Error "Cellular IoT Fundamentals" COURSE / Lesson 4 / Exercise 1 Solution

[Angel]

Hi,

When trying to publish the press button, I get a -128 error:

I  can't see any data @:

I am trying it with the Solution to exercise and getting the "connected" green led. What can I try to solve it?

The course is awesome by the way.

Best Regards,

Atreyu

[Angel]

OK. It's working today sometimes. Maybe the test.mosquitto is too overcrowded...

[Ali Aljaani]

Hi atreyu, 

You are right something test.mosquitto.org get's overcrowded. There are other public MQTT brokers avaiable ( Ex:  broker.hivemq.com  at TCP Port: 1883 ) .  
You can simply change the MQTT broker in Lesson 4- Exercise 1, by chaning the Kconfig symbol CONFIG_MQTT_BROKER_HOSTNAME in prj.conf, build the application, and flash it to the board.