RAK5010 MQTT Connection

Cellular Boards RAK5010
1

Issue: I want to connect to public broker MQTT Dashboard w/o user&password.

Setup:
at+set_config=cellular:(AT+QMTOPEN=0,“broker.hivemq.com”,1883)
AT+QMTOPEN=0,“broker.hivemq.com”,1883
OK

+QMTOPEN: 0,0
at+set_config=cellular:(AT+QMTCONN?)

+QMTSTAT: 0,1
AT+QMTCONN?
OKat+set_config=cellular:(AT+QMTCONN=0,“RAK”) no user and password required

AT+QMTCONN=0,“RAK”
ERROR
ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿat+set_config=cellular:(AT+QMTCONN=0,“RAK”,“123”,“456”) test with user & password
AT+QMTCONN=0,“RAK”,“123”,“456”
ERROR
ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ[00][00][00][00][00][00][00][00][00][00][00][00][00][00][00][00][00][00][00][00][00][00][00]

Details:
both connections variants work with a webclient

What is wrong here? Wat does [00][00] mean?

2

Hi Dr @ckuehnel ,

Based on this reply, your connection was closed.

image
image851×165 4.94 KB

Maybe you can try to open again the connection and immediately connect to it.

Btw, on doing MQTT connections, I ensure HTTP connection first before doing mqtt pub/sub.

3

I tried the hologram SIM got with the RAK5010.
Activation at Hologram works.
Afterward, I tested the AT examples. Look for the result in my screenshot.

hologram_test
hologram_test829×736 15.5 KB

What about the commands with ERROR:RUI_AT_PARAMETER_INVALID 2?
What are the [00][00] characters?