Example - SimCom SIM7500 Series Command Manual

Defined Values
<client_index>
<topic_total_len>
<payload_total_len>
<sub_topic_len>
<sub_topic>
<sub_payload_len>
<sub_payload>

3 Example

Before all MQTT related operations, we should ensure the following:
a) ensure GPRS network is available:
AT+CSQ
+CSQ: 23,0
OK
AT+CREG?
+CREG: 0,1
OK
AT+CGREG?
+CGREG: 0,1
OK
b) PDP context Enable:
SIM7500_SIM7600_SIM7800 Series_MQTT_AT Command Manual
indicate the topic and payload have been transmitted completely.
A numeric parameter that identifies a client. The range of permitted
values is 0 to 1.
The length of message topic received from MQTT server. The
range is from 1 to 1024 bytes.
The length of message body received from MQTT server. The
range is from 1 to 10240 bytes.
The sub topic packet length, The sum of <sub_topic_len> is equal
to <topic_total_len>.
The sub topic content.
The sub message body
<sub_payload_len> is equal to <payload_total_len>.
The sub message body content.
Smart Machine Smart Decision
packet length, The
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sum of