SIM5300E AT Command Manual V1.02
If fail, return:
+CDNSGIP:0,<dns error code>
Parameters
<domain name> A string parameter which indicates the domain name
<IP1>
A string parameter which indicates the first IP address
corresponding to the domain name
<IP2> A string parameter which
indicates the second IP address
corresponding to the domain name
<dns error code> A numeric parameter which indicates the error code
8 DNS COMMON ERROR
3 NETWORK ERROR
There are some other error codes as well.
Reference
7.2.16 AT+CIPHEAD Add an IP Head at the Beginning of a Package
Received
AT+CIPHEAD Add an IP Head at the Beginning of a Package Received
Test Command
AT+CIPHEAD=?
Response
+CIPHEAD: (list of supported <mode>s)
OK
Read Command
AT+CIPHEAD?
Response
+CIPHEAD: <mode>
OK
Write Command
AT+CIPHEAD=<mode>
Response
OK
If error is related to ME functionality:
+CME ERROR: <err>
Parameters <mode>
A numeric parameter which indicates whether an IP header is
added to the received data or not.
0 Not add IP header
1 Add IP header, the format is:
1) For single IP connection (+CIPMUX=0)
+IPD,<data length>:
2) For multi IP connection (+CIPMUX=1)