{"id":2595,"date":"2017-02-05T18:54:37","date_gmt":"2017-02-05T23:54:37","guid":{"rendered":"http:\/\/protofusion.org\/wordpress\/?p=2595"},"modified":"2025-11-13T22:09:03","modified_gmt":"2025-11-14T03:09:03","slug":"hydrobot-connecting-the-modules","status":"publish","type":"post","link":"http:\/\/protofusion.org\/wordpress\/2017\/02\/hydrobot-connecting-the-modules\/","title":{"rendered":"HydroBot: Connecting the Modules"},"content":{"rendered":"<p>HydroHub is a <a href=\"http:\/\/protofusion.org\/wordpress\/2016\/07\/hydrobot\/\">HydroBot<\/a> module designed to connect together HydroBot modules in a star topology. The hub provides power and CAN connectivity to a total of\u00a0eight channels. It has a DC barrel jack for connecting an external power supply, as well as selectable termination for the CAN bus.<\/p>\n<p><!--more--><\/p>\n<h5>HydroHub Features:<\/h5>\n<ul>\n<li>8 channels for connecting HydroBot modules<\/li>\n<li>5.5mm DC barrel jack for power input<\/li>\n<li>6-30V input works with 12V and\u00a024V systems<\/li>\n<li>Selectable 120\u03a9 CAN bus termination resistor<\/li>\n<li>Power indication LED<\/li>\n<li>JST-PA series connectors<\/li>\n<li>Open source\u00a0design<\/li>\n<\/ul>\n<div id=\"attachment_2619\" style=\"width: 310px\" class=\"wp-caption alignright\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-2619\" class=\"wp-image-2619 size-medium\" src=\"http:\/\/protofusion.org\/wordpress\/wp-content\/uploads\/2017\/02\/JST-PA-Connectors-300x200.jpg\" width=\"300\" height=\"200\" srcset=\"http:\/\/protofusion.org\/wordpress\/wp-content\/uploads\/2017\/02\/JST-PA-Connectors-300x200.jpg 300w, http:\/\/protofusion.org\/wordpress\/wp-content\/uploads\/2017\/02\/JST-PA-Connectors-768x512.jpg 768w, http:\/\/protofusion.org\/wordpress\/wp-content\/uploads\/2017\/02\/JST-PA-Connectors-600x400.jpg 600w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><p id=\"caption-attachment-2619\" class=\"wp-caption-text\">JST-PA Series Connectors<\/p><\/div>\n<p>This design\u00a0introduces the switch to <a href=\"http:\/\/www.jst-mfg.com\/product\/pdf\/eng\/ePA-F.pdf\">JST-PA<\/a> series connectors for HydroBot modules. These connectors, although somewhat bigger and more expensive than the JST-ZH connectors used previously, will allow for lower gauge wiring and much higher currents than before. The new\u00a0connectors support 22-28 gauge wiring and up to 3A per pin. All new module designs going forward will use JST-PA connectors and existing modules will be updated as part of the next revision cycle. The first module that has been updated to include the new connectors is the <a href=\"http:\/\/protofusion.org\/wordpress\/2016\/07\/hydrobot-measuring-atmospheric-conditions\/\">AirSense<\/a>\u00a0module, which has also added\u00a0a light sensing feature. Other HydroHub features to note include a constant current driver for the power indication LED to keep brightness consistent over the entire input voltage range, and a CAN bus termination resistor that can be selected using a simple jumper to accommodate the needs of various network topologies.<\/p>\n<p>All source can be found in the <a href=\"http:\/\/hg.protofusion.org\/HydroBot\/hydrohub-hardware\">HydroBot repository<\/a>. The BOM and generated gerber files are also included for easy replication.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>HydroHub is a HydroBot module designed to connect together HydroBot modules in a star topology. The hub provides power and CAN connectivity to a total of\u00a0eight channels. It has a DC barrel jack for connecting an external power supply, as<span class=\"ellipsis\">&hellip;<\/span><\/p>\n<div class=\"read-more\"><a href=\"http:\/\/protofusion.org\/wordpress\/2017\/02\/hydrobot-connecting-the-modules\/\">Read more &#8250;<\/a><\/div>\n<p><!-- end of .read-more --><\/p>\n","protected":false},"author":10,"featured_media":2617,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_kadence_starter_templates_imported_post":false,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[282,35],"tags":[39,114,281,280,185,115,263,264],"class_list":["post-2595","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-hydrobot","category-projects","tag-diy","tag-growing","tag-hydrobot","tag-hydroponics","tag-open-source-hardware","tag-plants","tag-stm32","tag-stm32f0"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"http:\/\/protofusion.org\/wordpress\/wp-content\/uploads\/2017\/02\/HydroHub.jpg","jetpack_shortlink":"https:\/\/wp.me\/pNjAs-FR","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"http:\/\/protofusion.org\/wordpress\/wp-json\/wp\/v2\/posts\/2595","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/protofusion.org\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/protofusion.org\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/protofusion.org\/wordpress\/wp-json\/wp\/v2\/users\/10"}],"replies":[{"embeddable":true,"href":"http:\/\/protofusion.org\/wordpress\/wp-json\/wp\/v2\/comments?post=2595"}],"version-history":[{"count":15,"href":"http:\/\/protofusion.org\/wordpress\/wp-json\/wp\/v2\/posts\/2595\/revisions"}],"predecessor-version":[{"id":3561,"href":"http:\/\/protofusion.org\/wordpress\/wp-json\/wp\/v2\/posts\/2595\/revisions\/3561"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/protofusion.org\/wordpress\/wp-json\/wp\/v2\/media\/2617"}],"wp:attachment":[{"href":"http:\/\/protofusion.org\/wordpress\/wp-json\/wp\/v2\/media?parent=2595"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/protofusion.org\/wordpress\/wp-json\/wp\/v2\/categories?post=2595"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/protofusion.org\/wordpress\/wp-json\/wp\/v2\/tags?post=2595"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}