I'm trying to get a previously fully functioning MQTT connection back up and running after some hardware difficulties, but am failing to get it to connect to the MQTT broker. It seems to have a full network attach, but just won't connect to the broker itself. As well as this, the modem just occasionally goes fully silent to new AT commands, though still sends back updates like network status. Below are the echoed commands and responses.
Booted
OK
OK
OK
AT Command:AT+CFUN=1
OK
AT Command:AT%XAPNSTATUS=1,"infisim.iot"
OK
AT Command:AT+CEREG?
+CEREG: 1,5
OK
AT Command:AT+CGATT?
+CGATT: 1
OK
AT Command:AT+CEREG=0
OK
AT Command:AT+CEREG?
+CEREG: 0,5,"3009","00037F1E",7
OK
AT Command:AT#XMQTTCFG?
#XMQTTCFG: "sm_default_client_id",60,1
OK
AT Command:AT#XMQTTCON=1,"","","test.mosquitto.org",1883
OK
#XMQTTEVT: 1,-113
AT Command:AT+CEREG?
+CEREG: 0,5,"3009","00037F1E",7
OK
AT Command:AT#XMQTTCON=1,"","","broker.hivemq.com",1883, (Stops responding)
Help/suggestions would be much appreciated. If it helps, the hardware failure was an antenna line that came unplugged and has since been soldered back on with a shortened U.FL cable. The modem was powered for a short time before the fix, but didn't seem to heat up in any way.
