{"id":19,"date":"2008-04-14T11:37:48","date_gmt":"2008-04-14T01:37:48","guid":{"rendered":"http:\/\/www.svsunnyspells.com\/?p=19"},"modified":"2008-06-20T07:38:30","modified_gmt":"2008-06-19T21:38:30","slug":"getting-seatalk-navbus-and-nmea-to-talk","status":"publish","type":"post","link":"https:\/\/svsunnyspells.com\/?p=19","title":{"rendered":"Getting Seatalk, Navbus and NMEA to talk&#8230;"},"content":{"rendered":"<div>\n<p>Here&#8217;s a mystery&#8230;<\/p>\n<p>The <a href=\"http:\/\/www.svsunnyspells.com\/about\/navigation-systems\" target=\"\u201d_blank\u201d\"><\/a>navigation electronics on Sunny Spells is a mix of Navman and Raymarine equipment. Navman has its own, proprietary communication protocol called \u2018NAVBUS\u2019. The Raymarine equipment uses \u2018SeaTalk\u2019. On top of this, there is the AIS receiver which transmits data in NMEA0183, but at 38,400bps (bits per second), while most NMEA equipment communicate at the slower data rate of 4,800bps. Sounds like a nightmare to get them all to talk?<\/p>\n<p>Yes and no\u2026<\/p>\n<p>The core of the communications backbone is the <a href=\"http:\/\/brookhouseonline.com\/nmeamux.htm\" target=\"_blank\">Brookhouse multiplexer (MUX) with SeaTalk and AIS options and USB output<\/a>. When I installed the MUX, I wasn\u2019t expecting immediate success; imagine my delight when the whole system aapeared to work straight out of the box \u2013 no modification required!<\/p>\n<p>However, I have started playing around on the chartplotter, and all is not as it seemed\u2026<\/p>\n<p>The <em>data from the wind instrument<\/em> is not available on the plotter or the Repeat 3100 (both on Navbus). I\u2019m assuming it\u2019s a Seatalk to NMEA conversion issue, but I haven\u2019t been able to investigate as I can\u2019t get the laptop connected. Unfortunately I seem to have mislaid the CD with the USB-Serial driver for the Mux, so I can\u2019t get the laptop connection sorted \u2013 aaargh! I\u2019d love to have the wind info on the plotter (which is at the helm) as the crew are forever blocking my view of the wind instrument!<\/p>\n<\/div>\n<p>[ad]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Here&#8217;s a mystery&#8230; The navigation electronics on Sunny Spells is a mix of Navman and Raymarine equipment. Navman has its own, proprietary communication protocol called \u2018NAVBUS\u2019. The Raymarine equipment uses \u2018SeaTalk\u2019. On top of this, there is the AIS receiver &hellip; <a href=\"https:\/\/svsunnyspells.com\/?p=19\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":59,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"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":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[4,19],"tags":[38,39,40,32,20,131,36,37,17,34,35,23,30,21,33,31,25,8,22],"class_list":["post-19","post","type-post","status-publish","format-standard","hentry","category-about-sunny-spells","category-electronics","tag-38","tag-39","tag-ais","tag-brookhouse","tag-chartplotter","tag-electronics","tag-m121","tag-m84","tag-marine","tag-multiplexer","tag-mux","tag-navbus","tag-navman","tag-nmea","tag-nmea0183","tag-northstar","tag-raymarine","tag-sailing","tag-seatalk"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/pgewA-j","_links":{"self":[{"href":"https:\/\/svsunnyspells.com\/index.php?rest_route=\/wp\/v2\/posts\/19","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/svsunnyspells.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/svsunnyspells.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/svsunnyspells.com\/index.php?rest_route=\/wp\/v2\/users\/59"}],"replies":[{"embeddable":true,"href":"https:\/\/svsunnyspells.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=19"}],"version-history":[{"count":0,"href":"https:\/\/svsunnyspells.com\/index.php?rest_route=\/wp\/v2\/posts\/19\/revisions"}],"wp:attachment":[{"href":"https:\/\/svsunnyspells.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=19"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/svsunnyspells.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=19"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/svsunnyspells.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=19"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}