beremiz

MQTT: Fix warning when subscribing first topic from python.

16 months ago, Edouard Tisserant
089ecd14deb3
MQTT: Fix warning when subscribing first topic from python.

Ensure that message callback is already set before subscribing a topic from python.
Widget syntax
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.. highlight:: text
HMI elements are SVG elements whose labels start with ``HMI:``::
HMI:WidgetType[|freq][[:param]...][[@a=path[,min][,max]]...][#expression]
Widget Type
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Update Frequency
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Parameters
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Variable bindings
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Enable expression
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