<p><b>@jia200x</b> commented on this pull request.</p>

<hr>

<p>In <a href="https://github.com/RIOT-OS/RIOT/pull/11736#discussion_r297541421">sys/include/net/netopt.h</a>:</p>
<pre style='color:#555'>> @@ -645,6 +645,23 @@ typedef enum {
      */
     NETOPT_LORAWAN_MIN_RX_SYMBOL,
 
+    /**
+     * @brief   (uint8_t*) phy layer syncword
+     */
+    NETOPT_SYNCWORD,
</pre>
<p>yup. In most 15.4 radios it's possible to change the SFD (Syncword) to a different value</p>

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