SimCom SIM7000 Series At Command Manual page 233

OK
If no <cid> has been set by AT+CACID:
OK
Parameter
See Write Command
Write Command Response
AT+CAOPEN=<ci +CAOPEN: <cid>,<result>
d>,<server>,<port
> OK
If error is related to ME functionality:
+CME ERROR: <err>
Parameters
<cid>
<server> Alphanumeric ASCII text string up to 64 characters. Server IP
address or host name.
<port> Interger. Server port.
<result>
Parameter Saving NO_SAVE
Mode
Max Response -
Time
Reference Note
SIM7000 Series_AT Command Manual_V1.03
see AT+CACID
0 Success
1 Status error
2 Configure type error
3 Parameter invalid
4 TCP connect error
5 UDP create error
6 Configuration load error
7 Socket add error
8 Certificate's time expired
9 Certificate's common name does not match
10 Certificate's common name does not match and time expired
11 Connect failed error
12 Socket handle error
13 Data length error
14 Memory error
15 Data send error
16 SSL general error
233
Smart Machine Smart Decision
2018-05-08