{"id":253,"date":"2011-12-13T22:12:14","date_gmt":"2011-12-13T21:12:14","guid":{"rendered":"http:\/\/stigern.net\/blog\/?p=253"},"modified":"2011-12-20T08:07:23","modified_gmt":"2011-12-20T07:07:23","slug":"ultrasonic-hc-sr04-sensor","status":"publish","type":"post","link":"https:\/\/stigern.net\/blog\/ultrasonic-hc-sr04-sensor\/","title":{"rendered":"Ultrasonic HC-SR04 Sensor"},"content":{"rendered":"<p>I&#8217;ve stumbled by this neat little sonar sensor on eBay a few days ago, I&#8217;ve had some bad experiences with other similiar ultrasonic sensors so I was kind of\u00a0skeptic to this one. But for the low price I couldn&#8217;t resist. Anyhow, it turned out to be a great sensor. It&#8217;s\u00a0accurate\u00a0down to 1 cm, which is perfect and in most cases more than enough. You get it for around 5$ on eBay.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone\" title=\"HC-SR04\" src=\"http:\/\/www.stigern.net\/images\/hc-sr04.jpg\" alt=\"\" width=\"320\" height=\"245\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>Only problem I ran into when using it with arduino was the library, got some nasty compiling errors. So I changed a few lines in the library and made it work with Arduino 1.0 and older arduino IDEs.<\/p>\n<p><strong><a href=\"http:\/\/stigern.net\/forum\/download\/file.php?id=6\" target=\"_blank\">Download HC-SR04 Library for Arduino 1.0<\/a><\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone\" src=\"http:\/\/img7.imageshack.us\/img7\/9834\/img20111203184610.jpg\" alt=\"\" width=\"320\" height=\"240\" \/><\/p>\n<p>Also wrote a little example for using it with a serial display:<\/p>\n<p>&nbsp;<\/p>\n<div id=\"wpshdo_1\" class=\"wp-synhighlighter-outer\"><div id=\"wpshdt_1\" class=\"wp-synhighlighter-collapsed\"><table border=\"0\" width=\"100%\"><tr><td align=\"left\" width=\"80%\"><a name=\"#codesyntax_1\"><\/a><a id=\"wpshat_1\" class=\"wp-synhighlighter-title\" href=\"#codesyntax_1\"  onClick=\"javascript:wpsh_toggleBlock(1)\" title=\"Click to show\/hide code block\">Source code<\/a><\/td><td align=\"right\"><a href=\"#codesyntax_1\" onClick=\"javascript:wpsh_code(1)\" title=\"Show code only\"><img decoding=\"async\" border=\"0\" style=\"border: 0 none\" src=\"https:\/\/stigern.net\/blog\/wp-content\/plugins\/wp-synhighlight\/themes\/default\/images\/code.png\" \/><\/a>&nbsp;<a href=\"#codesyntax_1\" onClick=\"javascript:wpsh_print(1)\" title=\"Print code\"><img decoding=\"async\" border=\"0\" style=\"border: 0 none\" src=\"https:\/\/stigern.net\/blog\/wp-content\/plugins\/wp-synhighlight\/themes\/default\/images\/printer.png\" \/><\/a>&nbsp;<a href=\"https:\/\/stigern.net\/blog\/wp-content\/plugins\/wp-synhighlight\/About.html\" target=\"_blank\" title=\"Show plugin information\"><img decoding=\"async\" border=\"0\" style=\"border: 0 none\" src=\"https:\/\/stigern.net\/blog\/wp-content\/plugins\/wp-synhighlight\/themes\/default\/images\/info.gif\" \/><\/a>&nbsp;<\/td><\/tr><\/table><\/div><div id=\"wpshdi_1\" class=\"wp-synhighlighter-inner\" style=\"display: none;\"><pre class=\"cpp\" style=\"font-family:monospace;\"><span class=\"co2\">#include &lt;SoftwareSerial.h&gt;<\/span>\n<span class=\"co2\">#include &quot;Ultrasonic.h&quot;<\/span>\nUltrasonic ultrasonic<span class=\"br0\">&#40;<\/span>12,13<span class=\"br0\">&#41;<\/span><span class=\"sy4\">;<\/span>\n&nbsp;\nSoftwareSerial mySerial<span class=\"br0\">&#40;<\/span>5,4<span class=\"br0\">&#41;<\/span><span class=\"sy4\">;<\/span>\n&nbsp;\n<span class=\"kw4\">void<\/span> setup<span class=\"br0\">&#40;<\/span><span class=\"br0\">&#41;<\/span>\n<span class=\"br0\">&#123;<\/span>\nmySerial.<span class=\"me1\">begin<\/span><span class=\"br0\">&#40;<\/span>9600<span class=\"br0\">&#41;<\/span><span class=\"sy4\">;<\/span>\n<span class=\"br0\">&#125;<\/span>\n&nbsp;\n<span class=\"kw4\">void<\/span> loop<span class=\"br0\">&#40;<\/span><span class=\"br0\">&#41;<\/span>\n<span class=\"br0\">&#123;<\/span>\nmySerial.<span class=\"me1\">print<\/span><span class=\"br0\">&#40;<\/span><span class=\"st0\">&quot;Distance: &quot;<\/span><span class=\"br0\">&#41;<\/span><span class=\"sy4\">;<\/span>\nmySerial.<span class=\"me1\">print<\/span><span class=\"br0\">&#40;<\/span>ultrasonic.<span class=\"me1\">Ranging<\/span><span class=\"br0\">&#40;<\/span>CM<span class=\"br0\">&#41;<\/span><span class=\"br0\">&#41;<\/span><span class=\"sy4\">;<\/span>\nmySerial.<span class=\"me1\">println<\/span><span class=\"br0\">&#40;<\/span><span class=\"st0\">&quot; Cm.&quot;<\/span><span class=\"br0\">&#41;<\/span><span class=\"sy4\">;<\/span>\ndelay<span class=\"br0\">&#40;<\/span>250<span class=\"br0\">&#41;<\/span><span class=\"sy4\">;<\/span>\nmySerial.<span class=\"me1\">print<\/span><span class=\"br0\">&#40;<\/span><span class=\"st0\">&quot;?f&quot;<\/span><span class=\"br0\">&#41;<\/span><span class=\"sy4\">;<\/span> <span class=\"co1\">\/\/ Clear display.<\/span>\n<span class=\"br0\">&#125;<\/span><\/pre><\/div><\/div>\n<div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>I&#8217;ve stumbled by this neat little sonar sensor on eBay a few days ago, I&#8217;ve had some bad experiences with other similiar ultrasonic sensors so I was kind of\u00a0skeptic to this one. But for the low price I couldn&#8217;t resist. Anyhow, it turned out to be a great sensor. It&#8217;s\u00a0accurate\u00a0down to 1 cm, which is [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[14,4],"tags":[77,16,67,78,73,74,76,75,72,71],"class_list":["post-253","post","type-post","status-publish","format-standard","hentry","category-arduino-electronics","category-electronics","tag-1-0","tag-arduino","tag-cheap","tag-ebay","tag-hc","tag-hc-sr04","tag-library","tag-sensor","tag-sonar","tag-ultrasonic"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Ultrasonic HC-SR04 Sensor - Stigern.Net<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/stigern.net\/blog\/ultrasonic-hc-sr04-sensor\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ultrasonic HC-SR04 Sensor - Stigern.Net\" \/>\n<meta property=\"og:description\" content=\"I&#8217;ve stumbled by this neat little sonar sensor on eBay a few days ago, I&#8217;ve had some bad experiences with other similiar ultrasonic sensors so I was kind of\u00a0skeptic to this one. But for the low price I couldn&#8217;t resist. Anyhow, it turned out to be a great sensor. 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