Hi Martijn, I need a bit more information to help out: - is your device actually a '438'? - did you enter the Dyson cloud account or local password? Or both? - when starting the plugin (just hit 'update' on the hardware page), what is the logging saying when attempting to connect? It will also spit ...

Dear JanJaap, i'm using your plugin and did the add 438 to update to the latest version of the plugin. It seems like to work on my Dyson Pure Cool. It connects but doesn't get the values. Using latest version of Domoticz. Here the log of domoticz: 2020-05-02 10:54:38.395 (Dyson pure cool) MqttClient ...