<p>I found this .c, is the current ID <code>gertrud</code>? Do I need to add a new ID? How can I modify this file? By executing which command I can connect the second RIOT instance to the same RSMB broker? By now I am using <code>make term</code> under <code>~/RIOT/examples/emcute_mqttsn$ </code>.</p>
<p>For the second question I mean how to use the shell command <code>sub</code>. As shown in "Fenster 4", after <code>sub heute</code>, i got only <code>Now subscribed to heute</code>, that's all? Can i get the subscribed" content of this topic? Or   from where can i subscribe the content with the same topic, the topic here is "heute"?</p>

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