{"id":5094,"date":"2013-01-26T08:03:31","date_gmt":"2013-01-26T08:03:31","guid":{"rendered":"http:\/\/zerokidz.com\/ideas\/?p=5094"},"modified":"2014-06-24T13:36:50","modified_gmt":"2014-06-24T17:36:50","slug":"raspberry-pi-rtty-beacon-and-streaming-webcam-success","status":"publish","type":"post","link":"https:\/\/reactivemusic.net\/?p=5094","title":{"rendered":"Raspberry-Pi RTTY beacon and streaming webcam &#8211; success"},"content":{"rendered":"<p>Update: 5\/2014<\/p>\n<p>Retrying this experiment using the Arduino circuit described here:\u00a0<a href=\"https:\/\/reactivemusic.net\/?p=12161\">https:\/\/reactivemusic.net\/?p=12161<\/a><\/p>\n<p><a href=\"https:\/\/reactivemusic.net\/wp-content\/uploads\/2013\/01\/Screen-Shot-2014-05-24-at-1.52.44-AM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-12183\" title=\"Screen Shot 2014-05-24 at 1.52.44 AM\" src=\"https:\/\/reactivemusic.net\/wp-content\/uploads\/2013\/01\/Screen-Shot-2014-05-24-at-1.52.44-AM-300x163.png\" alt=\"\" width=\"300\" height=\"163\" srcset=\"https:\/\/reactivemusic.net\/wp-content\/uploads\/2013\/01\/Screen-Shot-2014-05-24-at-1.52.44-AM-300x163.png 300w, https:\/\/reactivemusic.net\/wp-content\/uploads\/2013\/01\/Screen-Shot-2014-05-24-at-1.52.44-AM-1024x559.png 1024w, https:\/\/reactivemusic.net\/wp-content\/uploads\/2013\/01\/Screen-Shot-2014-05-24-at-1.52.44-AM.png 1808w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<h5>notes<\/h5>\n<ul>\n<li>300 baud<\/li>\n<li>300 Hz carrier shift<\/li>\n<li>8 bits<\/li>\n<li>2 stop<\/li>\n<li>no parity<\/li>\n<li>filter at 300 Hz<\/li>\n<li>Normal mode (not reverse)<\/li>\n<li>AFC on<\/li>\n<\/ul>\n<div><span style=\"line-height: 22px;\">There are 2 programs:<\/span><\/div>\n<div><\/div>\n<div>\n<ul>\n<li><span style=\"line-height: 14px;\">serial.c &#8211; sends a beacon then transmits a 640&#215;480 picture<\/span><\/li>\n<li><span style=\"line-height: 14px;\">serial-beacon.c &#8211; just sends a beacon<\/span><\/li>\n<\/ul>\n<div>In order to view the picture as it comes in in dl-fldigi, you need to open up the SSDV RX window in the View menu.<\/div>\n<\/div>\n<div><\/div>\n<div>The frequency is not very stable and occasionally you need to just restart dl-fldigi because the screen fills with trash characters.<\/div>\n<div><\/div>\n<div>Also, in Max, you need to tune on the right half of the picture.<\/div>\n<div><\/div>\n<div>&#8212;<\/div>\n<div><\/div>\n<div>Will be setting up a test with smaller photos<\/div>\n<p>&nbsp;<\/p>\n<p>Success: Got an accurate beacon at 300 baud today and send a jpeg picture file , taken by a webcam connected to the R-Pi using fswebcam and SSDV.<\/p>\n<p><a href=\"http:\/\/www.slblabs.com\/2012\/09\/26\/rpi-webcam-stream\/\">http:\/\/www.slblabs.com\/2012\/09\/26\/rpi-webcam-stream\/<\/a><\/p>\n<p>Used the same circuit as the previous post about the Arduino RTTY beacon.<\/p>\n<p>The difference is that we&#8217;re using a C program to write the text directly to the serial port which modulates the NTX2 transmit frequency.<\/p>\n<p>Transmission can be stopped and started using the sleep() function but the timing is not exact.<\/p>\n<h4>Local code<\/h4>\n<p>tkzic\/rpi\/serial\/serial1 &#8211;<\/p>\n<ul>\n<li><span style=\"line-height: 1.6;\">using command line SSDV converter in tkzic\/rpi\/ssdv-master.<\/span><\/li>\n<li><span style=\"line-height: 1.6;\">Using dl-fldigi to decode RTTY and SSDV pictures.<\/span><\/li>\n<li><span style=\"line-height: 1.6;\">Using logictech c210 webcam &#8211; see link above for how to take a picture and save to file use fswebcam.<\/span><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>[Todo:]<\/p>\n<ul>\n<li>Set up a shell script to take pictures and transmit regular intervals.<\/li>\n<li>upload code and photos<\/li>\n<li>Build some antennas<\/li>\n<li>Field test<\/li>\n<li>Buy a balloon<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Update: 5\/2014 Retrying this experiment using the Arduino circuit described here:\u00a0https:\/\/reactivemusic.net\/?p=12161 notes 300 baud 300 Hz carrier shift 8 bits 2 stop no parity filter at 300 Hz Normal mode (not reverse) AFC on There are 2 programs: serial.c &#8211; sends a beacon then transmits a 640&#215;480 picture serial-beacon.c &#8211; just sends a beacon In &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/reactivemusic.net\/?p=5094\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Raspberry-Pi RTTY beacon and streaming webcam &#8211; success&#8221;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":"","footnotes":""},"categories":[143],"tags":[191,6,296,190,57,172],"class_list":["post-5094","post","type-post","status-publish","format-standard","hentry","category-interactive-media-art","tag-favorites","tag-interactive-media","tag-notebook","tag-portfolio","tag-radio","tag-raspberry-pi"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Raspberry-Pi RTTY beacon and streaming webcam - success - reactive music<\/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:\/\/reactivemusic.net\/?p=5094\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Raspberry-Pi RTTY beacon and streaming webcam - success - reactive music\" \/>\n<meta property=\"og:description\" content=\"Update: 5\/2014 Retrying this experiment using the Arduino circuit described here:\u00a0https:\/\/reactivemusic.net\/?p=12161 notes 300 baud 300 Hz carrier shift 8 bits 2 stop no parity filter at 300 Hz Normal mode (not reverse) AFC on There are 2 programs: serial.c &#8211; 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