shOnDataTopicEPK19__FlashStringHelperPKcb" title="Permalink to this definition">¶</a><br /></dt>
<dd><p>Publishes the given string on the data topic.</p>
<dl class="field-list simple">
<dt class="field-odd">Parameters</dt>
<dd class="field-odd"><ul class="simple">
<li><p><strong>topic</strong> – The topic to publish on (progmem string). </p></li>
<li><p><strong>payload</strong> – The message’s payload. </p></li>
<li><p><strong>retained</strong> – Specifies whether the message should be retained. </