{"id":1063,"date":"2025-08-14T07:37:44","date_gmt":"2025-08-14T07:37:44","guid":{"rendered":"https:\/\/blog.aetherix.com\/?p=1063"},"modified":"2026-03-27T13:45:40","modified_gmt":"2026-03-27T13:45:40","slug":"how-to-use-i2cdetect-on-nvidia-jetson-step-by-step-guide","status":"publish","type":"post","link":"https:\/\/blog.openzeka.com\/en\/how-to-use-i2cdetect-on-nvidia-jetson-step-by-step-guide\/","title":{"rendered":"How to Use i2cdetect on NVIDIA Jetson: Step-by-Step Guide"},"content":{"rendered":"<div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-1 fusion-flex-container has-pattern-background has-mask-background nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-padding-right:0px;--awb-padding-left:0px;--awb-flex-wrap:wrap;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap\" style=\"max-width:1331.2px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-0 fusion_builder_column_1_1 1_1 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-text fusion-text-1\"><p><span style=\"color: var(--awb-custom_color_2);\"><b>i2cdetect<\/b><\/span> is a command-line tool used on Linux-based systems to scan for I2C devices. It&#8217;s especially useful on embedded platforms like <a style=\"color: var(--awb-custom_color_1);\" href=\"https:\/\/blog.openzeka.com\/en\/nvidia-jetson-beginners-guide\/\">Jetson<\/a> to identify which I2C devices are connected to which bus. While some Jetson <a style=\"color: var(--awb-custom_color_1);\" href=\"https:\/\/aetherix.com\/product-category\/carrier-boards\/\">carrier boards<\/a> include pinout diagrams, these diagrams don\u2019t always clearly indicate the corresponding I2C <strong>bus numbers<\/strong>. With <span style=\"color: var(--awb-custom_color_2);\"><b>i2cdetect<\/b><\/span>, you can easily discover the active buses and determine where your I2C device is connected.<\/p>\n<p><strong>Required Materials:<\/strong><\/p>\n<ul>\n<li>Jetson Kits<\/li>\n<li>Any sensor that works with i2c<\/li>\n<li>Jumper Cables<\/li>\n<\/ul>\n<\/div><div class=\"fusion-title title fusion-title-1 fusion-sep-none fusion-title-text fusion-title-size-two\"><h2 class=\"fusion-title-heading title-heading-left\" style=\"margin:0;\">Connection<\/h2><\/div><div class=\"fusion-text fusion-text-2\"><p><strong>Identify the SCL, SDA, and GND pins<\/strong>\u00a0on your Jetson kits. You will use jumper wires to connect this i2c sensor to your Jetson device.<\/p>\n<\/div><div class=\"fusion-title title fusion-title-2 fusion-sep-none fusion-title-text fusion-title-size-two\"><h2 class=\"fusion-title-heading title-heading-left\" style=\"margin:0;\">Setup<\/h2><\/div><div class=\"fusion-text fusion-text-3\"><p>You can install it by entering the following command in your computer\u2019s terminal:<\/p>\n<\/div><style type=\"text\/css\" scopped=\"scopped\">.fusion-syntax-highlighter-1 > .CodeMirror, .fusion-syntax-highlighter-1 > .CodeMirror .CodeMirror-gutters {background-color:var(--awb-color6);}<\/style><div class=\"fusion-syntax-highlighter-container fusion-syntax-highlighter-1 fusion-syntax-highlighter-theme-dark\" style=\"opacity:0;margin-top:0px;margin-right:0px;margin-bottom:16px;margin-left:0px;font-size:14px;border-width:1px;border-style:solid;border-color:rgba(242,243,245,0);\"><div class=\"syntax-highlighter-copy-code\"><span class=\"syntax-highlighter-copy-code-title\" data-id=\"fusion_syntax_highlighter_1\" style=\"font-size:14px;\">Copy to Clipboard<\/span><\/div><label for=\"fusion_syntax_highlighter_1\" class=\"screen-reader-text\">Syntax Highlighter<\/label><textarea class=\"fusion-syntax-highlighter-textarea\" id=\"fusion_syntax_highlighter_1\" data-readOnly=\"nocursor\" data-lineNumbers=\"\" data-lineWrapping=\"\" data-theme=\"oceanic-next\" data-mode=\"text\/x-sh\">sudo apt-get install -y i2c-tools<\/textarea><\/div><div class=\"fusion-image-element \" style=\"--awb-margin-bottom:16px;--awb-caption-title-font-family:var(--h2_typography-font-family);--awb-caption-title-font-weight:var(--h2_typography-font-weight);--awb-caption-title-font-style:var(--h2_typography-font-style);--awb-caption-title-size:var(--h2_typography-font-size);--awb-caption-title-transform:var(--h2_typography-text-transform);--awb-caption-title-line-height:var(--h2_typography-line-height);--awb-caption-title-letter-spacing:var(--h2_typography-letter-spacing);\"><span class=\" fusion-imageframe imageframe-none imageframe-1 hover-type-none\"><img decoding=\"async\" width=\"820\" height=\"493\" title=\"image1\" src=\"https:\/\/blog.openzeka.com\/en\/wp-content\/uploads\/2025\/07\/image1-3.webp\" alt class=\"img-responsive wp-image-1067\" srcset=\"https:\/\/blog.openzeka.com\/en\/wp-content\/uploads\/2025\/07\/image1-3-200x120.webp 200w, https:\/\/blog.openzeka.com\/en\/wp-content\/uploads\/2025\/07\/image1-3-300x180.webp 300w, https:\/\/blog.openzeka.com\/en\/wp-content\/uploads\/2025\/07\/image1-3-400x240.webp 400w, https:\/\/blog.openzeka.com\/en\/wp-content\/uploads\/2025\/07\/image1-3-600x361.webp 600w, https:\/\/blog.openzeka.com\/en\/wp-content\/uploads\/2025\/07\/image1-3-768x462.webp 768w, https:\/\/blog.openzeka.com\/en\/wp-content\/uploads\/2025\/07\/image1-3-800x481.webp 800w, https:\/\/blog.openzeka.com\/en\/wp-content\/uploads\/2025\/07\/image1-3.webp 820w\" sizes=\"(max-width: 640px) 100vw, 820px\" \/><\/span><\/div><div class=\"fusion-text fusion-text-4 fusion-text-no-margin\" style=\"--awb-margin-bottom:10px;\"><p>If you get output similar to the command below, the tool has been installed successfully.<\/p>\n<\/div><style type=\"text\/css\" scopped=\"scopped\">.fusion-syntax-highlighter-2 > .CodeMirror, .fusion-syntax-highlighter-2 > .CodeMirror .CodeMirror-gutters {background-color:var(--awb-color6);}<\/style><div class=\"fusion-syntax-highlighter-container fusion-syntax-highlighter-2 fusion-syntax-highlighter-theme-dark\" style=\"opacity:0;margin-top:0px;margin-right:0px;margin-bottom:16px;margin-left:0px;font-size:14px;border-width:1px;border-style:solid;border-color:rgba(242,243,245,0);\"><div class=\"syntax-highlighter-copy-code\"><span class=\"syntax-highlighter-copy-code-title\" data-id=\"fusion_syntax_highlighter_2\" style=\"font-size:14px;\">Copy to Clipboard<\/span><\/div><label for=\"fusion_syntax_highlighter_2\" class=\"screen-reader-text\">Syntax Highlighter<\/label><textarea class=\"fusion-syntax-highlighter-textarea\" id=\"fusion_syntax_highlighter_2\" data-readOnly=\"nocursor\" data-lineNumbers=\"\" data-lineWrapping=\"\" data-theme=\"oceanic-next\" data-mode=\"text\/x-sh\">apt-cache policy i2c-tools<\/textarea><\/div><div class=\"fusion-image-element \" style=\"--awb-margin-bottom:16px;--awb-caption-title-font-family:var(--h2_typography-font-family);--awb-caption-title-font-weight:var(--h2_typography-font-weight);--awb-caption-title-font-style:var(--h2_typography-font-style);--awb-caption-title-size:var(--h2_typography-font-size);--awb-caption-title-transform:var(--h2_typography-text-transform);--awb-caption-title-line-height:var(--h2_typography-line-height);--awb-caption-title-letter-spacing:var(--h2_typography-letter-spacing);\"><span class=\" fusion-imageframe imageframe-none imageframe-2 hover-type-none\"><img decoding=\"async\" width=\"820\" height=\"493\" title=\"image2\" src=\"https:\/\/blog.openzeka.com\/en\/wp-content\/uploads\/2025\/07\/image2-2.webp\" alt class=\"img-responsive wp-image-1069\" srcset=\"https:\/\/blog.openzeka.com\/en\/wp-content\/uploads\/2025\/07\/image2-2-200x120.webp 200w, https:\/\/blog.openzeka.com\/en\/wp-content\/uploads\/2025\/07\/image2-2-300x180.webp 300w, https:\/\/blog.openzeka.com\/en\/wp-content\/uploads\/2025\/07\/image2-2-400x240.webp 400w, https:\/\/blog.openzeka.com\/en\/wp-content\/uploads\/2025\/07\/image2-2-600x361.webp 600w, https:\/\/blog.openzeka.com\/en\/wp-content\/uploads\/2025\/07\/image2-2-768x462.webp 768w, https:\/\/blog.openzeka.com\/en\/wp-content\/uploads\/2025\/07\/image2-2-800x481.webp 800w, https:\/\/blog.openzeka.com\/en\/wp-content\/uploads\/2025\/07\/image2-2.webp 820w\" sizes=\"(max-width: 640px) 100vw, 820px\" \/><\/span><\/div><div class=\"fusion-text fusion-text-5 fusion-text-no-margin\" style=\"--awb-margin-bottom:10px;\"><p>You can also get the information of the I2C devices wired to the specific I2C bus. With the following command you should be able to find the available i2C addresses to the chips\/devices connected.<\/p>\n<\/div><style type=\"text\/css\" scopped=\"scopped\">.fusion-syntax-highlighter-3 > .CodeMirror, .fusion-syntax-highlighter-3 > .CodeMirror .CodeMirror-gutters {background-color:var(--awb-color6);}<\/style><div class=\"fusion-syntax-highlighter-container fusion-syntax-highlighter-3 fusion-syntax-highlighter-theme-dark\" style=\"opacity:0;margin-top:0px;margin-right:0px;margin-bottom:16px;margin-left:0px;font-size:14px;border-width:1px;border-style:solid;border-color:rgba(242,243,245,0);\"><div class=\"syntax-highlighter-copy-code\"><span class=\"syntax-highlighter-copy-code-title\" data-id=\"fusion_syntax_highlighter_3\" style=\"font-size:14px;\">Copy to Clipboard<\/span><\/div><label for=\"fusion_syntax_highlighter_3\" class=\"screen-reader-text\">Syntax Highlighter<\/label><textarea class=\"fusion-syntax-highlighter-textarea\" id=\"fusion_syntax_highlighter_3\" data-readOnly=\"nocursor\" data-lineNumbers=\"\" data-lineWrapping=\"\" data-theme=\"oceanic-next\" data-mode=\"text\/x-sh\">sudo i2cdetect -r -y <BUS NUMBER><\/textarea><\/div><div class=\"fusion-text fusion-text-6 fusion-text-no-margin\" style=\"--awb-margin-bottom:10px;\"><p>In the following example, we are checking bus number 7. Since no sensors are currently installed, no address is visible.<\/p>\n<\/div><div class=\"fusion-image-element \" style=\"--awb-margin-bottom:16px;--awb-caption-title-font-family:var(--h2_typography-font-family);--awb-caption-title-font-weight:var(--h2_typography-font-weight);--awb-caption-title-font-style:var(--h2_typography-font-style);--awb-caption-title-size:var(--h2_typography-font-size);--awb-caption-title-transform:var(--h2_typography-text-transform);--awb-caption-title-line-height:var(--h2_typography-line-height);--awb-caption-title-letter-spacing:var(--h2_typography-letter-spacing);\"><span class=\" fusion-imageframe imageframe-none imageframe-3 hover-type-none\"><img decoding=\"async\" width=\"820\" height=\"493\" title=\"image3\" src=\"https:\/\/blog.openzeka.com\/en\/wp-content\/uploads\/2025\/07\/image3-2.webp\" alt class=\"img-responsive wp-image-1071\" srcset=\"https:\/\/blog.openzeka.com\/en\/wp-content\/uploads\/2025\/07\/image3-2-200x120.webp 200w, https:\/\/blog.openzeka.com\/en\/wp-content\/uploads\/2025\/07\/image3-2-300x180.webp 300w, https:\/\/blog.openzeka.com\/en\/wp-content\/uploads\/2025\/07\/image3-2-400x240.webp 400w, https:\/\/blog.openzeka.com\/en\/wp-content\/uploads\/2025\/07\/image3-2-600x361.webp 600w, https:\/\/blog.openzeka.com\/en\/wp-content\/uploads\/2025\/07\/image3-2-768x462.webp 768w, https:\/\/blog.openzeka.com\/en\/wp-content\/uploads\/2025\/07\/image3-2-800x481.webp 800w, https:\/\/blog.openzeka.com\/en\/wp-content\/uploads\/2025\/07\/image3-2.webp 820w\" sizes=\"(max-width: 640px) 100vw, 820px\" \/><\/span><\/div><div class=\"fusion-text fusion-text-7 fusion-text-no-margin\" style=\"--awb-margin-bottom:10px;\"><p>When we plug an i2c working sensor into Jetson, you can see the numbers 30, this mean that the there is one devices wired to the I2C bus 7. These devices have an specific address that is used to communicate with the device,<\/p>\n<\/div><div class=\"fusion-image-element \" style=\"--awb-margin-bottom:16px;--awb-caption-title-font-family:var(--h2_typography-font-family);--awb-caption-title-font-weight:var(--h2_typography-font-weight);--awb-caption-title-font-style:var(--h2_typography-font-style);--awb-caption-title-size:var(--h2_typography-font-size);--awb-caption-title-transform:var(--h2_typography-text-transform);--awb-caption-title-line-height:var(--h2_typography-line-height);--awb-caption-title-letter-spacing:var(--h2_typography-letter-spacing);\"><span class=\" fusion-imageframe imageframe-none imageframe-4 hover-type-none\"><img decoding=\"async\" width=\"820\" height=\"493\" title=\"image4\" src=\"https:\/\/blog.openzeka.com\/en\/wp-content\/uploads\/2025\/07\/image4-1.webp\" alt class=\"img-responsive wp-image-1073\" srcset=\"https:\/\/blog.openzeka.com\/en\/wp-content\/uploads\/2025\/07\/image4-1-200x120.webp 200w, https:\/\/blog.openzeka.com\/en\/wp-content\/uploads\/2025\/07\/image4-1-300x180.webp 300w, https:\/\/blog.openzeka.com\/en\/wp-content\/uploads\/2025\/07\/image4-1-400x240.webp 400w, https:\/\/blog.openzeka.com\/en\/wp-content\/uploads\/2025\/07\/image4-1-600x361.webp 600w, https:\/\/blog.openzeka.com\/en\/wp-content\/uploads\/2025\/07\/image4-1-768x462.webp 768w, https:\/\/blog.openzeka.com\/en\/wp-content\/uploads\/2025\/07\/image4-1-800x481.webp 800w, https:\/\/blog.openzeka.com\/en\/wp-content\/uploads\/2025\/07\/image4-1.webp 820w\" sizes=\"(max-width: 640px) 100vw, 820px\" \/><\/span><\/div><div class=\"fusion-text fusion-text-8 fusion-text-no-margin\" style=\"--awb-margin-bottom:10px;\"><p>You can find the bus numbers in the manual of the kit you&#8217;re using. Since we used the d131L, pins 3 and 5 were connected to bus 7. That&#8217;s why we made our checks here.<\/p>\n<\/div><\/div><\/div><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":1608,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12],"tags":[],"class_list":["post-1063","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-getting-started"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.3.1 (Yoast SEO v25.3.1) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How to Use i2cdetect on NVIDIA Jetson: Step-by-Step Guide<\/title>\n<meta name=\"description\" content=\"Use i2cdetect on Jetson to scan I2C buses and find connected devices. 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