Hello,
I’m having some trouble connecting to an MQTT server using AT commands. My hardware is a RAK7243 with an EG95 module.
Everything works fine until the AT+QMTOPEN
command. This command always outputs “0,3,” which indicates “Failed to activate PDP” (see page 14 of the Quectel EG9x MQTT Application Note V1.1). Before using AT+QMTOPEN
, I tried activating PDP with AT+CGACT=1,1
without success.
Here’s some potentially relevant information:
- The
AT+QMTOPEN
command I’m using is:AT+QMTOPEN=0,"test.mosquitto.org",1883
(always returns 0,3). AT+CGDCONT
returns five contexts with all zeros for the IP address (I expected an IP address assigned by the network provider).- After using
AT+CGDCONT
, the commandCGPADDR
returns an invalid IP address that appears very large. AT+COPS
returns:+COPS: 0,0,"T-Mobile",7
(which I believe is okay).AT+CREG
returns:0,1
(also okay).AT+QPING=1,"test.mosquitto.org"
always returns “561” (unclear if successful ping).- Calling functionality works perfectly.
Do you have any ideas what might be causing this issue? Could it be possible that my SIM card lacks a data plan or service?
Thank you!