https://devzone.nordicsemi.com/f/nordic-q-a/44235/using-a-qt-vista-style-widget-makes-my-bleutooth-data-acquisition-faster-whyI&#39;m using a Nordic dev board (PCA10040, nRF52832) with modified &quot;Nordic_HRM&quot; firmware sending packets of 20bytes at 100Hz over Bluetooth Low Energy. I&#39;m using Nordic&#39;s heart_rate_collector example to retrieve the data on a Windows 10 computer usingen-USTelligent Community 13Fri, 08 Mar 2019 17:13:39 GMThttps://devzone.nordicsemi.com/thread/175121?ContentTypeID=1Fri, 08 Mar 2019 17:13:39 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a461ccb9-2602-47d8-afc2-3024e2e1083djpo38<p>Hello Edvin,</p> <p>On this other post (<a href="https://devzone.nordicsemi.com/f/nordic-q-a/32699/nrf52-fails-to-transmit-20bytes-data-at-100hz">https://devzone.nordicsemi.com/f/nordic-q-a/32699/nrf52-fails-to-transmit-20bytes-data-at-100hz</a>) it was concluded that the UART of the dongle was not fast enough. By using the sniffer, we saw that the same amount of data was transmitted from peripheral to central. Even if the central is not supposed to loose any data, if it does not work fast enough you can expect it to loose some.</p> <p>I will try with a s140 dongle. As I understood, this one has no UART, so probably there will be no problem.</p> <p>Kind regards,</p> <p>Jean</p> <p>PS: Yes I do use notifications.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/174979?ContentTypeID=1Fri, 08 Mar 2019 09:59:38 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3b1082ab-e140-4be9-9d07-4ae07c0ffc60Edvin<p>Hello,</p> <p>What I find strange is that if your device is a central, it is the peripheral that decides how often to send packets, as long as you use notifications (not indication), which you do, right? The central can&#39;t decide to receive just parts of the packet that the peripheral sends. It is either the entire packet or not any parts of the packet.&nbsp;</p> <p></p> <p>What I suspect is that when you do some Qt stuff (which I don&#39;t know anything about), then the parsing of these packets are split up by some Qt interrupt of some sort. Do you have any idea regarding the IRQ priorities of the Qt interrupts?</p> <p></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/174350?ContentTypeID=1Tue, 05 Mar 2019 16:10:43 GMT137ad170-7792-4731-bb38-c0d22fbe4515:055af0a2-bb3e-43db-857d-7b19a3d51a6fjpo38<p>Added this piece of code in&nbsp;UartBoost::readHandler:</p> <p><pre class="ui-code" data-mode="text">std::cout &lt;&lt; std::hex; for ( size_t pos = 0; pos != bytesTransferred; ++pos ) std::cout &lt;&lt; (unsigned) readBufferData[pos] &lt;&lt; &quot; &quot;; std::cout &lt;&lt; std::endl;</pre></p> <p>Then, when reported data rate is 65Hz, I see in the console:</p> <p><pre class="ui-code" data-mode="text">UartBoost::readHandler: 000065, pkt/s: 64.165840 UartBoost::readHandler: 002738, bytes/s: 2702.862793 c0 c1 2e 2 f 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 e9 97 c0 c0 c2 2e 2 e 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 50 cd c0 c0 c3 2e 2 d 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 94 80 c0 SerializationTransport::readHandler: 000065, pkt/s: 64.102562 pkts: 000065, pkt/s: 64.102562 c0 c4 2e 2 c 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 22 78 c0 c0 c5 2e 2 b 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 13 b9 c0 c0 c6 2e 2 a 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 b8 c9 c0 c0 c7 2e 2 9 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 7c 84 c0 c0 db dc 2e 2 10 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 97 66 c0 c0 c1 2e 2 f 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 fb bd c0 c0 c2 2e 2 e 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 42 e7 c0 c0 c3 2e 2 d 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 86 aa c0 c0 c4 2e 2 c 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 30 52 c0 c0 c5 2e 2 b 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 1 93 c0 c0 c6 2e 2 a 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 b8 c9 c0 c0 c7 2e 2 9 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 7c 84 c0 c0 db dc 2e 2 10 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 85 4c c0 c0 c1 2e 2 f 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 e9 97 c0 c0 c2 2e 2 e 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 50 cd c0 c0 c3 2e 2 d 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 94 80 c0 c0 c4 2e 2 c 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 22 78 c0 c0 c5 2e 2 b 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 13 b9 c0 c0 c6 2e 2 a 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 aa e3 c0 c0 c7 2e 2 9 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 6e ae c0 c0 db dc 2e 2 10 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 85 4c c0 c0 c1 2e 2 f 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 fb bd c0 c0 c2 2e 2 e 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 42 e7 c0 c0 c3 2e 2 d 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 86 aa c0 c0 c4 2e 2 c 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 30 52 c0 c0 c5 2e 2 b 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 1 93 c0 c0 c6 2e 2 a 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 b8 c9 c0 c0 c7 2e 2 9 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 7c 84 c0 c0 db dc 2e 2 10 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 97 66 c0 c0 c1 2e 2 f 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 fb bd c0 c0 c2 2e 2 e 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 50 cd c0 c0 c3 2e 2 d 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 94 80 c0 c0 c4 2e 2 c 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 22 78 c0 c0 c5 2e 2 b 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 13 b9 c0 c0 c6 2e 2 a 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 aa e3 c0 c0 c7 2e 2 9 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 6e ae c0 c0 db dc 2e 2 10 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 85 4c c0 c0 c1 2e 2 f 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 e9 97 c0 c0 c2 2e 2 e 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 50 cd c0 c0 c3 2e 2 d 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 94 80 c0 c0 c4 2e 2 c 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 30 52 c0 c0 c5 2e 2 b 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 1 93 c0 c0 c6 2e 2 a 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 b8 c9 c0 c0 c7 2e 2 9 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 7c 84 c0 c0 db dc 2e 2 10 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 97 66 c0 c0 c1 2e 2 f 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 fb bd c0 c0 c2 2e 2 e 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 42 e7 c0 c0 c3 2e 2 d 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 86 aa c0 c0 c4 2e 2 c 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 30 52 c0 c0 c5 2e 2 b 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 1 93 c0 c0 c6 2e 2 a 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 aa e3 c0 c0 c7 2e 2 9 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 6e ae c0 c0 db dc 2e 2 10 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 85 4c c0 c0 c1 2e 2 f 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 e9 97 c0 c0 c2 2e 2 e 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 50 cd c0 c0 c3 2e 2 d 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 94 80 c0 c0 c4 2e 2 c 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 22 78 c0 c0 c5 2e 2 b 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 13 b9 c0 c0 c6 2e 2 a 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 aa e3 c0 c0 c7 2e 2 9 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 6e ae c0 c0 db dc 2e 2 10 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 97 66 c0 c0 c1 2e 2 f 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 fb bd c0 UartBoost::readHandler: 000065, pkt/s: 64.102562 UartBoost::readHandler: 002738, bytes/s: 2700.197021 c0 c2 2e 2 e 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 42 e7 c0 c0 c3 2e 2 d 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 86 aa c0 c0 c4 2e 2 c 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 30 52 c0 SerializationTransport::readHandler: 000065, pkt/s: 64.165840 pkts: 000065, pkt/s: 64.165840 </pre></p> <p>And when it&#39;s 100Hz, I see:</p> <p><pre class="ui-code" data-mode="text">UartBoost::readHandler: 000170, pkt/s: 169.322723 UartBoost::readHandler: 004306, bytes/s: 4288.844727 c0 c4 2e 2 c 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 22 78 c0 c0 c5 2e 2 b 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 13 b9 c0 c0 c6 2e 2 a 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 aa e3 c0 c0 c7 2e 2 9 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 6e ae c0 c0 db dc 2e 2 10 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 97 66 c0 c0 c1 2e 2 f 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 fb bd c0 SerializationTransport::readHandler: 000103, pkt/s: 102.589645 pkts: 000103, pkt/s: 102.691925 c0 c2 2e 2 e 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 42 e7 c0 c0 c3 2e 2 d 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 86 aa c0 c0 c4 2e 2 c 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 30 52 c0 c0 c5 2e 2 b 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 1 93 c0 c0 c6 2e 2 a 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 b8 c9 c0 c0 c7 2e 2 9 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 7c 84 c0 c0 db dc 2e 2 10 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 97 66 c0 c0 c1 2e 2 f 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 fb bd c0 c0 c2 2e 2 e 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 42 e7 c0 c0 c3 2e 2 d 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 86 aa c0 c0 c4 2e 2 c 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 30 52 c0 c0 c5 2e 2 b 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 1 93 c0 c0 c6 2e 2 a 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 b8 c9 c0 c0 c7 2e 2 9 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 7c 84 c0 c0 db dc 2e 2 10 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 85 4c c0 c0 c1 2e 2 f 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 e9 97 c0 c0 c2 2e 2 e 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 50 cd c0 c0 c3 2e 2 d 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 94 80 c0 c0 c4 2e 2 c 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 22 78 c0 c0 c5 2e 2 b 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 13 b9 c0 c0 c6 2e 2 a 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 aa e3 c0 c0 c7 2e 2 9 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 6e ae c0 c0 db dc 2e 2 10 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 85 4c c0 c0 c1 2e 2 f 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 e9 97 c0 c0 c2 2e 2 e 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 50 cd c0 c0 c3 2e 2 d 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 94 80 c0 c0 c4 2e 2 c 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 22 78 c0 c0 c5 2e 2 b 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 13 b9 c0 c0 c6 2e 2 a 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 aa e3 c0 c0 c7 2e 2 9 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 6e ae c0 c0 db dc 2e 2 10 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 97 66 c0 c0 c1 2e 2 f 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 fb bd c0 c0 c2 2e 2 e 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 42 e7 c0 c0 c3 2e 2 d 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 86 aa c0 c0 c4 2e 2 c 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 30 52 c0 c0 c5 2e 2 b 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 1 93 c0 c0 c6 2e 2 a 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 b8 c9 c0 c0 c7 2e 2 9 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 7c 84 c0 c0 db dc 2e 2 10 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 97 66 c0 c0 c1 2e 2 f 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 fb bd c0 c0 c2 2e 2 e 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 42 e7 c0 c0 c3 2e 2 d 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 86 aa c0 c0 c4 2e 2 c 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 30 52 c0 c0 c5 2e 2 b 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 1 93 c0 c0 c6 2e 2 a 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 b8 c9 c0 c0 c7 2e 2 9 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 7c 84 c0 c0 db dc 2e 2 10 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 85 4c c0 c0 c1 2e 2 f 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 e9 97 c0 c0 c2 2e 2 e 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 50 cd c0 c0 c3 2e 2 d 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 94 80 c0 c0 c4 2e 2 c 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 22 78 c0 c0 c5 2e 2 b 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 13 b9 c0 c0 c6 2e 2 a 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 aa e3 c0 c0 c7 2e 2 9 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 6e ae c0 c0 db dc 2e 2 10 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 85 4c c0 c0 c1 2e 2 f 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 e9 97 c0 c0 c2 2e 2 e 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 50 cd c0 c0 c3 2e 2 d 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 94 80 c0 c0 c4 2e 2 c 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 22 78 c0 c0 c5 2e 2 b 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 13 b9 c0 c0 c6 2e 2 a 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 aa e3 c0 c0 c7 2e 2 9 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 6e ae c0 c0 db dc 2e 2 10 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 97 66 c0 c0 c1 2e 2 f 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 fb bd c0 c0 c2 2e 2 e 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 42 e7 c0 c0 c3 2e 2 d 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 86 aa c0 c0 c4 2e 2 c 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 30 52 c0 c0 c5 2e 2 b 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 1 93 c0 c0 c6 2e 2 a 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 b8 c9 c0 c0 c7 2e 2 9 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 7c 84 c0 c0 db dc 2e 2 10 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 97 66 c0 c0 c1 2e 2 f 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 fb bd c0 c0 c2 2e 2 e 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 42 e7 c0 c0 c3 2e 2 d 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 86 aa c0 c0 c4 2e 2 c 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 30 52 c0 c0 c5 2e 2 b 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 1 93 c0 c0 c6 2e 2 a 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 b8 c9 c0 c0 c7 2e 2 9 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 7c 84 c0 c0 db dc 2e 2 10 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 85 4c c0 c0 c1 2e 2 f 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 e9 97 c0 c0 c2 2e 2 e 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 50 cd c0 c0 c3 2e 2 d 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 94 80 c0 c0 c4 2e 2 c 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 22 78 c0 c0 c5 2e 2 b 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 13 b9 c0 c0 c6 2e 2 a 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 aa e3 c0 c0 c7 2e 2 9 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 6e ae c0 c0 db dc 2e 2 10 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 85 4c c0 c0 c1 2e 2 f 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 e9 97 c0 c0 c2 2e 2 e 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 50 cd c0 c0 c3 2e 2 d 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 94 80 c0 c0 c4 2e 2 c 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 22 78 c0 c0 c5 2e 2 b 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 13 b9 c0 c0 c6 2e 2 a 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 aa e3 c0 c0 c7 2e 2 9 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 6e ae c0 c0 db dc 2e 2 10 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 97 66 c0 c0 c1 2e 2 f 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 fb bd c0 c0 c2 2e 2 e 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 42 e7 c0 UartBoost::readHandler: 000192, pkt/s: 191.235077 UartBoost::readHandler: 004331, bytes/s: 4313.745117 c0 c3 2e 2 d 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 86 aa c0 c0 c4 2e 2 c 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 30 52 c0 c0 c5 2e 2 b 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 1 93 c0 c0 c6 2e 2 a 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 b8 c9 c0 c0 c7 2e 2 9 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 7c 84 c0 c0 db dc 2e 2 10 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 97 66 c0 SerializationTransport::readHandler: 000103, pkt/s: 101.778656 pkts: 000103, pkt/s: 101.778656 </pre></p> <p>as you can see, the packets are splitted. At 65Hz, every packet is a full notification. At 100Hz, packets are splitted, meaning that many reads are necessary to get the full notification. This explains why at 65Hz we receive a few less bytes but a lot of less packets.</p> <p>if I use notpad tp clean the 100Hz packets to group them c0...c0, I get:</p> <p><pre class="ui-code" data-mode="text">UartBoost::readHandler: 000170, pkt/s: 169.322723 UartBoost::readHandler: 004306, bytes/s: 4288.844727 c0 c4 2e 2 c 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 22 78 c0 c0 c5 2e 2 b 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 13 b9 c0 c0 c6 2e 2 a 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 aa e3 c0 c0 c7 2e 2 9 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 75 b4 2 0 c8 61 0 20 f3 6b 2 0 6e ae c0 c0 db dc 2e 2 10 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 97 66 c0 c0 c1 2e 2 f 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 fb bd c0 SerializationTransport::readHandler: 000103, pkt/s: 102.589645 pkts: 000103, pkt/s: 102.691925 c0 c2 2e 2 e 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 42 e7 c0 c0 c3 2e 2 d 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 86 aa c0 c0 c4 2e 2 c 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 30 52 c0 c0 c5 2e 2 b 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 1 93 c0 c0 c6 2e 2 a 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 b8 c9 c0 c0 c7 2e 2 9 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 7c 84 c0 c0 db dc 2e 2 10 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 97 66 c0 c0 c1 2e 2 f 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 fb bd c0 c0 c2 2e 2 e 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 42 e7 c0 c0 c3 2e 2 d 2 39 0 0 0 0 0 0 0 10 0 1 14 0 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0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 42 e7 c0 UartBoost::readHandler: 000192, pkt/s: 191.235077 UartBoost::readHandler: 004331, bytes/s: 4313.745117 c0 c3 2e 2 d 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 86 aa c0 c0 c4 2e 2 c 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 30 52 c0 c0 c5 2e 2 b 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 1 93 c0 c0 c6 2e 2 a 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 b8 c9 c0 c0 c7 2e 2 9 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 7c 84 c0 c0 db dc 2e 2 10 2 39 0 0 0 0 0 0 0 10 0 1 14 0 0 0 0 0 8c 56 0 20 6f b4 2 0 c8 61 0 20 f3 6b 2 0 97 66 c0 SerializationTransport::readHandler: 000103, pkt/s: 101.778656 pkts: 000103, pkt/s: 101.778656 </pre></p> <p>very similar to the situation where we have 65Hz, but with ~35 more lines. This is expected.</p> <p>So looks like Windows or the driver at some points prefers to send less data but in a cleaner way (not splitting the packets)....again, I don&#39;t understand why.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/174214?ContentTypeID=1Tue, 05 Mar 2019 10:28:11 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5f629563-7a68-4ee7-8899-7bf9494c0d3bjpo38<p>Hello Edvin,</p> <p>I added more data rate monitoring in the pc-ble-driver code itself and recompiled it. One in reder thread (`SerializationTransport::readHandler`), one in the code getting data from the USB connection (`UartBoost::readHandler`) for which I monitor the number of packets and the number of bytes received. Here is what I observe:</p> <p>When data is received at 100Hz, I see:</p> <p>UartBoost::readHandler: 000213, pkt/s: 212.362900<br /> UartBoost::readHandler: 004315, bytes/s: 4302.093750<br /> SerializationTransport::readHandler: 000103, pkt/s: 102.385681<br /> pkts: 000102, pkt/s: 102.000000</p> <p>When data is received at 65Hz, I see:</p> <p>UartBoost::readHandler: 000061, pkt/s: 60.157787<br /> UartBoost::readHandler: 002570, bytes/s: 2534.516602<br /> SerializationTransport::readHandler: 000061, pkt/s: 60.157787<br /> pkts: 000061, pkt/s: 60.157787</p> <p>It&#39;s surprising that `UartBoost::readHandler` data rate (bytes/s) is reduced from 4302 to 2534 (same ratio reduced by ~40%, like final sampling rate), while the number of packets by second (pkt/s) is much more reduced by 71% (from 212 to 60). The BLE dongle sends 35% of data less but using 71% of packets less...I d&#39;ont know what to conclude.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/173758?ContentTypeID=1Fri, 01 Mar 2019 16:02:38 GMT137ad170-7792-4731-bb38-c0d22fbe4515:41dcff29-cd84-4d3e-a457-c143c579b52eawneil<p>How to properly post source code:</p> <p><img alt=" " src="https://devzone.nordicsemi.com/resized-image/__size/320x240/__key/communityserver-discussions-components-files/4/5826._5F00_Insert-Code-_2D00_-Nordic.png" /></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/173746?ContentTypeID=1Fri, 01 Mar 2019 14:56:21 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a80fe13e-c3c2-4c9b-8043-7b6fc1156125jpo38<p>Hello Edvin,</p> <p>My device is a central. The peripheral is a &quot;Nordic_HRM&quot; example customized to send data at 100Hz.</p> <p>The full code is available at&nbsp;<a href="https://pastebin.com/mNzjg5LZ">https://pastebin.com/mNzjg5LZ</a>. It&#39;s nordic sample program with just a QApplication added. All information you are looking for is available here.</p> <p>Kind regards,</p> <p>Jean Porcherot</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/173743?ContentTypeID=1Fri, 01 Mar 2019 14:45:52 GMT137ad170-7792-4731-bb38-c0d22fbe4515:346da3d3-cfae-4d37-8eb9-3760db1c3aaaEdvin<p>Hello,</p> <p>What I really wanted to know is whether the m_hvx_count was &quot;volatile&quot; or not. Whether it could be that it was not actually incremented, even though you thought so, but I guess since it is incremented that probably isn&#39;t the answer.&nbsp;</p> <p>There are a lot of things I don&#39;t know about your application.</p> <p>Is your device (Qt application) a central or peripheral? Is it sending or receiving notifications?</p> <p>What is your connection interval?</p> <p>Can you show me the snippet where you increment the m_hvx_count?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/173704?ContentTypeID=1Fri, 01 Mar 2019 13:02:56 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c5c22839-6ac7-4429-8186-7fef9247541cjpo38<p>Hello Edvin,</p> <p><span>m_hvx_count is just a counter of notifications. It&#39;s a uint32.</span></p> <p><span>Long time ago when I first reported this issue with 100Hz data to nordic (<a href="https://devzone.nordicsemi.com/f/nordic-q-a/32699/nrf52-fails-to-transmit-20bytes-data-at-100hz">https://devzone.nordicsemi.com/f/nordic-q-a/32699/nrf52-fails-to-transmit-20bytes-data-at-100hz</a>) I used the sniffer as recommanded. It did not help at all...the sniffer logs are still available here as uploaded files.</span></p> <p><span></span><span>Jean</span></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/173646?ContentTypeID=1Fri, 01 Mar 2019 09:51:56 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5df3c7f7-a3b7-4579-88c2-dbbf65523b2cEdvin<p>Hello,</p> <p>Thank you for the stackoverflow link.&nbsp;</p> <p>I don&#39;t have any experience with Qt or GUI programming, but you were correct. I wouldn&#39;t have believed you without the short video clips :P</p> <p>What would be interesting is to see a sniffer trace from your connection while you do the mouse hovering thing.&nbsp;</p> <p>I am not sure whether you are familliar with the nRF Sniffer, but it is a FW that does require another DK/dongle, but it can capture all the packets on air. Maybe it can give some hint on why the packet rate is going down.</p> <p></p> <p>Check it out <a href="https://www.nordicsemi.com/Software-and-Tools/Development-Tools/nRF-Sniffer">here</a>. If possible, please save the trace as a .pcapng, and post it here. It would be interesting to see.</p> <p></p> <p>Now, I am no C++ expert, but what&nbsp;type of variable is your m_hvx_count?</p> <p>Could it be some IRQ priority issue that the on_hvx() is not being prioritized when you hover the mouse over the button?</p> <p></p> <p>BR,</p> <p>Edvin</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/173476?ContentTypeID=1Thu, 28 Feb 2019 12:45:47 GMT137ad170-7792-4731-bb38-c0d22fbe4515:1e9ea8a2-0363-4057-96fc-786052a10214jpo38<p>For a better formatting, you can see:&nbsp;<a href="https://stackoverflow.com/questions/54922799/using-a-qt-vista-style-widget-makes-my-usb-ble-data-acquisition-faster-why">stackoverflow.com/.../using-a-qt-vista-style-widget-makes-my-usb-ble-data-acquisition-faster-why</a></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/173424?ContentTypeID=1Thu, 28 Feb 2019 10:13:39 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0558892f-1463-4569-b777-bb2232f9958ajpo38<p>Sorry for the bad formatting....how can I edit this post to make it look better?</p><div style="clear:both;"></div>