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<title>Copter Hack 2017 | Clover</title><meta name="description" content="Clover Drone Kit">
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aria-label="Safety tips"><!--[--><!--]--> Safety tips <!--[--><!--]--></a><!----></li><li><p tabindex="0" class="sidebar-item sidebar-heading collapsible">Assembly <span class="right arrow"></span></p><!--[--><ul style="display:none;" class="sidebar-item-children"><!--[--><li><a href="/clover-vuepress/en/assembly.html" class="sidebar-item" aria-label="Clover drone assembly"><!--[--><!--]--> Clover drone assembly <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/assemble_4_2.html" class="sidebar-item" aria-label="Clover 4.2 assembly"><!--[--><!--]--> Clover 4.2 assembly <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/assemble_4_2_ws.html" class="sidebar-item" aria-label="Clover 4 assembly"><!--[--><!--]--> Clover 4 assembly <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/assemble_4.html" class="sidebar-item" aria-label="Clover 4 assembly"><!--[--><!--]--> Clover 4 assembly <!--[--><!--]--></a><!----></li><li><a 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class="sidebar-item" aria-label="RC setup"><!--[--><!--]--> RC setup <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/rc_flysky_a8s.html" class="sidebar-item" aria-label="Using Flysky FS-A8S"><!--[--><!--]--> Using Flysky FS-A8S <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/modes.html" class="sidebar-item" aria-label="Flight modes"><!--[--><!--]--> Flight modes <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/power.html" class="sidebar-item" aria-label="Power setup"><!--[--><!--]--> Power setup <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/failsafe.html" class="sidebar-item" aria-label="Failsafe configuration"><!--[--><!--]--> Failsafe configuration <!--[--><!--]--></a><!----></li><!--]--></ul><!--]--></li><li><p tabindex="0" class="sidebar-item sidebar-heading collapsible">Manual flight <span class="right arrow"></span></p><!--[--><ul style="display:none;" class="sidebar-item-children"><!--[--><li><a href="/clover-vuepress/en/flight.html" class="sidebar-item" aria-label="Flight"><!--[--><!--]--> Flight <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/flight_exercises.html" class="sidebar-item" aria-label="Drone control exercises"><!--[--><!--]--> Drone control exercises <!--[--><!--]--></a><!----></li><!--]--></ul><!--]--></li><li><p tabindex="0" class="sidebar-item sidebar-heading collapsible">Working with Raspberry Pi <span class="right arrow"></span></p><!--[--><ul style="display:none;" class="sidebar-item-children"><!--[--><li><a href="/clover-vuepress/en/raspberry.html" class="sidebar-item" aria-label="Raspberry Pi"><!--[--><!--]--> Raspberry Pi <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/image.html" class="sidebar-item" aria-label="Raspberry Pi image"><!--[--><!--]--> Raspberry Pi image <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/wifi.html" class="sidebar-item" aria-label="Connecting to Clover via 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class="sidebar-item" aria-label="Using rviz and rqt"><!--[--><!--]--> Using rviz and rqt <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/autolaunch.html" class="sidebar-item" aria-label="Software autorun"><!--[--><!--]--> Software autorun <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/javascript.html" class="sidebar-item" aria-label="Work with ROS from browser"><!--[--><!--]--> Work with ROS from browser <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/blocks.html" class="sidebar-item" aria-label="Blocks programming for Clover"><!--[--><!--]--> Blocks programming for Clover <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/simulation.html" class="sidebar-item" aria-label="Simulation overview"><!--[--><!--]--> Simulation overview <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/simulation_native.html" class="sidebar-item" aria-label="Native setup"><!--[--><!--]--> Native setup <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/simulation_vm.html" class="sidebar-item" aria-label="Simulation VM setup"><!--[--><!--]--> Simulation VM setup <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/simulation_usage.html" class="sidebar-item" aria-label="Using the simulator"><!--[--><!--]--> Using the simulator <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/simulation_m1.html" class="sidebar-item" aria-label="Running simulator on M1 powered computer"><!--[--><!--]--> Running simulator on M1 powered computer <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/ros.html" class="sidebar-item" aria-label="ROS"><!--[--><!--]--> ROS <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/mavros.html" class="sidebar-item" aria-label="MAVROS"><!--[--><!--]--> MAVROS <!--[--><!--]--></a><!----></li><!--]--></ul><!--]--></li><li><p tabindex="0" class="sidebar-item sidebar-heading collapsible">Supplementary materials <span class="right arrow"></span></p><!--[--><ul style="display:none;" class="sidebar-item-children"><!--[--><li><a href="/clover-vuepress/en/supplementary.html" class="sidebar-item" aria-label="Supplementary materials"><!--[--><!--]--> Supplementary materials <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/coex_pix.html" class="sidebar-item" aria-label="COEX Pix"><!--[--><!--]--> COEX Pix <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/coex_pdb.html" class="sidebar-item" aria-label="COEX PDB"><!--[--><!--]--> COEX PDB <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/coex_gps.html" class="sidebar-item" aria-label="COEX GPS"><!--[--><!--]--> COEX GPS <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/auto_setup.html" class="sidebar-item" aria-label="Step-by-step guide on autonomous flight with Clover 4"><!--[--><!--]--> Step-by-step guide on autonomous flight with Clover 4 <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/hostname.html" class="sidebar-item" aria-label="Hostname"><!--[--><!--]--> Hostname <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/sitl.html" class="sidebar-item" aria-label="PX4 Simulation"><!--[--><!--]--> PX4 Simulation <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/wall_aruco.html" class="sidebar-item" aria-label="Navigation using vertical ArUco-markers"><!--[--><!--]--> Navigation using vertical ArUco-markers <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/calibratePID.html" class="sidebar-item" aria-label="Configuring the PID coefficients"><!--[--><!--]--> Configuring the PID coefficients <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/models.html" class="sidebar-item" aria-label="Model files for parts"><!--[--><!--]--> Model files for parts <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/ros-install.html" class="sidebar-item" aria-label="ROS Melodic package installation and setup"><!--[--><!--]--> ROS Melodic package installation and setup <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/camera_calibration.html" class="sidebar-item" aria-label="Camera calibration"><!--[--><!--]--> Camera calibration <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/zerotire_vpn.html" class="sidebar-item" aria-label="Creating a virtual network ZeroTier One and connecting to it"><!--[--><!--]--> Creating a virtual network ZeroTier One and connecting to it <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/4g.html" class="sidebar-item" aria-label="Multi-copter control with 4G communication"><!--[--><!--]--> Multi-copter control with 4G communication <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/jetson_nano.html" class="sidebar-item" aria-label="Clover and Jetson Nano"><!--[--><!--]--> Clover and Jetson Nano <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/rc.html" class="sidebar-item" aria-label="Controlling Clover from a smartphone"><!--[--><!--]--> Controlling Clover from a smartphone <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/network.html" class="sidebar-item" aria-label="Configuring Wi-Fi"><!--[--><!--]--> Configuring Wi-Fi <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/uart.html" class="sidebar-item" aria-label="UART interface"><!--[--><!--]--> UART interface <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/parameters.html" class="sidebar-item" aria-label="PX4 Parameters"><!--[--><!--]--> PX4 Parameters <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/flight_logs.html" class="sidebar-item" aria-label="PX4 Logs and Topics"><!--[--><!--]--> PX4 Logs and Topics <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/firmware.html" class="sidebar-item" aria-label="Pixhawk / Pixracer firmware flashing"><!--[--><!--]--> Pixhawk / Pixracer firmware flashing <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/mavlink.html" class="sidebar-item" aria-label="MAVLink"><!--[--><!--]--> MAVLink <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/test_connection.html" class="sidebar-item" aria-label="How to use a multimeter?"><!--[--><!--]--> How to use a multimeter? <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/radioerrors.html" class="sidebar-item" aria-label="Possible radio failures"><!--[--><!--]--> Possible radio failures <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/esc_firmware.html" class="sidebar-item" aria-label="Flashing ESCs using BLHeliSuite"><!--[--><!--]--> Flashing ESCs using BLHeliSuite <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/arduino.html" class="sidebar-item" aria-label="Controlling the copter from Arduino"><!--[--><!--]--> Controlling the copter from Arduino <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/gps.html" class="sidebar-item" aria-label="Connecting GPS"><!--[--><!--]--> Connecting GPS <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/ir_sensors.html" class="sidebar-item" aria-label="Working with IR sensors on Raspberry Pi 3"><!--[--><!--]--> Working with IR sensors on Raspberry Pi 3 <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/fpv_clover_4_2.html" class="sidebar-item" aria-label="Installing and configuring FPV equipment"><!--[--><!--]--> Installing and configuring FPV equipment <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/fpv.html" class="sidebar-item" aria-label="Installation of FPV"><!--[--><!--]--> Installation of FPV <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/magnetic_grip.html" class="sidebar-item" aria-label="Assembling and setting up the electromagnetic gripper"><!--[--><!--]--> Assembling and setting up the electromagnetic gripper <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/mechanical_grip.html" class="sidebar-item" aria-label="Assembling and setting up a mechanical gripper"><!--[--><!--]--> Assembling and setting up a mechanical gripper <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/trainer_mode.html" class="sidebar-item" aria-label="FlySky Trainer mode settings"><!--[--><!--]--> FlySky Trainer mode settings <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/tinning.html" class="sidebar-item" aria-label="Blanching"><!--[--><!--]--> Blanching <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/connectortypes.html" class="sidebar-item" aria-label="Types of power connectors"><!--[--><!--]--> Types of power connectors <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/4in1.html" class="sidebar-item" aria-label="Connecting 4 in 1 ESCs"><!--[--><!--]--> Connecting 4 in 1 ESCs <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/tb.html" class="sidebar-item" aria-label="Soldering safety"><!--[--><!--]--> Soldering safety <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/leds_old.html" class="sidebar-item" aria-label="Working with a LED strip on Raspberry 3"><!--[--><!--]--> Working with a LED strip on Raspberry 3 <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/contributing.html" class="sidebar-item" aria-label="Contribution to Clover"><!--[--><!--]--> Contribution to Clover <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/packages.html" class="sidebar-item" aria-label="COEX packages repository"><!--[--><!--]--> COEX packages repository <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/migrate20.html" class="sidebar-item" aria-label="Migration to version 0.20"><!--[--><!--]--> Migration to version 0.20 <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/migrate22.html" class="sidebar-item" aria-label="Migration to version 0.22"><!--[--><!--]--> Migration to version 0.22 <!--[--><!--]--></a><!----></li><!--]--></ul><!--]--></li><li><p tabindex="0" class="sidebar-item sidebar-heading active collapsible">Events <span class="down arrow"></span></p><!--[--><ul style="" class="sidebar-item-children"><!--[--><li><a href="/clover-vuepress/en/events.html" class="sidebar-item" aria-label="Events"><!--[--><!--]--> Events <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/copterhack2022.html" class="sidebar-item" aria-label="CopterHack 2022"><!--[--><!--]--> CopterHack 2022 <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/copterhack2021.html" class="sidebar-item" aria-label="CopterHack 2021"><!--[--><!--]--> CopterHack 2021 <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/copterhack2019.html" class="sidebar-item" aria-label="Copter Hack 2019"><!--[--><!--]--> Copter Hack 2019 <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/copterhack2018.html" class="sidebar-item" aria-label="Copter Hack 2018"><!--[--><!--]--> Copter Hack 2018 <!--[--><!--]--></a><!----></li><li><a aria-current="page" href="/clover-vuepress/en/copterhack2017.html" class="router-link-active router-link-exact-active router-link-active sidebar-item active" aria-label="Copter Hack 2017"><!--[--><!--]--> Copter Hack 2017 <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/video_contest.html" class="sidebar-item" aria-label="Contest for the best educational video on assembly and configuration"><!--[--><!--]--> Contest for the best educational video on assembly and configuration <!--[--><!--]--></a><!----></li><li><a href="/clover-vuepress/en/educational_contests.html" class="sidebar-item" aria-label="Educational contests"><!--[--><!--]--> Educational contests <!--[--><!--]--></a><!----></li><!--]--></ul><!--]--></li><!--]--></ul><!--[--><!--]--></aside><!--]--><!--[--><main class="page"><!--[--><!--]--><div class="theme-default-content"><!--[--><h1 id="copter-hack-2017" tabindex="-1"><a class="header-anchor" href="#copter-hack-2017" aria-hidden="true">#</a> Copter Hack 2017</h1><p>On July 28 – 30, 2017, Copter Express held a hackathon named "Copter Hack 2017", where the objective was to program a Clover to dance-fly autonomously to random music.</p><p>The team "Pangolins" became the winners.</p><iframe width="560" height="315" src="https://www.youtube.com/embed/xgXheg3TTs4?rel=0" frameborder="0" allowfullscreen></iframe><p>Video lectures are available at <a href="https://copterexpress.timepad.ru/event/510375/" target="_blank" rel="noopener noreferrer">https://copterexpress.timepad.ru/event/510375/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>.</p><h2 id="modules" tabindex="-1"><a class="header-anchor" href="#modules" aria-hidden="true">#</a> Modules</h2><ul><li><p>Navigation in the marker field and simplified copter control: <a href="https://github.com/CopterExpress/marker_navigator" target="_blank" rel="noopener noreferrer">https://github.com/CopterExpress/marker_navigator<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> (installed on the flash drive)</p></li><li><p>ROS module for communication with the music server <a href="https://github.com/CopterExpress/copter_hack_music" target="_blank" rel="noopener noreferrer">https://github.com/CopterExpress/copter_hack_music<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> (installed on a flash drive)</p></li><li><p>the source of the music server <a href="https://github.com/CopterExpress/copter_hack_music_server" target="_blank" rel="noopener noreferrer">https://github.com/CopterExpress/copter_hack_music_server<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></li></ul><h2 id="viewing-video-from-the-camera" tabindex="-1"><a class="header-anchor" href="#viewing-video-from-the-camera" aria-hidden="true">#</a> Viewing video from the camera</h2><p>To run on Raspberry:</p><div class="language-text ext-text"><pre class="language-text"><code>rosrun web_video_server web_video_server
</code></pre></div><p>In the browser, open webpage <code>http://<ip raspberry>:8080</code>.</p><p><strong>Attention</strong>: Video stream distribution greatly reduces the performance of marker recognition for the flight.</p><h2 id="ssid-wi-fi" tabindex="-1"><a class="header-anchor" href="#ssid-wi-fi" aria-hidden="true">#</a> SSID Wi-Fi</h2><p>To change the SSID of distributed Wi-Fi you should change the SSID parameter in any way in file<code>/etc/hostapd/hostapd.conf</code>.</p><h2 id="the-list-of-recognized-markers" tabindex="-1"><a class="header-anchor" href="#the-list-of-recognized-markers" aria-hidden="true">#</a> The list of recognized markers</h2><div class="language-text ext-text"><pre class="language-text"><code>rostopic echo /marker_data
</code></pre></div><h2 id="helpful-articles" tabindex="-1"><a class="header-anchor" href="#helpful-articles" aria-hidden="true">#</a> Helpful articles</h2><ul><li><p><a href="/clover-vuepress/en/setup.html" class="">Copter setup</a></p></li><li><p><a href="/clover-vuepress/en/modes.html" class="">Flight modes</a></p></li><li><p><a href="/clover-vuepress/en/mavros.html" class="">MAVRos package</a></p></li><li><p>A good introductory article: <a href="https://habrahabr.ru/post/227425/" target="_blank" rel="noopener noreferrer">https://habrahabr.ru/post/227425/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></li><li><p>Signals used in drones: <a href="https://geektimes.ru/post/258186/" target="_blank" rel="noopener noreferrer">https://geektimes.ru/post/258186/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></li><li><p>A good article about PIDs: <a href="https://habrahabr.ru/company/technoworks/blog/216437/" target="_blank" rel="noopener noreferrer">https://habrahabr.ru/company/technoworks/blog/216437/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></li><li><p>Video lectures are available at <a href="https://copterexpress.timepad.ru/event/510375/" target="_blank" rel="noopener noreferrer">https://copterexpress.timepad.ru/event/510375/<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>.</p></li><li><p><a href="https://aubio.org" target="_blank" rel="noopener noreferrer">Aubio<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a>, a library for sound (music) analysis</p></li><li><p>Packages for Python for working with music: <a href="https://wiki.python.org/moin/PythonInMusic" target="_blank" rel="noopener noreferrer">https://wiki.python.org/moin/PythonInMusic<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></p></li></ul><!--]--></div><footer class="page-meta"><div class="meta-item edit-link"><a class="external-link meta-item-label" href="https://github.com/CopterExpress/clover/edit/master/docs/en/copterhack2017.md" rel="noopener 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