EMQSUBCLOSE – cancel a subscription to a message topic

Cancel a subscription to a topic.

Type	Syntax	Returned result
Test	AT+EMQSUBCLOSE=?	OK and +EMQPUBOPEN:(0-7)
Read	AT+EMQSUBCLOSE?	OK or ERROR
Write	AT+EMQSUBCLOSE=(0-7)	OK, +EMQSUBCLOSE:(0-7), or ERROR

For the Write command, set a subscribe index from 0 through 7. Subscribe to the selected index first. The response status is 0 when it cancels the subscription, -1 when the broker returns an unsubnack, or -2 when no topic exists.

Example

AT+EMQSUBCLOSE=0
OK
+EMQSUBCLOSE: 0,0

AT+EMQSUBOPEN?
OK
+EMQSUBOPEN topics:
0 null
1 SubscribeFromCloud1/AWSthingName
2 null
3 null
4 null
5 null
6 null
7 null