MQTTS-Verify Server and Client

LTE AT

MQTTS-Verify Server and Client 통신연습

MQTT (Message Queuing Telemetry Transport) is a lightweight broker-based publish/subscribe messaging protocol.

It is a machine-to-machine (M2M)/”Internet of Things” connectivity protocol.

It was designed as an extremely lightweight publish/subscribe messaging transport.

It is useful for connections with remote locations where a small code footprint is required and/or network bandwidth is at a premium.

1. 통신시스템: MQTTS-Verify Server and Client

2. 명령시퀀스: MQTTS-Verify Server and Client

No	Command	Response	Description
1	PDP Context 설정
2.1	AT+CCERTDOWN= “server_ca.pem”,1602

3.1	AT+CCERTDOWN= “client_cert.pem”,1740

4.1	AT+CCERTDOWN= “client_cert.key.pem”,8383\r

–	AT+CCERTLIST
–	AT+CCERTDELE=”server_ca.pem”
5	AT+CSSLCFG=”sslversion”,0,4\		Set the SSL version of the first SSL context
6	AT+CSSLCFG=”authmode”,0,1		Set the authentication mode(verify server) of the first SSL context
7	AT+CSSLCFG=”cacert”,0, “server_ca.pem”
8	AT+CSSLCFG=”clientcert”,0,”cert.pem”\r
9	AT+CSSLCFG=”clientkey”,0,”cert.key.pem”\r
10	AT+CMQTTSTART	+CMQTTSTART: 0 OK	Start MQTT service, activate PDP context
11	AT+CMQTTACCQ=0, “client test0”	OK	Acquire one client which will connect to a MQTT server without SSL/TLS.
12	AT+CMQTTSSLCFG=0,0	OK	Set the first SSL context to be used in the SSL connection
13.1	AT+CMQTTWILLTOPIC=0,10	>	Set the topic of the will
13.2	>Topic_will	OK	Input 10 Character as topic
14.1	AT+CMQTTWILLMSG=0,6,1	>	Set the will message
14.2	>qwerty	OK	Input 6 Character
15	AT+CMQTTCONNECT=0, “tcp://hooleeping.com:8883”,60,1	OK +CMQTTCONNECT: 0,0	Connect to a MQTT server, input the right server and port.


16.1	AT+CMQTTTOPIC=0,13	>	Set the topic for the PUBLISH message
16.2	>dddrrrggghhhk	OK	Input topic to publish
17.1	AT+CMQTTPAYLOAD=0,60	>	Set the payload for the PUBLISH message
17.2	>012345678901234567890123456789 012345678901234567890123456789	OK	Input message
18	AT+CMQTTPUB=0,1,60		Publish a message
19.1	AT+CMQTTSUBTOPIC=0,9,1	>	Set one topic for the SUBSCRIBE message
19.2	>123456789	OK
20	AT+CMQTTSUB=0	OK +CMQTTSUB: 0,0	Subscribe a message
20.1	AT+CMQTTSUB=0,9,0	>
20.2	>simcommsg
21.1	AT+CMQTTUNSUB=0,9,0	>	Unsubscribe one topic from the server
21.2	>simcommsg	OK +CMQTTUNSUB: 0,0
23	AT+CMQTTDISC=0,120	OK +CMQTTDISC: 0,0	Disconnect from server
24	AT+CMQTTREL=0	OK	Release the client
25	AT+CMQTTSTOP	+CMQTTSTOP: 0 OK +CMQTTNONET	Stop MQTT Service