...
| Note |
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Secure MQTT is not supported |
1. Example: Unencrypted, unauthenticated
| Code Block | ||
|---|---|---|
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# Translates a domain name into an IP address using an existing DNS. > AT+UDNSRN=0,"broker.emqx.io" < +UDNSRN: "3.82.39.163", "44.195.202.69" < OK # Enable URCs > AT+CEREG=12 < OK # Read network registration status > AT+CEREG? < +CEREG: 2,2 < OK # Read network registration status. Wait of +CEREG: 2,5... > AT+CEREG? < +CEREG: 2,5,"AB80","819965",9 < OK # Check the module connected to the network > AT+CGATT? < +CGATT: 1 < OK # Check to see if the PDP context has been activated. > AT+CGACT? < +CGACT: 1,1 < OK # Read IP address from module > AT+CGDCONT? < +CGDCONT: 1,"IP","vgesace.nb.iot","10.254.46.241",0,0,0,0,0,0 < OK # Set MQTT unique client ID. In the example IMEI from device > AT+UMQTT=0,"350857128129037" < +UMQTT: 0,1 < OK # Set MQTT local TCP port number > AT+UMQTT=1,1883 < +UMQTT: 1,1 < OK # Set remote MQTT server's name > AT+UMQTT=2,"broker.emqx.io" < +UMQTT: 2,1 < OK # Set remote MQTT server's IP address > AT+UMQTT=3,"44.195.202.69",1883 < +UMQTT: 3,1 < OK # Connect to the broker > AT+UMQTTC=1 < +UMQTTC: 1,1 < OK < +UUMQTTC: 1,0 """ Repeat the command "AT+UMQTTC=1" if the URC "+UUMQTTC: 1,0" does not arrive. """ # Subscribe to MQTT topic filter > AT+UMQTTC=4,0,"/exelonix/test" < +UMQTTC: 4,1 < OK < +UUMQTTC: 4,1,0,"/exelonix/test" # Publish MQTT message to topic name > AT+UMQTTC=2,0,0,"/exelonix/test","MQTT message" < +UMQTTC: 2,1 < OK # Wait of asynchronous notification (URC) of the reception of an MQTT message < +UUMQTTCM: 6,1 # Read MQTT messages received > AT+UMQTTC=6 < +UMQTTC: 6,1 < OK < +UUMQTTCM: 6,1 < Topic:/exelonix/test < Msg:MQTT message # Disconnect from the broker > AT+UMQTTC=0 < +UMQTTC: 0,1 < OK |
2. Example: Unencrypted, authenticated
| Code Block |
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# Translates a domain name into an IP address using an existing DNS.
> AT+UDNSRN=0,"test.mosquitto.org"
< +UDNSRN: "91.121.93.94"
< OK
# Enable URCs
> AT+CEREG=2
< OK
# Read network registration status
> AT+CEREG?
< +CEREG: 2,2
< OK
# Read network registration status. Wait of +CEREG: 2,5...
> AT+CEREG?
< +CEREG: 2,5,"A9F0","819901",7
< OK
# Check the module connected to the network
> AT+CGATT?
< +CGATT: 1
< OK
# Check to see if the PDP context has been activated.
> AT+CGACT?
< +CGACT: 1,1
< OK
# Read IP address from module
> AT+CGDCONT?
< +CGDCONT: 1,"IP","vgesace.nb.iot","10.254.46.27",0,0,0,0,0,0
< OK
# Set MQTT unique client ID. In the example IMEI from device
AT+UMQTT=0,"350857128129037"
+UMQTT: 0,1
OK
# Set MQTT local TCP port number
AT+UMQTT=1,1884
+UMQTT: 1,1
OK
# Set remote MQTT server's name
AT+UMQTT=2,"test.mosquitto.org"
+UMQTT: 2,1
OK
# Set remote MQTT server's IP address
AT+UMQTT=3,"91.121.93.94",1884
+UMQTT: 3,1
OK
# Set User name and password
AT+UMQTT=4,"rw","readwrite"
+UMQTT: 4,1
OK
# Connect to the broker
AT+UMQTTC=1
+UMQTTC: 1,1
OK
+UUMQTTC: 1,0
""" Repeat the command "AT+UMQTTC=1" if the URC "+UUMQTTC: 1,0" does not arrive. """
# Subscribe to MQTT topic filter
AT+UMQTTC=4,0,"/exelonix/test"
+UMQTTC: 4,1
OK
+UUMQTTC: 4,1,0,"/exelonix/test"
# Publish MQTT message to topic name
AT+UMQTTC=2,0,0,"/exelonix/test","MQTT message"
+UMQTTC: 2,1
OK
# Wait of asynchronous notification (URC) of the reception of an MQTT message
+UUMQTTCM: 6,1
# Read MQTT messages received
AT+UMQTTC=6
+UMQTTC: 6,1
OK
+UUMQTTCM: 6,1
Topic:/exelonix/test
Msg:MQTT message
# Disconnect from the broker
> AT+UMQTTC=0
< +UMQTTC: 0,1
< OK |