Westermo GDW-11 - Manual (Page 5)

AT command syntax 5 6615-2220
If verbose responses are enabled with command V1 and all commands in a command
line has been performed successfully, result code OK is sent
from the TA to the TE. If numeric responses are enabled with command V0, result code
0 is sent instead.
If verbose responses are enabled with command V1 and subparameter values of a com-
mand are not accepted by the TA (or command itself is invalid, or command cannot be
performed for some reason), result code ERROR is sent to
the TE and no subsequent commands in the command line are processed. If numeric
responses are enabled with command V0, result code 4 is sent instead. ERROR
(or 4) response may be replaced by +CME ERROR: see appendix when com-
mand was not processed due to an error related to ME operation.
Responses and result codes
Responses start and end with (except for the ATV0 DCE response format)
and the ATQ1 (result code suppression) commands.
… If command syntax is incorrect, the “ERROR” string is returned.
… If command syntax is correct but transmitted with wrong parameters, the +CME
ERROR: or +CMS ERROR: strings is returned with adequate
error codes if CMEE was previously set to 1. By default, CMEE is set to 0, and the
error message is only “ERROR”.
… If the command line has been executed successfully, an “OK” string is returned.
The TA response for the example command line of figure 1 could be as shown in figure
2. Here, verbose response format is enabled with command V1. If numeric format V0
would have been used, headers of information responses would have been
left out and final result code changed to 0.
Figure 2: Response to a
command line
+CMD2: 3,0,15,"GSM"
+CMD2: (0-3),(0,1),(0-12,15),("GSM","IRA")
OK
information response to +CMD2?
information response to +CMD2=?
final result code
also string type subparameters possible
shows acceptable ranges of each subparameter
So called intermediate result codes inform about progress of TA operation (e.g. connec-
tion establishment CONNECT), and so called unsolicited result codes indicate occur-
rence of an event not directly associated with issuance of a command from TE (e.g. ring
indication RING).
In some cases, such as “AT+CPIN?” or (unsolicited) incoming events, the product does
not return the “OK” string as a response.
In the following examples and are intentionally omitted.