Troubleshooting

This section contains troubleshooting articles

Using Kowl for inspecting messages

How-to use Kowl to inspect Kafka messages

No messages can be seen in MQTT-Explorer

When you can’t see messages coming through from the machine, do the following.

Weird MQTT messages

Sometimes it can happen that MQTT messages appear out of nowhere and it is unclear where it originates from.

MQTT in & out fail to connect, so don’t forget ia_nodered!

While building the Node-RED flow the MQTT elements failed to connect under deployment.

No MQTT messages although ifm IO-Link-Master is connected

This provides a step-by-step troubleshooting guide for ifm IO-link masters connected via sensorconnect.