This note applies only to the Progressive Web App (PWA) version, accessed via URL, of Graphical Analysis running on a Chromebook. It does not apply to the Chrome Packaged App version installed from the Chrome Web Store. <\/p>\n
Problem: Some older Chromebooks cannot communicate with Go! devices when using the PWA form of Graphical Analysis. <\/p>\n
Chromebooks use a version of a Linux operating system kernel that manages connections to external devices such as sensor. One older version of the kernel requires that Graphical Analysis make special accommodation to function; Graphical Analysis can do that when it is installed as a Chrome Web App. However, when run as a PWA, this special accommodation is not possible, so USB communication to Go! devices will fail.<\/p>\n
Determine the version of the linux kernel on your Chromebook by browsing to chrome:\/\/system<\/a>. Search for uname<\/em>. If the version is 3.X then Go! devices will not work in the PWA. If it is 4.0 or newer, then Graphical Analysis will be able to work with these sensors.<\/p>\n Workarounds: If no update is available, there is no workaround for that particular Chromebook. Chromebooks with the version 3 kernel will be past or close to the end of their support period as of 2022. <\/p>\n Note that Chromebooks have a design-limited life span in that updates to Chrome OS cease after a predetermined time relative to that model\u2019s introduction<\/em> date, not the purchase date. That duration can range from 5 to 8 years for Chromebooks generally available for purchase. If you purchase a model of Chromebook that was first introduced years ago, the duration will be shorter than 5 to 8 years. Google documentation refers to this date as the \u201cAuto Update Expiration (AUE)<\/a>\u201d. Knowing the AUE of a Chromebook is a key purchase consideration<\/em>, since a Chromebook with an AUE only a few years away will be quickly obsolete.<\/p>\n What is the difference between a Progressive Web App and an installed version of Graphical Analysis and other Vernier apps?<\/a> This note applies only to the Progressive Web App (PWA) version, accessed via URL, of Graphical Analysis running on a Chromebook. It does not apply…<\/p>\n","protected":false},"author":8976,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[],"tags":[],"class_list":["post-15281","post","type-post","status-publish","format-standard","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/posts\/15281","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/users\/8976"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/comments?post=15281"}],"version-history":[{"count":0,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/posts\/15281\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/media?parent=15281"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/categories?post=15281"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/tags?post=15281"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
Use a different Chromebook with an up-to-date kernel.
Update the Chromebook kernel.<\/p>\n
Original SpectroVis does not work with Chromebooks with kernel older than 4.4.<\/a><\/p>","protected":false},"excerpt":{"rendered":"