{"id":2170,"date":"2012-08-27T17:01:42","date_gmt":"2012-08-28T00:01:42","guid":{"rendered":"http:\/\/www.serialporttool.com\/sptblog\/?p=2170"},"modified":"2012-08-27T17:01:42","modified_gmt":"2012-08-28T00:01:42","slug":"control-velleman-k8090-usb-relay-card-with-comm-operator","status":"publish","type":"post","link":"https:\/\/www.serialporttool.com\/GK\/2012\/08\/control-velleman-k8090-usb-relay-card-with-comm-operator\/","title":{"rendered":"Control Velleman K8090 USB Relay Card with Comm Operator"},"content":{"rendered":"<p><a href=\"http:\/\/www.serialporttool.com\/CommOpInfo.htm\" target=\"_blank\" rel=\"noopener noreferrer\">Comm Operator<\/a> is a professional tool for RS232 serial port and network communication. It&#8217;s your good helper to design, development, debug and test applications and hardware devices.<br \/>\nHere we list an application sample about how to control Velleman <a href=\"https:\/\/www.vellemanstore.com\/en\/velleman-k8090-8-channel-usb-relay-card-kit\">K8090 <\/a>\/VM8090 USB relay card with Comm Operator.<\/p>\n<p>Connect Velleman K8090\/VM8090 USB relay card with your computer.<\/p>\n<p align=\"center\"><a href=\"http:\/\/www.serialporttool.com\/sptblog\/wp-content\/uploads\/2012\/08\/off.jpg\"><img loading=\"lazy\" decoding=\"async\" style=\"background-image: none; padding-left: 0px; padding-right: 0px; display: inline; padding-top: 0px; border-width: 0px;\" title=\"Velleman K8090 USB relay card \" src=\"http:\/\/www.serialporttool.com\/sptblog\/wp-content\/uploads\/2012\/08\/off_thumb.jpg\" alt=\"Velleman K8090 USB relay card \" width=\"240\" height=\"180\" border=\"0\" \/><\/a><\/p>\n<p>Run Comm Operator.<\/p>\n<p>Open <strong>Com Port<\/strong> connected with Velleman K8090\/VM8090 USB relay card, and select <strong>Baud Rate 19200<\/strong>.<\/p>\n<p><a href=\"http:\/\/www.serialporttool.com\/sptblog\/wp-content\/uploads\/2012\/08\/SNAGHTML3b44684.png\"><img loading=\"lazy\" decoding=\"async\" style=\"background-image: none; padding-left: 0px; padding-right: 0px; display: block; float: none; margin-left: auto; margin-right: auto; padding-top: 0px; border-width: 0px;\" title=\"Comm Operator connects with Velleman K8090\" src=\"http:\/\/www.serialporttool.com\/sptblog\/wp-content\/uploads\/2012\/08\/SNAGHTML3b44684_thumb.png\" alt=\"Comm Operator connects with Velleman K8090\" width=\"504\" height=\"433\" border=\"0\" \/><\/a><\/p>\n<p>Click menu <em><strong>Tools-&gt;Option-&gt;Checksum<\/strong><\/em> to select checksum method \u201c0x100 \u2013 (Z1+Z2+Z3+\u2026+Zn)\u201d .<\/p>\n<p><a href=\"http:\/\/www.serialporttool.com\/sptblog\/wp-content\/uploads\/2012\/08\/image7.png\"><img loading=\"lazy\" decoding=\"async\" style=\"background-image: none; padding-left: 0px; padding-right: 0px; display: block; float: none; margin-left: auto; margin-right: auto; padding-top: 0px; border-width: 0px;\" title=\"Comm Operator - select checksum method\" src=\"http:\/\/www.serialporttool.com\/sptblog\/wp-content\/uploads\/2012\/08\/image_thumb7.png\" alt=\"Comm Operator - select checksum method\" width=\"504\" height=\"224\" border=\"0\" \/><\/a><\/p>\n<p>Click menu<strong><em> View \u2013&gt; Structured Data<\/em><\/strong> to show Quick Send \u2013 Structured Data panel.<\/p>\n<p align=\"center\"><a href=\"http:\/\/www.serialporttool.com\/sptblog\/wp-content\/uploads\/2012\/08\/image8.png\"><img loading=\"lazy\" decoding=\"async\" style=\"background-image: none; padding-left: 0px; padding-right: 0px; display: inline; padding-top: 0px; border-width: 0px;\" title=\"Comm Operator - Open Structured Data panel\" src=\"http:\/\/www.serialporttool.com\/sptblog\/wp-content\/uploads\/2012\/08\/image_thumb8.png\" alt=\"Comm Operator - Open Structured Data panel\" width=\"504\" height=\"216\" border=\"0\" \/><\/a><\/p>\n<p align=\"left\">Click <strong>Edit<\/strong> button to add <strong>New<\/strong> data items for STX, CMD, MASK, PARAM1, PARAM2 and ETX; add <strong>New Var<\/strong> for checksum according to the Velleman K8090\/VM 8090 protocol manual.<\/p>\n<p align=\"left\"><em>\u201cPackets for the K8090 are 7 bytes in size. Each packet is delimited by the STX (04h) and ETX<br \/>\n(0Fh) bytes. Validity of the packet can be checked by verifying the checksum byte (CHK).\u201d<\/em><\/p>\n<p align=\"left\"><a href=\"http:\/\/www.serialporttool.com\/sptblog\/wp-content\/uploads\/2012\/08\/image9.png\"><img loading=\"lazy\" decoding=\"async\" style=\"background-image: none; padding-left: 0px; padding-right: 0px; display: block; float: none; margin-left: auto; margin-right: auto; padding-top: 0px; border-width: 0px;\" title=\"Velleman K8090 Packet Diagram\" src=\"http:\/\/www.serialporttool.com\/sptblog\/wp-content\/uploads\/2012\/08\/image_thumb9.png\" alt=\"Velleman K8090 Packet Diagram\" width=\"229\" height=\"153\" border=\"0\" \/><\/a><\/p>\n<p><a href=\"http:\/\/www.serialporttool.com\/sptblog\/wp-content\/uploads\/2012\/08\/SNAGHTML3d51854.png\"><img loading=\"lazy\" decoding=\"async\" style=\"background-image: none; padding-left: 0px; padding-right: 0px; display: block; float: none; margin-left: auto; margin-right: auto; padding-top: 0px; border-width: 0px;\" title=\"Comm Operator - Create Structured Data\" src=\"http:\/\/www.serialporttool.com\/sptblog\/wp-content\/uploads\/2012\/08\/SNAGHTML3d51854_thumb.png\" alt=\"Comm Operator - Create Structured Data\" width=\"504\" height=\"225\" border=\"0\" \/><\/a><\/p>\n<p><em>\u201cThe K8090 uses the two&#8217;s complement for its checksum. This means adding all bytes up to and<br \/>\nincluding param2, negating the result and adding 1. \u201c<\/em><\/p>\n<p align=\"center\">-(STX + CMD + MASK + PARAM1 + PARAM2) + 1<\/p>\n<p align=\"center\"><a href=\"http:\/\/www.serialporttool.com\/sptblog\/wp-content\/uploads\/2012\/08\/SNAGHTML3d73e6a.png\"><img loading=\"lazy\" decoding=\"async\" style=\"background-image: none; padding-left: 0px; padding-right: 0px; display: inline; padding-top: 0px; border-width: 0px;\" title=\"Comm Operator - Create Structured Data checksum\" src=\"http:\/\/www.serialporttool.com\/sptblog\/wp-content\/uploads\/2012\/08\/SNAGHTML3d73e6a_thumb.png\" alt=\"Comm Operator - Create Structured Data checksum\" width=\"504\" height=\"333\" border=\"0\" \/><\/a><\/p>\n<p>Here is the added structured data.<\/p>\n<p><a href=\"http:\/\/www.serialporttool.com\/sptblog\/wp-content\/uploads\/2012\/08\/SNAGHTML3d90052.png\"><img loading=\"lazy\" decoding=\"async\" style=\"background-image: none; padding-left: 0px; padding-right: 0px; display: block; float: none; margin-left: auto; margin-right: auto; padding-top: 0px; border-width: 0px;\" title=\"Comm Operator - Structured Data\" src=\"http:\/\/www.serialporttool.com\/sptblog\/wp-content\/uploads\/2012\/08\/SNAGHTML3d90052_thumb.png\" alt=\"Comm Operator - Structured Data\" width=\"504\" height=\"303\" border=\"0\" \/><\/a><\/p>\n<p>Click Send button to send data packet to Velleman K8090 USB relay card.<\/p>\n<p>The sample packet is to switch all 8 relays on.<\/p>\n<p><a href=\"http:\/\/www.serialporttool.com\/sptblog\/wp-content\/uploads\/2012\/08\/SNAGHTML3e61365.png\"><img loading=\"lazy\" decoding=\"async\" style=\"background-image: none; padding-left: 0px; padding-right: 0px; display: block; float: none; margin-left: auto; margin-right: auto; padding-top: 0px; border-width: 0px;\" title=\"Control Velleman K8090 USB relay card with Comm Operator\" src=\"http:\/\/www.serialporttool.com\/sptblog\/wp-content\/uploads\/2012\/08\/SNAGHTML3e61365_thumb.png\" alt=\"Control Velleman K8090 USB relay card with Comm Operator\" width=\"504\" height=\"295\" border=\"0\" \/><\/a><\/p>\n<p>Edit data items according to the Velleman K8090\/VM8090 protocol manual, it\u2019s easy to control the relay card.<\/p>\n<p>Here is the video about how to control Velleman K8090 USB relay card with Comm Operator.<\/p>\n<p><iframe loading=\"lazy\" title=\"Control Velleman K8090\/VM8090 USB Relay Card with Comm Operator\" width=\"785\" height=\"442\" src=\"https:\/\/www.youtube.com\/embed\/Cjq08UCl1SM?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen><\/iframe><\/p>\n<div id=\"scid:5737277B-5D6D-4f48-ABFC-DD9C333F4C5D:e3ccb792-a463-473e-a425-2b3b47540cee\" class=\"wlWriterEditableSmartContent\" style=\"width: 448px; display: block; float: none; margin-left: auto; margin-right: auto; padding: 0px;\">\n<div><\/div>\n<div style=\"width: 448px; clear: both; font-size: .8em;\">Control Velleman K8090 USB relay card with Comm Operator<\/div>\n<\/div>\n<p>See also:<\/p>\n<p><a href=\"https:\/\/www.vellemanstore.com\/en\/velleman-vm8090-eight-channel-usb-relay-card\">Vellman VM8090<\/a>\u00a0\u00a0\u00a0 <a href=\"https:\/\/www.vellemanstore.com\/en\/velleman-k8090-8-channel-usb-relay-card-kit\">Velleman K8090<\/a><\/p>\n<p><a href=\"http:\/\/www.serialporttool.com\/sptblog\/?p=4097\" target=\"_blank\" rel=\"noopener noreferrer\">Relay Timer R8X Supports Robot Electronics\u2019 Relay Board<\/a><\/p>\n<p><a href=\"http:\/\/www.serialporttool.com\/sptblog\/?p=4132\" target=\"_blank\" rel=\"noopener noreferrer\">Quick Timer R8X Supports Velleman K8090\/VM8090 Relay Card<\/a><\/p>\n<p><a class=\"row-title\" title=\"Edit \u201cControl K8090\/VM8090 USB Relay Card with N-Button Pro\u201d\" href=\"http:\/\/www.serialporttool.com\/sptblog\/?p=2324\" target=\"_blank\" rel=\"noopener noreferrer\">Control K8090\/VM8090 USB Relay Card with N-Button Pro<\/a><\/p>\n<p><a href=\"http:\/\/www.serialporttool.com\/CommOpInfo.htm\" target=\"_blank\" rel=\"noopener noreferrer\">Comm Operator homepage<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Comm Operator is a professional tool for RS232 serial port and network communication. It&#8217;s your good helper to design, development, debug and test applications and hardware devices. Here we list an application sample about how to control Velleman K8090 \/VM8090 [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[29,155,156],"class_list":["post-2170","post","type-post","status-publish","format-standard","hentry","category-commop","tag-comm-operator","tag-structured-data","tag-velleman-k8090-usb-relay-card"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Control Velleman K8090 USB Relay Card with Comm Operator - Serial Port Tool<\/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:\/\/www.serialporttool.com\/GK\/2012\/08\/control-velleman-k8090-usb-relay-card-with-comm-operator\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Control Velleman K8090 USB Relay Card with Comm Operator - Serial Port Tool\" \/>\n<meta property=\"og:description\" content=\"Comm Operator is a professional tool for RS232 serial port and network communication. 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It&#8217;s your good helper to design, development, debug and test applications and hardware devices. 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