Need to write incoming bytes from a serial port to a text file? On a Unix or Linux machine (or OSX), you can do the following:\n<\/p>\n
<\/p>\n
Open the Terminal Program (usually under \/Applications\/Utilities\/Terminal)\n<\/p>\n
Get the name of the serial port by typing ls \/dev\/tty.*<\/tt> You should get a list like this:\n<\/p>\n Make sure you know what directory you’re in. You might want to change directories to the desktop like this: cd Desktop<\/tt>\n<\/p>\n To start sending serial data into a file called datafile.txt, type screen -L (serial port name). For example, if you’re using the serial port \/dev\/tty.usbserial-A10015y4 above, you’d type: screen -L \/dev\/tty.usbserial-A10015y4<\/tt> Anything coming in the serial port will automatically get written toa file called screen.0, in the current working directory. To stop sending, type control-C.\n<\/p>\n A few suggestions to make this go smoother:<\/strong>\n<\/p>\n Send your data in ASCII rather than raw binary format. That way you can read it yourself, in addition to having a program parse it.\n<\/p>\n Consider how much data you’re writing to a file. Sending every 10 milliseconds or less will fill the file very quickly. Your maximum file size under OSX is 2 gigabytes. That’s 2 billion bytes. If you’re sending three ten-bit sensor readings, comma-delimited, with a newline and carriage return at the end:<\/p>\n That’s 16 bytes. If you’re sending that every 10 milliseconds, that’s 1600 bytes a second. That’ll take about 173.6 hours to fill 2GB. That’s about a week. <\/p>\n Inspired by Adams: Simon and Parrish. Thanks to Kate Hartman and Rob Faludi for the updates.<\/p>\n","protected":false},"excerpt":{"rendered":" Need to write incoming bytes from a serial port to a text file?<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[19],"tags":[],"class_list":["post-10","post","type-post","status-publish","format-standard","hentry","category-OSX"],"_links":{"self":[{"href":"https:\/\/www.tigoe.com\/pcomp\/code\/wp-json\/wp\/v2\/posts\/10","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.tigoe.com\/pcomp\/code\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.tigoe.com\/pcomp\/code\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.tigoe.com\/pcomp\/code\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.tigoe.com\/pcomp\/code\/wp-json\/wp\/v2\/comments?post=10"}],"version-history":[{"count":0,"href":"https:\/\/www.tigoe.com\/pcomp\/code\/wp-json\/wp\/v2\/posts\/10\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.tigoe.com\/pcomp\/code\/wp-json\/wp\/v2\/media?parent=10"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.tigoe.com\/pcomp\/code\/wp-json\/wp\/v2\/categories?post=10"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.tigoe.com\/pcomp\/code\/wp-json\/wp\/v2\/tags?post=10"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}\n\/dev\/tty.Bluetooth-Modem \/dev\/tty.Keyserial1\n\/dev\/tty.Bluetooth-PDA-Sync \/dev\/tty.usbserial-A10015y4\n<\/pre>\n
\n1023,1023,1023\\r\\n\n<\/pre>\n