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mqtt_subscribe_publish

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When the device is powered on, the log is as follows:

image-20210312161920223

configure [mqtt.fx](Download (jensd.de)) to connect mqtt broker.

mqtt-fx-config

configure mqtt.fx to subscribe specific topics.

image-20210312161431163

Publish topic to control LED on/off.

image-20210312161454851

image-20210312161602378

Publish topic to control LED off.

image-20210312161713024

Arduino log is as follows.

image-20210312161740431