<p><b>@smlng</b> requested changes on this pull request.</p>

<hr>

<p>In <a href="https://github.com/RIOT-OS/RIOT/pull/11736#discussion_r297516179">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>is this LoRa specific? Then it should be named <code>NETOPT_LORA_SYNCWORD</code> or <code>NETOPT_LORAWAN_SYNCWORD</code> or even <code>NETOPT_LORAWAN_PHY_SYNCWORD</code>?</p>

<hr>

<p>In <a href="https://github.com/RIOT-OS/RIOT/pull/11736#discussion_r297516283">sys/include/net/netopt.h</a>:</p>
<pre style='color:#555'>> +    /**
+     * @brief   (uint8_t*) phy layer syncword
+     */
+    NETOPT_SYNCWORD,
+
+    /**
+     * @brief  (uint32_t) Get a random value from the device
+     *
+     * Nothing happens when set
+     */
+    NETOPT_RANDOM,
+
+    /**
+     * @brief (uint8_t) Get or set the number of PHY symbols before assuming there's no data
+     */
+    NETOPT_RX_SYMBOL_TIMEOUT,
</pre>
<p>same as above, may need prefix <code>LORAWAN</code>?</p>

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