{"id":6217,"date":"2023-12-08T07:00:57","date_gmt":"2023-12-08T12:00:57","guid":{"rendered":"https:\/\/www.summet.com\/blog\/?p=6217"},"modified":"2024-01-04T21:43:45","modified_gmt":"2024-01-05T02:43:45","slug":"dwarf-2-bug-incorrectly-supports-bidirectional-charging-in-out-ports-suck-power-out-of-the-dwarf","status":"publish","type":"post","link":"https:\/\/www.summet.com\/blog\/2023\/12\/08\/dwarf-2-bug-incorrectly-supports-bidirectional-charging-in-out-ports-suck-power-out-of-the-dwarf\/","title":{"rendered":"Dwarf 2 BUG &#8211; Incorrectly supports bidirectional charging (In\/Out ports suck power OUT of the Dwarf)"},"content":{"rendered":"<div dir=\"auto\">\n<p><iframe loading=\"lazy\" title=\"YouTube video player\" src=\"https:\/\/www.youtube-nocookie.com\/embed\/Zr4WGj41DEQ?si=nlGuc1PvJVkfCYGr\" width=\"560\" height=\"315\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/p>\n<div><strong>Update<\/strong>: Firmware 2.0.04 appears to fix this issue.<\/div>\n<div class=\"xdj266r x11i5rnm xat24cr x1mh8g0r x1vvkbs x126k92a\">Last night I ran into an issue where my Dwarf 2 smart telescope was stacking images (running the beta software in 1&#215;1 binning mode, so requiring a lot of CPU power) and as soon as I plugged in a USB powerbank, the Dwarf would freeze up and need to be rebooted.<\/div>\n<div dir=\"auto\"><\/div>\n<\/div>\n<div class=\"x11i5rnm xat24cr x1mh8g0r x1vvkbs xtlvy1s x126k92a\">\n<div dir=\"auto\">I finally figured out that my powerbank was sucking power OUT of the dwarf, and combined with the load from the CPU doing stacking, this was causing a low voltage situation that caused the Dwarf to crash.<\/div>\n<div dir=\"auto\"><\/div>\n<\/div>\n<div class=\"x11i5rnm xat24cr x1mh8g0r x1vvkbs xtlvy1s x126k92a\">\n<div dir=\"auto\">\n<p>It appears that the USB-C PD chip in the Dwarf is incorrectly programmed to allow power to flow OUT of the dwarf via bi-directional charging. I confirmed this with a USB power meter. This only happens with USB-C PD powerbanks that have &#8220;in and out&#8221; ports, which can be used to either charge a device OR charge the powerbank, depending upon if the other end is a source or sync of power.<\/p>\n<p>It appears that when turned on, the Dwarf2 advertises the ability to export power, and does so. Workaround: If you plug the powerbank into the Dwarf when it is turned off, the power flows in the correct direction (from the powerbank TO the Dwarf). Even after you turn the dwarf on, this direction remains correct, so it appears to be necessary to plug in the dwarf before you turn it on. I&#8217;ve seen this behavior before testing the Beta firmware and App, but I confirmed it most recently with firmware version 2.0.03 and App 2.0.0 B665.<\/p>\n<\/div>\n<\/div>\n<div class=\"x11i5rnm xat24cr x1mh8g0r x1vvkbs xtlvy1s x126k92a\">\n<div dir=\"auto\">Video demonstrating the problem:<\/div>\n<div dir=\"auto\"><a class=\"x1i10hfl xjbqb8w x6umtig x1b1mbwd xaqea5y xav7gou x9f619 x1ypdohk xt0psk2 xe8uvvx xdj266r x11i5rnm xat24cr x1mh8g0r xexx8yu x4uap5 x18d9i69 xkhd6sd x16tdsg8 x1hl2dhg xggy1nq x1a2a7pz xt0b8zv x1fey0fg\" role=\"link\" href=\"https:\/\/www.youtube.com\/watch?v=Zr4WGj41DEQ\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/www.youtube.com\/watch?v=Zr4WGj41DEQ<\/a><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Update: Firmware 2.0.04 appears to fix this issue. Last night I ran into an issue where my Dwarf 2 smart telescope was stacking images (running the beta software in 1&#215;1 binning mode, so requiring a lot of CPU power) and &hellip; <a href=\"https:\/\/www.summet.com\/blog\/2023\/12\/08\/dwarf-2-bug-incorrectly-supports-bidirectional-charging-in-out-ports-suck-power-out-of-the-dwarf\/\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8,6],"tags":[153,149],"class_list":["post-6217","post","type-post","status-publish","format-standard","hentry","category-commentary","category-reviews","tag-dwarf2","tag-dwarfii"],"_links":{"self":[{"href":"https:\/\/www.summet.com\/blog\/wp-json\/wp\/v2\/posts\/6217","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.summet.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.summet.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.summet.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.summet.com\/blog\/wp-json\/wp\/v2\/comments?post=6217"}],"version-history":[{"count":2,"href":"https:\/\/www.summet.com\/blog\/wp-json\/wp\/v2\/posts\/6217\/revisions"}],"predecessor-version":[{"id":6222,"href":"https:\/\/www.summet.com\/blog\/wp-json\/wp\/v2\/posts\/6217\/revisions\/6222"}],"wp:attachment":[{"href":"https:\/\/www.summet.com\/blog\/wp-json\/wp\/v2\/media?parent=6217"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.summet.com\/blog\/wp-json\/wp\/v2\/categories?post=6217"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.summet.com\/blog\/wp-json\/wp\/v2\/tags?post=6217"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}