I need a MQTT broker to test the PowerCable MQTT. Does NETIO provide a broker? | NETIO products: Smart power sockets controlled over LAN and WiFi
I need a MQTT broker to test the PowerCable MQTT. Does NETIO provide a broker?

No, all our examples, such as the AN40, use the MQTT broker by HiveMQ. Its unsecured version is accessible free of charge. See AN40.

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For device testing use name/password demo/demo