control (XON/XOFF) setting is not allowed on the USB interfaces, on the SPI interface
and on a multiplexer channel. See the
Multiple AT command interfaces
for all the behavior differences in
respect to the supported interfaces.
10.7.2 Syntax
Type
Syntax
Response
Example
Set
AT+IFC=[<DCE_by_DTE>[,<DTE_by_
DCE>]]
OK
AT+IFC=2,2
OK
Read
AT+IFC?
+IFC: <DCE_by_DTE>,<DTE_by_
DCE>
OK
+IFC: 2,2
OK
Test
AT+IFC=?
+IFC: (list of supported <DCE_by_
DTE>),(list of supported <DTE_by_
DCE>s)
OK
+IFC: (0-2),(0-2)
OK
