{"id":9677,"date":"2024-03-20T11:14:20","date_gmt":"2024-03-20T11:14:20","guid":{"rendered":"https:\/\/www.bairesdev.com\/tools\/tessel\/?p=9677"},"modified":"2024-05-09T11:06:12","modified_gmt":"2024-05-09T11:06:12","slug":"servo","status":"publish","type":"post","link":"https:\/\/www.bairesdev.com\/tools\/tessel\/modules\/servo\/","title":{"rendered":"Servo"},"content":{"rendered":"\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_66_1 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title \" >Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.bairesdev.com\/tools\/tessel\/modules\/servo\/#STEP_1\" title=\"STEP 1\">STEP 1<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.bairesdev.com\/tools\/tessel\/modules\/servo\/#STEP_2\" title=\"STEP 2\">STEP 2<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.bairesdev.com\/tools\/tessel\/modules\/servo\/#STEP_3\" title=\"STEP 3\">STEP 3<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.bairesdev.com\/tools\/tessel\/modules\/servo\/#STEP_4\" title=\"STEP 4\">STEP 4<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.bairesdev.com\/tools\/tessel\/modules\/servo\/#STEP_5\" title=\"STEP 5\">STEP 5<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.bairesdev.com\/tools\/tessel\/modules\/servo\/#STEP_6\" title=\"STEP 6\">STEP 6<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.bairesdev.com\/tools\/tessel\/modules\/servo\/#STEP_7\" title=\"STEP 7\">STEP 7<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.bairesdev.com\/tools\/tessel\/modules\/servo\/#STEP_8\" title=\"STEP 8\">STEP 8<\/a><\/li><\/ul><\/nav><\/div>\n<h3 class=\"wp-block-heading\" id=\"step-1\"><span class=\"ez-toc-section\" id=\"STEP_1\"><\/span>STEP 1<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Make a directory inside your \u201ctessel-code\u201d folder called \u201cservo\u201d, change directory into that folder, and initialize a tessel project:<\/p>\n\n\n\n<div class=\"wp-block-kevinbatdorf-code-block-pro\" data-code-block-pro-font-family=\"Code-Pro-JetBrains-Mono\" style=\"font-size:.875rem;font-family:Code-Pro-JetBrains-Mono,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;line-height:1.25rem;--cbp-tab-width:2;tab-size:var(--cbp-tab-width, 2)\"><span style=\"display:block;padding:16px 0 0 16px;margin-bottom:-1px;width:100%;text-align:left;background-color:#2e3440ff\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"54\" height=\"14\" viewBox=\"0 0 54 14\"><g fill=\"none\" fill-rule=\"evenodd\" transform=\"translate(1 1)\"><circle cx=\"6\" cy=\"6\" r=\"6\" fill=\"#FF5F56\" stroke=\"#E0443E\" stroke-width=\".5\"><\/circle><circle cx=\"26\" cy=\"6\" r=\"6\" fill=\"#FFBD2E\" stroke=\"#DEA123\" stroke-width=\".5\"><\/circle><circle cx=\"46\" cy=\"6\" r=\"6\" fill=\"#27C93F\" stroke=\"#1AAB29\" stroke-width=\".5\"><\/circle><\/g><\/svg><\/span><span role=\"button\" tabindex=\"0\" data-code=\"mkdir servo; cd servo; t2 init\" style=\"color:#d8dee9ff;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"width:24px;height:24px\" fill=\"none\" viewBox=\"0 0 24 24\" stroke=\"currentColor\" stroke-width=\"2\"><path class=\"with-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2m-6 9l2 2 4-4\"><\/path><path class=\"without-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2\"><\/path><\/svg><\/span><pre class=\"shiki nord\" style=\"background-color: #2e3440ff\" tabindex=\"0\"><code><span class=\"line\"><span style=\"color: #88C0D0\">mkdir<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #A3BE8C\">servo<\/span><span style=\"color: #81A1C1\">;<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">cd<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #A3BE8C\">servo<\/span><span style=\"color: #81A1C1\">;<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">t2<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #A3BE8C\">init<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"step-2\"><span class=\"ez-toc-section\" id=\"STEP_2\"><\/span>STEP 2<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"alignright size-full is-resized\"><img fetchpriority=\"high\" decoding=\"async\" width=\"400\" height=\"267\" src=\"https:\/\/www.bairesdev.com\/tools\/tessel\/wp-content\/uploads\/2024\/03\/servo-module-tessel-1.jpg\" alt=\"\" class=\"wp-image-9678\" style=\"width:295px;height:auto\" srcset=\"https:\/\/www.bairesdev.com\/tools\/tessel\/wp-content\/uploads\/2024\/03\/servo-module-tessel-1.jpg 400w, https:\/\/www.bairesdev.com\/tools\/tessel\/wp-content\/uploads\/2024\/03\/servo-module-tessel-1-300x200.jpg 300w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/figure>\n<\/div>\n\n\n<p>Plug servo into port \u201c1\u201d on the module as shown.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>the brown wire (ground) goes to&nbsp;<code>-<\/code><\/li>\n\n\n\n<li>the red wire (power) goes to&nbsp;<code>+<\/code><\/li>\n\n\n\n<li>the yellow wire (signal) goes to&nbsp;<code>S<\/code><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"step-3\"><span class=\"ez-toc-section\" id=\"STEP_3\"><\/span>STEP 3<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"alignright size-full\"><img decoding=\"async\" width=\"400\" height=\"267\" src=\"https:\/\/www.bairesdev.com\/tools\/tessel\/wp-content\/uploads\/2024\/03\/servo-module-tessel-2.png\" alt=\"\" class=\"wp-image-9679\" srcset=\"https:\/\/www.bairesdev.com\/tools\/tessel\/wp-content\/uploads\/2024\/03\/servo-module-tessel-2.png 400w, https:\/\/www.bairesdev.com\/tools\/tessel\/wp-content\/uploads\/2024\/03\/servo-module-tessel-2-300x200.png 300w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/figure>\n<\/div>\n\n\n<p>Plug 5V adapter into the barrel jack on the servo module, then plug into wall power.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"step-4\"><span class=\"ez-toc-section\" id=\"STEP_4\"><\/span>STEP 4<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Plug the servo module into Tessel&nbsp;<strong>port A<\/strong>&nbsp;with the hexagon\/icon side down and the electrical components on the top, then plug Tessel into your computer via USB.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"step-5\"><span class=\"ez-toc-section\" id=\"STEP_5\"><\/span>STEP 5<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Install by typing&nbsp;<code>npm install servo-pca9685<\/code>&nbsp;into the command line.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"step-6\"><span class=\"ez-toc-section\" id=\"STEP_6\"><\/span>STEP 6<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Rename \u201cindex.js\u201d to \u201cservo.js\u201d and replace the file\u2019s contents with the following:<\/p>\n\n\n\n<div class=\"wp-block-kevinbatdorf-code-block-pro\" data-code-block-pro-font-family=\"Code-Pro-JetBrains-Mono\" style=\"font-size:.875rem;font-family:Code-Pro-JetBrains-Mono,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;line-height:1.25rem;--cbp-tab-width:2;tab-size:var(--cbp-tab-width, 2)\"><span style=\"display:block;padding:16px 0 0 16px;margin-bottom:-1px;width:100%;text-align:left;background-color:#2e3440ff\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"54\" height=\"14\" viewBox=\"0 0 54 14\"><g fill=\"none\" fill-rule=\"evenodd\" transform=\"translate(1 1)\"><circle cx=\"6\" cy=\"6\" r=\"6\" fill=\"#FF5F56\" stroke=\"#E0443E\" stroke-width=\".5\"><\/circle><circle cx=\"26\" cy=\"6\" r=\"6\" fill=\"#FFBD2E\" stroke=\"#DEA123\" stroke-width=\".5\"><\/circle><circle cx=\"46\" cy=\"6\" r=\"6\" fill=\"#27C93F\" stroke=\"#1AAB29\" stroke-width=\".5\"><\/circle><\/g><\/svg><\/span><span role=\"button\" tabindex=\"0\" data-code=\"\/\/ Any copyright is dedicated to the Public Domain.\n\/\/ http:\/\/creativecommons.org\/publicdomain\/zero\/1.0\/\n\n\/*********************************************\nThis servo module demo turns the servo around\n1\/10 of its full rotation  every 500ms, then\nresets it after 10 turns, reading out position\nto the console at each movement.\n*********************************************\/\n\nvar tessel = require('tessel');\nvar servolib = require('servo-pca9685');\n\nvar servo = servolib.use(tessel.port['A']);\n\nvar servo1 = 1; \/\/ We have a servo plugged in at position 1\n\nservo.on('ready', function () {\n  var position = 0;  \/\/  Target position of the servo between 0 (min) and 1 (max).\n\n  \/\/  Set the minimum and maximum duty cycle for servo 1.\n  \/\/  If the servo doesn't move to its full extent or stalls out\n  \/\/  and gets hot, try tuning these values (0.05 and 0.12).\n  \/\/  Moving them towards each other = less movement range\n  \/\/  Moving them apart = more range, more likely to stall and burn out\n  servo.configure(servo1, 0.05, 0.12, function () {\n    setInterval(function () {\n      console.log('Position (in range 0-1):', position);\n      \/\/  Set servo #1 to position pos.\n      servo.move(servo1, position);\n\n      \/\/ Increment by 10% (~18 deg for a normal servo)\n      position += 0.1;\n      if (position &gt; 1) {\n        position = 0; \/\/ Reset servo position\n      }\n    }, 500); \/\/ Every 500 milliseconds\n  });\n});\" style=\"color:#d8dee9ff;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"width:24px;height:24px\" fill=\"none\" viewBox=\"0 0 24 24\" stroke=\"currentColor\" stroke-width=\"2\"><path class=\"with-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2m-6 9l2 2 4-4\"><\/path><path class=\"without-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2\"><\/path><\/svg><\/span><pre class=\"shiki nord\" style=\"background-color: #2e3440ff\" tabindex=\"0\"><code><span class=\"line\"><span style=\"color: #616E88\">\/\/ Any copyright is dedicated to the Public Domain.<\/span><\/span>\n<span class=\"line\"><span style=\"color: #616E88\">\/\/ http:\/\/creativecommons.org\/publicdomain\/zero\/1.0\/<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #616E88\">\/*********************************************<\/span><\/span>\n<span class=\"line\"><span style=\"color: #616E88\">This servo module demo turns the servo around<\/span><\/span>\n<span class=\"line\"><span style=\"color: #616E88\">1\/10 of its full rotation  every 500ms, then<\/span><\/span>\n<span class=\"line\"><span style=\"color: #616E88\">resets it after 10 turns, reading out position<\/span><\/span>\n<span class=\"line\"><span style=\"color: #616E88\">to the console at each movement.<\/span><\/span>\n<span class=\"line\"><span style=\"color: #616E88\">*********************************************\/<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #81A1C1\">var<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">tessel<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">require<\/span><span style=\"color: #D8DEE9FF\">(<\/span><span style=\"color: #ECEFF4\">&#39;<\/span><span style=\"color: #A3BE8C\">tessel<\/span><span style=\"color: #ECEFF4\">&#39;<\/span><span style=\"color: #D8DEE9FF\">)<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #81A1C1\">var<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">servolib<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">require<\/span><span style=\"color: #D8DEE9FF\">(<\/span><span style=\"color: #ECEFF4\">&#39;<\/span><span style=\"color: #A3BE8C\">servo-pca9685<\/span><span style=\"color: #ECEFF4\">&#39;<\/span><span style=\"color: #D8DEE9FF\">)<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #81A1C1\">var<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">servo<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">servolib<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #88C0D0\">use<\/span><span style=\"color: #D8DEE9FF\">(<\/span><span style=\"color: #D8DEE9\">tessel<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9\">port<\/span><span style=\"color: #D8DEE9FF\">[<\/span><span style=\"color: #ECEFF4\">&#39;<\/span><span style=\"color: #A3BE8C\">A<\/span><span style=\"color: #ECEFF4\">&#39;<\/span><span style=\"color: #D8DEE9FF\">])<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #81A1C1\">var<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">servo1<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #B48EAD\">1<\/span><span style=\"color: #81A1C1\">;<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #616E88\">\/\/ We have a servo plugged in at position 1<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9\">servo<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #88C0D0\">on<\/span><span style=\"color: #D8DEE9FF\">(<\/span><span style=\"color: #ECEFF4\">&#39;<\/span><span style=\"color: #A3BE8C\">ready<\/span><span style=\"color: #ECEFF4\">&#39;<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">function<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">()<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">  <\/span><span style=\"color: #81A1C1\">var<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">position<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #B48EAD\">0<\/span><span style=\"color: #81A1C1\">;<\/span><span style=\"color: #D8DEE9FF\">  <\/span><span style=\"color: #616E88\">\/\/  Target position of the servo between 0 (min) and 1 (max).<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #ECEFF4\">  <\/span><span style=\"color: #616E88\">\/\/  Set the minimum and maximum duty cycle for servo 1.<\/span><\/span>\n<span class=\"line\"><span style=\"color: #ECEFF4\">  <\/span><span style=\"color: #616E88\">\/\/  If the servo doesn&#39;t move to its full extent or stalls out<\/span><\/span>\n<span class=\"line\"><span style=\"color: #ECEFF4\">  <\/span><span style=\"color: #616E88\">\/\/  and gets hot, try tuning these values (0.05 and 0.12).<\/span><\/span>\n<span class=\"line\"><span style=\"color: #ECEFF4\">  <\/span><span style=\"color: #616E88\">\/\/  Moving them towards each other = less movement range<\/span><\/span>\n<span class=\"line\"><span style=\"color: #ECEFF4\">  <\/span><span style=\"color: #616E88\">\/\/  Moving them apart = more range, more likely to stall and burn out<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">  <\/span><span style=\"color: #D8DEE9\">servo<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #88C0D0\">configure<\/span><span style=\"color: #D8DEE9FF\">(<\/span><span style=\"color: #D8DEE9\">servo1<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #B48EAD\">0.05<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #B48EAD\">0.12<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">function<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">()<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    <\/span><span style=\"color: #88C0D0\">setInterval<\/span><span style=\"color: #D8DEE9FF\">(<\/span><span style=\"color: #81A1C1\">function<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">()<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">      <\/span><span style=\"color: #D8DEE9\">console<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #88C0D0\">log<\/span><span style=\"color: #D8DEE9FF\">(<\/span><span style=\"color: #ECEFF4\">&#39;<\/span><span style=\"color: #A3BE8C\">Position (in range 0-1):<\/span><span style=\"color: #ECEFF4\">&#39;<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">position<\/span><span style=\"color: #D8DEE9FF\">)<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #ECEFF4\">      <\/span><span style=\"color: #616E88\">\/\/  Set servo #1 to position pos.<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">      <\/span><span style=\"color: #D8DEE9\">servo<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #88C0D0\">move<\/span><span style=\"color: #D8DEE9FF\">(<\/span><span style=\"color: #D8DEE9\">servo1<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">position<\/span><span style=\"color: #D8DEE9FF\">)<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #ECEFF4\">      <\/span><span style=\"color: #616E88\">\/\/ Increment by 10% (~18 deg for a normal servo)<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">      <\/span><span style=\"color: #D8DEE9\">position<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">+=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #B48EAD\">0.1<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">      <\/span><span style=\"color: #81A1C1\">if<\/span><span style=\"color: #D8DEE9FF\"> (<\/span><span style=\"color: #D8DEE9\">position<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">&gt;<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #B48EAD\">1<\/span><span style=\"color: #D8DEE9FF\">) <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">        <\/span><span style=\"color: #D8DEE9\">position<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #B48EAD\">0<\/span><span style=\"color: #81A1C1\">;<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #616E88\">\/\/ Reset servo position<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">      <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    <\/span><span style=\"color: #ECEFF4\">},<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #B48EAD\">500<\/span><span style=\"color: #D8DEE9FF\">)<\/span><span style=\"color: #81A1C1\">;<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #616E88\">\/\/ Every 500 milliseconds<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">  <\/span><span style=\"color: #ECEFF4\">}<\/span><span style=\"color: #D8DEE9FF\">)<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #ECEFF4\">}<\/span><span style=\"color: #D8DEE9FF\">)<\/span><span style=\"color: #81A1C1\">;<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n<p>Save the file.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"step-7\"><span class=\"ez-toc-section\" id=\"STEP_7\"><\/span>STEP 7<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"alignright size-full\"><img decoding=\"async\" width=\"400\" height=\"225\" src=\"https:\/\/www.bairesdev.com\/tools\/tessel\/wp-content\/uploads\/2024\/03\/servo-module-tessel-animation.gif\" alt=\"\" class=\"wp-image-9680\"\/><\/figure>\n<\/div>\n\n\n<p>In your command line,&nbsp;<code>t2 run servo.js<\/code>&nbsp;Watch your servo move!<\/p>\n\n\n\n<p><strong>Bonus:<\/strong>&nbsp;Make the servo turn all the way to position 1 in one fell swoop, and then back to position 0.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"step-8\"><span class=\"ez-toc-section\" id=\"STEP_8\"><\/span>STEP 8<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>What else can you do with a servo module? Try a\u00a0<a href=\"https:\/\/www.bairesdev.com\/tools\/tessel\/blog\/8-awesome-tessel-projects\/\">community-created project.<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>STEP 1 Make a directory inside your \u201ctessel-code\u201d folder called \u201cservo\u201d, change directory into that folder, and initialize a tessel project: STEP 2 Plug servo into port \u201c1\u201d on the module as shown. STEP 3 Plug 5V adapter into the barrel jack on the servo module, then plug into wall power. STEP 4 Plug the [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":9681,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"class_list":["post-9677","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-modules"],"_links":{"self":[{"href":"https:\/\/www.bairesdev.com\/tools\/tessel\/wp-json\/wp\/v2\/posts\/9677","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bairesdev.com\/tools\/tessel\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bairesdev.com\/tools\/tessel\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bairesdev.com\/tools\/tessel\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bairesdev.com\/tools\/tessel\/wp-json\/wp\/v2\/comments?post=9677"}],"version-history":[{"count":2,"href":"https:\/\/www.bairesdev.com\/tools\/tessel\/wp-json\/wp\/v2\/posts\/9677\/revisions"}],"predecessor-version":[{"id":10052,"href":"https:\/\/www.bairesdev.com\/tools\/tessel\/wp-json\/wp\/v2\/posts\/9677\/revisions\/10052"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bairesdev.com\/tools\/tessel\/wp-json\/wp\/v2\/media\/9681"}],"wp:attachment":[{"href":"https:\/\/www.bairesdev.com\/tools\/tessel\/wp-json\/wp\/v2\/media?parent=9677"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bairesdev.com\/tools\/tessel\/wp-json\/wp\/v2\/categories?post=9677"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bairesdev.com\/tools\/tessel\/wp-json\/wp\/v2\/tags?post=9677"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}