SimCom SIM7800 Series User Manual

Smart Machine Smart Decision
SIM7500_SIM7600_SIM7800 Series_MQTT_AT Command Manual 27 / 41
10 client index error
11 no connection
12 invalid parameter
13 not supported operation
14 client is busy
15 require connection fail
16 sock sending fail
17 timeout
18 topic is empty
19 client is used
20 client not acquired
21 client not released
22 length out of range
23 network is opened
24 packet fail
25 DNS error
26 socket is closed by server
27 connection refused: unaccepted protocol version
28 connection refused: identifier rejected
29 connection refused: server unavailable
30 connection refused: bad user name or password
31 connection refused: not authorized
32 handshake fail
33 not set certificate
2.3.2 Unsolicited result codes
2.3.2.1 Disconnected by server
Unsolicited codes
+CMQTTCONNLOST:
<client_index>,<cause>
When client disconnect passively, URC
“+CMQTTCONNLOST” will be reported, then user need to
connect MQTT server again.
Defined Values
<client_index>
A numeric parameter that identifies a client. The range of permitted
values is 0 to 1.
<cause>
The cause of disconnection.

SimCom SIM7800 Series Specifications

General

Brand	SimCom
Model	SIM7800 Series
Category	Control Unit
Language	English