{"id":431,"date":"2019-09-09T21:37:26","date_gmt":"2019-09-10T01:37:26","guid":{"rendered":"http:\/\/dc540.org\/xxx\/?p=431"},"modified":"2019-09-10T10:12:49","modified_gmt":"2019-09-10T14:12:49","slug":"success","status":"publish","type":"post","link":"https:\/\/dc540.org\/xxx\/2019\/09\/success\/","title":{"rendered":"Success!"},"content":{"rendered":"\n

I emailed Waveshare indicating my problem getting anything to display on the 2.13in epaper. They were VERY quick to get back to me, and suggested I try running the tests for another size, the 1.54in model, just to see what it did.<\/p>\n\n\n\n

Turns out, that worked. So I started looking closer…<\/p>\n\n\n\n

drwxr-xr-x 2 root root 4096 Sep 10 00:11 .
\ndrwxr-xr-x 5 root root 4096 Sep 10 00:11 ..
\n-rw-r–r– 1 root root 2801 Sep 10 00:11 epd_1in54b_test.py
\n-rw-r–r– 1 root root 2657 Sep 10 00:11 epd_1in54c_test.py
\n-rw-r–r– 1 root root 2976 Sep 10 00:11 epd_1in54_test.py
\n-rw-r–r– 1 root root 2969 Sep 10 00:11 epd_1in54_V2_test.py
\n-rw-r–r– 1 root root 3756 Sep 10 00:11 epd_2in13bc_test.py
\n-rw-r–r– 1 root root 3020 Sep 10 00:11 epd_2in13d_test.py
\n-rw-r–r– 1 root root 3026 Sep 10 00:11 epd_2in13_test.py
\n-rw-r–r– 1 root root 3097 Sep 10 00:11 epd_2in13_V2_test.py
\n-rw-r–r– 1 root root 4006 Sep 10 00:11 epd_2in7b_test.py
\n-rw-r–r– 1 root root 3017 Sep 10 00:11 epd_2in7_test.py
\n-rw-r–r– 1 root root 3851 Sep 10 00:11 epd_2in9bc_test.py
\n-rw-r–r– 1 root root 3760 Sep 10 00:11 epd_2in9d_test.py
\n-rw-r–r– 1 root root 3822 Sep 10 00:11 epd_2in9_test.py
\n-rw-r–r– 1 root root 3981 Sep 10 00:11 epd_4in2bc_test.py
\n-rw-r–r– 1 root root 3147 Sep 10 00:11 epd_4in2_test.py
\n-rw-r–r– 1 root root 3859 Sep 10 00:11 epd_5in83bc_test.py
\n-rw-r–r– 1 root root 3154 Sep 10 00:11 epd_5in83_test.py
\n-rw-r–r– 1 root root 3981 Sep 10 00:11 epd_7in5bc_test.py
\n-rw-r–r– 1 root root 3147 Sep 10 00:11 epd_7in5_test.py<\/p>\n\n\n\n

I had been using epd_2.3_test and the epd_2.3_V2 test, neither of which worked. After seeing it function properly on a couple of the 1in54 tests, I went through them all systematically. Turns out both epd_2in13bc_test and epd_2in13d_test work.<\/p>\n\n\n\n

So I generated some red and black bitmaps, and using the example code as a template, pulled them in and displayed them.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

What I love about epaper is that it doesn’t require power to display, only to change the display.<\/p>\n\n\n\n

Now I’m looking at a 1500mah RPiZeroW-sized LiPo. I have other battery banks, but I like the idea of a low profile unit that can fit in a small pocket and maybe even be enclosed with the assembly. I was looking at this one…<\/p>\n\n\n\n

https:\/\/www.amazon.com\/gp\/product\/B07Q2C6B5H?pf_rd_p=183f5289-9dc0-416f-942e-e8f213ef368b&pf_rd_r=8CNZ36Q9MAZKK3C3J5T4<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

I emailed Waveshare indicating my problem getting anything to display on the 2.13in epaper. They were VERY quick to get back to me, and suggested I try running the tests … <\/p>\n

Continue reading “Success!”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[5],"tags":[],"class_list":["post-431","post","type-post","status-publish","format-standard","hentry","category-hardware"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_likes_enabled":true,"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/dc540.org\/xxx\/wp-json\/wp\/v2\/posts\/431","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dc540.org\/xxx\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dc540.org\/xxx\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dc540.org\/xxx\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dc540.org\/xxx\/wp-json\/wp\/v2\/comments?post=431"}],"version-history":[{"count":1,"href":"https:\/\/dc540.org\/xxx\/wp-json\/wp\/v2\/posts\/431\/revisions"}],"predecessor-version":[{"id":433,"href":"https:\/\/dc540.org\/xxx\/wp-json\/wp\/v2\/posts\/431\/revisions\/433"}],"wp:attachment":[{"href":"https:\/\/dc540.org\/xxx\/wp-json\/wp\/v2\/media?parent=431"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dc540.org\/xxx\/wp-json\/wp\/v2\/categories?post=431"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dc540.org\/xxx\/wp-json\/wp\/v2\/tags?post=431"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}