User Manual

SARA-R4 series-AT commands manual
UBX-17003787 - R16
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1AT command settings
Page 14 of 401
1.1.6Information text responses and result codes
The AT command response comprises an optional information text string and a final result code that can
assume the format as follows:
• Verbose format:
Information text response(s): <S3_character><S4_character><text><S3_character><S4_character>
Final result code: <S3_character><S4_character><verbose code><S3_character><S4_character>
• Numerical format:
Information text response(s): <text><S3_character><S4_character>
Final result code: <numerical_code><S3_character>
where
• <S3_character> is the command line termination character
• <S4_character> is the linefeed character
SARA-R4 / SARA-N4
The V AT command configures the result code in numeric or verbose format.
The command line termination character can be set with S3 AT command.
The linefeed character can be set with S4 AT command.
Table 1 lists the allowed result codes.
Verbose Numeric Result code type Description
OK 0 Final Command line successfully processed and the command is
correctly executed
CONNECT 1 Intermediate Data connection established
RING 2 Unsolicited Incoming call signal from the network
NO CARRIER 3 Final Connection terminated from the remote part or attempt to
establish a connection failed
ERROR 4 Final General failure. The AT+CMEE command configures the error
result format
NO DIALTONE 6 Final No dialtone detected
BUSY 7 Final Engaged signal detected (the called number is busy)
NO ANSWER 8 Final No hang up detected after a fixed network timeout
CONNECT<data rate> 9 Intermediate Same as CONNECT including also the data rate (data call).
NOT SUPPORT 10 Final Operation not supported
INVALID COMMAND LINE 11 Final Invalid command line
CR 12 Final Carriage return
SIM DROP 13 Final SIM not inserted
Command aborted 3000 Final Command execution aborted issuing a character to the DCE
DISCONNECT 14 Final Data connection disconnected
Table 1: Allowed result codes
SARA-R4 / SARA-N4
The DISCONNECT result code is not supported.
SARA-R4 / SARA-N4
These result codes are not supported: NOT SUPPORT, INVALID COMMAND LINE, CR, SIM DROP.
As already stated in the Preface section (see the "Can be aborted" attribute), some AT commands can be
aborted after having issued them.
SARA-R4 / SARA-N4
The AT commands cannot be aborted, except if explicitly stated in the corresponding AT command
description.
Intermediate outputs as well as descriptive outputs of a command are formatted as information text
responses; if more than one string has to be printed out (see for example the +CGDCONT command
description), additional command line termination and linefeed characters may be inserted for sake of
readability.
If the command is not accepted by the MT an error result code will be displayed. The AT+CMEE command
configures the error result code format as follows: