<p>Thanks for the quick review :-)</p>
<p>It is very surprising to me that Doxygen may link to a unrelated group, even though a same named object is present in the same group. I hope that a feature to manually resolve such ambiguity will be added in future versions. I would prefer the references <code>LED0_ON</code>, <code>LED0_OFF</code>, and  <code>LED0_TOGGLE</code> (and similar) in the MSB-IoT doc to linked to the macros in the MSB-IoT group rather than the empty fall-back ones provided in <code>led.h</code>.</p>

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