simcom-at-mqtt-dat

• SIMCOM-AT-DAT

• Chip-cn-dat/SIMCOM-dat/SIMCOM-AT-dat/simcom-at-mqtt-dat/simcom-at-mqtt-dat.exe - preconfig == Chip-cn-dat/SIMCOM-dat/SIMCOM-AT-dat/simcom-at-mqtt-dat/sscom51.ini

• MQTT-dat

log start

AT+CMQTTSTART
OK

+CMQTTSTART: 1

set channel

AT+CMQTTACCQ=0,"a12mmmm",0

• note: Changed from AT+CMQTTACCQ=0,"a12mmmm",0 to AT+CMQTTACCQ=0,"a12mmmm". The third parameter might not be supported by your modem

connect to server

AT+CMQTTCONNECT=0,"tcp://206.237.31.27:1883",20,1,"electrodragon","electrodragon"

send message

AT+CMQTTTOPIC=0,4
>
OK
AT+CMQTTPAYLOAD=0,6
>
OK
AT+CMQTTPUB=0,0,60
OK

+CMQTTPUB: 0,0

receive message

+CMQTTRXSTART: 0,4,6
+CMQTTRXTOPIC: 0,4
test
+CMQTTRXPAYLOAD: 0,6
999999
+CMQTTRXEND: 0

will info

AT+CMQTTWILLTOPIC=0,4
>test
OK
AT+CMQTTWILLMSG=0,6,1
>123456
OK

ref

• SIMCOM-dat