<?xml version="1.0" encoding="UTF-8" ?>
<?xml-stylesheet type="text/xsl" href="https://devzone.nordicsemi.com/cfs-file/__key/system/syndication/rss.xsl" media="screen"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/" xmlns:wfw="http://wellformedweb.org/CommentAPI/" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Link layer Packet</title><link>https://devzone.nordicsemi.com/f/nordic-q-a/26661/link-layer-packet</link><description>When I use sniffers and wireshark for debugging (ble_app_uart), I found a strange place. 
 The following are the empty data PDUs seen from wireshark: 
 50ms: 
 Master-&amp;gt;Slave 
 Slave-&amp;gt; Master 
 Master-&amp;gt; slave 
 Slave-&amp;gt; Master 
 ... 
 .. 
 7.5ms</description><dc:language>en-US</dc:language><generator>Telligent Community 13</generator><lastBuildDate>Thu, 09 Nov 2017 13:25:10 GMT</lastBuildDate><atom:link rel="self" type="application/rss+xml" href="https://devzone.nordicsemi.com/f/nordic-q-a/26661/link-layer-packet" /><item><title>RE: Link layer Packet</title><link>https://devzone.nordicsemi.com/thread/104884?ContentTypeID=1</link><pubDate>Thu, 09 Nov 2017 13:25:10 GMT</pubDate><guid isPermaLink="false">137ad170-7792-4731-bb38-c0d22fbe4515:4d8eeba7-f9dd-430b-8c44-fc955e9dfcc6</guid><dc:creator>Petter Myhre</dc:creator><description>&lt;p&gt;Ok. Maybe you can accept this one then?&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: Link layer Packet</title><link>https://devzone.nordicsemi.com/thread/104883?ContentTypeID=1</link><pubDate>Thu, 09 Nov 2017 12:06:59 GMT</pubDate><guid isPermaLink="false">137ad170-7792-4731-bb38-c0d22fbe4515:1bf36dec-6646-4436-86b1-cc963afe6252</guid><dc:creator>Stayhungry</dc:creator><description>&lt;p&gt;Thanks Petter.&lt;/p&gt;
&lt;p&gt;This is another question, I created another question, not here&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: Link layer Packet</title><link>https://devzone.nordicsemi.com/thread/104885?ContentTypeID=1</link><pubDate>Thu, 09 Nov 2017 12:03:49 GMT</pubDate><guid isPermaLink="false">137ad170-7792-4731-bb38-c0d22fbe4515:551a01d5-57a5-49f4-800c-6ed5b5ddcf38</guid><dc:creator>Petter Myhre</dc:creator><description>&lt;p&gt;Depends one what peer you are connecting to, chipset you are using, SoftDevice you are using, SDK you are using, example you are using. Please provide some more information. An event length of 6 doesn&amp;#39;t mean 6 packets, it means that 7.5 ms of the connection interval is reserved for this particular link.&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: Link layer Packet</title><link>https://devzone.nordicsemi.com/thread/104882?ContentTypeID=1</link><pubDate>Tue, 07 Nov 2017 16:29:04 GMT</pubDate><guid isPermaLink="false">137ad170-7792-4731-bb38-c0d22fbe4515:c8b2e1a9-c153-4bbb-a581-0c2880562a26</guid><dc:creator>Stayhungry</dc:creator><description>&lt;p&gt;Thank you very much for your reply.
I changed a computer to run the same version of sniffer and wireshark can correctly capture the package, whether it is 7.5ms or 50ms, I suspect that my previous computer configuration a bit low.&lt;/p&gt;
&lt;p&gt;By the way, if there is only one connection, and the event length is set to 6 (1.25 * 6 = 7.5ms) in sdk_config.h, if I want to be able to send 6 LL PDUs in a connection event, some other configuration is needed ? Or the hardware automatically?&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: Link layer Packet</title><link>https://devzone.nordicsemi.com/thread/104881?ContentTypeID=1</link><pubDate>Tue, 07 Nov 2017 10:15:45 GMT</pubDate><guid isPermaLink="false">137ad170-7792-4731-bb38-c0d22fbe4515:59661280-62a1-4a7f-b557-45ebc1d91421</guid><dc:creator>Petter Myhre</dc:creator><description>&lt;p&gt;Not normal, could you edit your question and upload the sniffer trace file?&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item></channel></rss>