https://devzone.nordicsemi.com/f/nordic-q-a/20728/about-connection-parameter-update-procedureI want to analyze the power consumption of connection parameter update procedure. How can i get a detailed description about the packet flow of it ? for example, the packet flow of connection establishment is showed in the pic belowed. Can i get a similaren-USTelligent Community 13Thu, 23 Mar 2017 14:30:00 GMThttps://devzone.nordicsemi.com/thread/80885?ContentTypeID=1Thu, 23 Mar 2017 14:30:00 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d82a6fa4-13d5-49be-b5b9-72ffa4495d82Sigurd<p>Hi,</p> <p>We have some Message Sequence Charts showing the Connection Update Procedure (<a href="https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.s132.api.v3.0.0%2Fgroup___b_l_e___g_a_p___c_e_n_t_r_a_l___c_p_u___m_s_c.html">Central Connection Parameter Update</a> and <a href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s132.api.v3.0.0/group___b_l_e___g_a_p___c_p_u___m_s_c.html?cp=2_3_0_1_2_2_1_3_7">Peripheral Connection Parameter Update</a>).</p> <p>For more details, you will have to take look at the <a href="https://www.bluetooth.com/specifications/adopted-specifications">Bluetooth specification</a>, e.g Version 4.2 [Vol 6, Part B], Chapter 5.1.1 Connection Update Procedure. You can also do a <a href="https://www.google.no/url?sa=t&amp;rct=j&amp;q=&amp;esrc=s&amp;source=web&amp;cd=1&amp;cad=rja&amp;uact=8&amp;ved=0ahUKEwjo6ubk6uzSAhWEkywKHdgHD4wQFggaMAA&amp;url=https%3A%2F%2Fwww.nordicsemi.com%2Feng%2FProducts%2FBluetooth-low-energy%2FnRF-Sniffer&amp;usg=AFQjCNGJ4D-WzVYV0ywTYv79N5clRLQC1g&amp;bvm=bv.150475504,d.bGg">sniffer trace</a>, so that you can see the on-air packets yourself.</p><div style="clear:both;"></div>