{"id":2794,"date":"2026-05-21T07:59:39","date_gmt":"2026-05-21T05:59:39","guid":{"rendered":"https:\/\/www.nico-maas.de\/?p=2794"},"modified":"2026-05-21T07:59:39","modified_gmt":"2026-05-21T05:59:39","slug":"openbf511-reverse-engineering-a-omron-bf511-scale","status":"publish","type":"post","link":"https:\/\/www.nico-maas.de\/?p=2794","title":{"rendered":"[openBF511] Reverse Engineering a Omron BF511 scale"},"content":{"rendered":"<p>I actually own a Omron BF511 human scale, a nice bit of japaense kit. Its a bit old and certainly does not want to interact with the world expect for its LCD display. I wanted to change that and integrate the scale into my health apps\/do not keep on tracking stats via paper and pencil. For that reason I did a small deep dive on how to best access its data and send it back via LoRaWAN. All infos can be found on this little Github Repo: <a href=\"https:\/\/github.com\/nmaas87\/openBF511\">https:\/\/github.com\/nmaas87\/openBF511<\/a><\/p>\n<div class=\"shariff shariff-align-left shariff-widget-align-left\"><ul class=\"shariff-buttons theme-round orientation-horizontal buttonsize-small\"><li class=\"shariff-button printer shariff-nocustomcolor\" style=\"background-color:#a8a8a8\"><a href=\"javascript:window.print()\" title=\"print\" aria-label=\"print\" role=\"button\" rel=\"noopener nofollow\" class=\"shariff-link\" style=\"; background-color:#999; color:#fff\"><span class=\"shariff-icon\" style=\"\"><svg width=\"32px\" height=\"20px\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 30 32\"><path fill=\"#999\" d=\"M6.8 27.4h16v-4.6h-16v4.6zM6.8 16h16v-6.8h-2.8q-0.7 0-1.2-0.5t-0.5-1.2v-2.8h-11.4v11.4zM27.4 17.2q0-0.5-0.3-0.8t-0.8-0.4-0.8 0.4-0.3 0.8 0.3 0.8 0.8 0.3 0.8-0.3 0.3-0.8zM29.7 17.2v7.4q0 0.2-0.2 0.4t-0.4 0.2h-4v2.8q0 0.7-0.5 1.2t-1.2 0.5h-17.2q-0.7 0-1.2-0.5t-0.5-1.2v-2.8h-4q-0.2 0-0.4-0.2t-0.2-0.4v-7.4q0-1.4 1-2.4t2.4-1h1.2v-9.7q0-0.7 0.5-1.2t1.2-0.5h12q0.7 0 1.6 0.4t1.3 0.8l2.7 2.7q0.5 0.5 0.9 1.4t0.4 1.6v4.6h1.1q1.4 0 2.4 1t1 2.4z\"\/><\/svg><\/span><\/a><\/li><li class=\"shariff-button mailto shariff-nocustomcolor\" style=\"background-color:#a8a8a8\"><a href=\"mailto:?body=https%3A%2F%2Fwww.nico-maas.de%2F%3Fp%3D2794&subject=%5BopenBF511%5D%20Reverse%20Engineering%20a%20Omron%20BF511%20scale\" title=\"Send by email\" aria-label=\"Send by email\" role=\"button\" rel=\"noopener nofollow\" class=\"shariff-link\" style=\"; 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Its a bit old and certainly does not want to interact with the world expect for its LCD display. I wanted to change that and integrate the scale into my health apps\/do not keep on tracking stats via paper and pencil. &hellip; <a href=\"https:\/\/www.nico-maas.de\/?p=2794\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">[openBF511] Reverse Engineering a Omron BF511 scale<\/span> <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n<div class=\"shariff shariff-align-left shariff-widget-align-left\"><ul class=\"shariff-buttons theme-round orientation-horizontal buttonsize-small\"><li class=\"shariff-button printer shariff-nocustomcolor\" style=\"background-color:#a8a8a8\"><a href=\"javascript:window.print()\" title=\"print\" aria-label=\"print\" role=\"button\" rel=\"noopener nofollow\" class=\"shariff-link\" style=\"; background-color:#999; color:#fff\"><span class=\"shariff-icon\" style=\"\"><svg width=\"32px\" height=\"20px\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 30 32\"><path fill=\"#999\" d=\"M6.8 27.4h16v-4.6h-16v4.6zM6.8 16h16v-6.8h-2.8q-0.7 0-1.2-0.5t-0.5-1.2v-2.8h-11.4v11.4zM27.4 17.2q0-0.5-0.3-0.8t-0.8-0.4-0.8 0.4-0.3 0.8 0.3 0.8 0.8 0.3 0.8-0.3 0.3-0.8zM29.7 17.2v7.4q0 0.2-0.2 0.4t-0.4 0.2h-4v2.8q0 0.7-0.5 1.2t-1.2 0.5h-17.2q-0.7 0-1.2-0.5t-0.5-1.2v-2.8h-4q-0.2 0-0.4-0.2t-0.2-0.4v-7.4q0-1.4 1-2.4t2.4-1h1.2v-9.7q0-0.7 0.5-1.2t1.2-0.5h12q0.7 0 1.6 0.4t1.3 0.8l2.7 2.7q0.5 0.5 0.9 1.4t0.4 1.6v4.6h1.1q1.4 0 2.4 1t1 2.4z\"\/><\/svg><\/span><\/a><\/li><li class=\"shariff-button mailto shariff-nocustomcolor\" style=\"background-color:#a8a8a8\"><a href=\"mailto:?body=https%3A%2F%2Fwww.nico-maas.de%2F%3Fp%3D2794&subject=%5BopenBF511%5D%20Reverse%20Engineering%20a%20Omron%20BF511%20scale\" title=\"Send by email\" aria-label=\"Send by email\" role=\"button\" rel=\"noopener nofollow\" class=\"shariff-link\" style=\"; 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May 2022","format":false,"excerpt":"Its been a while - but good things come to those who wait ;). Trying to work out a new system you're unfamiliar with can be quite a challenge. In my case I got my first LoRaWAN concentrator along with some CubeCell HTCC-AB01\u00a0and tried to get them to work. It\u2026","rel":"","context":"In &quot;LoRaWAN&quot;","block_context":{"text":"LoRaWAN","link":"https:\/\/www.nico-maas.de\/?cat=756"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.nico-maas.de\/wordpress\/wp-content\/uploads\/bb69b3ffd44988a128f0123bd5893d0982badd6e.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.nico-maas.de\/wordpress\/wp-content\/uploads\/bb69b3ffd44988a128f0123bd5893d0982badd6e.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.nico-maas.de\/wordpress\/wp-content\/uploads\/bb69b3ffd44988a128f0123bd5893d0982badd6e.jpeg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.nico-maas.de\/wordpress\/wp-content\/uploads\/bb69b3ffd44988a128f0123bd5893d0982badd6e.jpeg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.nico-maas.de\/wordpress\/wp-content\/uploads\/bb69b3ffd44988a128f0123bd5893d0982badd6e.jpeg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.nico-maas.de\/wordpress\/wp-content\/uploads\/bb69b3ffd44988a128f0123bd5893d0982badd6e.jpeg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":2651,"url":"https:\/\/www.nico-maas.de\/?p=2651","url_meta":{"origin":2794,"position":1},"title":"Getting LoRaWAN working with STM32WL55 and Radiolib","author":"Nico Maas","date":"28. January 2024","format":false,"excerpt":"Elektor was looking for some ideas regarding their STM32 Design Contest - and so I thought, why not putting the excellent work of the guys behind the RadioLib to good use and getting this board working in LoRaWAN (and it was easier than I thought :)): https:\/\/www.elektormagazine.com\/labs\/getting-lorawan-working-with-stm32wl55-and-radiolib","rel":"","context":"In &quot;Arduino&quot;","block_context":{"text":"Arduino","link":"https:\/\/www.nico-maas.de\/?cat=344"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.nico-maas.de\/wordpress\/wp-content\/uploads\/IMG_20240128_152105001-2-1024x576.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.nico-maas.de\/wordpress\/wp-content\/uploads\/IMG_20240128_152105001-2-1024x576.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.nico-maas.de\/wordpress\/wp-content\/uploads\/IMG_20240128_152105001-2-1024x576.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.nico-maas.de\/wordpress\/wp-content\/uploads\/IMG_20240128_152105001-2-1024x576.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":2607,"url":"https:\/\/www.nico-maas.de\/?p=2607","url_meta":{"origin":2794,"position":2},"title":"RAK11300 - Getting it to work with Arduino-Pico and RadioLib!","author":"Nico Maas","date":"3. November 2023","format":false,"excerpt":"Intro About a year ago I got some RAK11300 modules - which are a nice combination of an RP2040 alongside a SX1262 radio on one module - designed a breakout board - tested it - and quickly shelved it. Reason was that this module was somewhat Arduino compliant - as\u2026","rel":"","context":"In &quot;Computer&quot;","block_context":{"text":"Computer","link":"https:\/\/www.nico-maas.de\/?cat=4"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.nico-maas.de\/wordpress\/wp-content\/uploads\/rak11300_schematic-207x300.png?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":2590,"url":"https:\/\/www.nico-maas.de\/?p=2590","url_meta":{"origin":2794,"position":3},"title":"[PiAndMore] TinyGS Presentation","author":"Nico Maas","date":"25. April 2023","format":false,"excerpt":"Here is my presentation to TinyGS @ PiAndMore 13 (University of Applied Sciences Trier, 22.04.2023) TinyGS_PiAndMore13.pdf Videorecording can be found here: tbd","rel":"","context":"In &quot;Talks&quot;","block_context":{"text":"Talks","link":"https:\/\/www.nico-maas.de\/?cat=392"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":2414,"url":"https:\/\/www.nico-maas.de\/?p=2414","url_meta":{"origin":2794,"position":4},"title":"LoRaWAN with RAKwireless RAK5146: The SX1303 in the field, a rocky start","author":"Nico Maas","date":"10. October 2021","format":false,"excerpt":"Setting the scene Working with the guys over at balena comes with some perks - including the peer pressure of getting into new technologies and trying them out. 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As with the\u2026","rel":"","context":"In &quot;Computer&quot;","block_context":{"text":"Computer","link":"https:\/\/www.nico-maas.de\/?cat=4"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.nico-maas.de\/wordpress\/wp-content\/uploads\/rak3172-300x222.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.nico-maas.de\/index.php?rest_route=\/wp\/v2\/posts\/2794","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.nico-maas.de\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.nico-maas.de\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.nico-maas.de\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.nico-maas.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2794"}],"version-history":[{"count":1,"href":"https:\/\/www.nico-maas.de\/index.php?rest_route=\/wp\/v2\/posts\/2794\/revisions"}],"predecessor-version":[{"id":2795,"href":"https:\/\/www.nico-maas.de\/index.php?rest_route=\/wp\/v2\/posts\/2794\/revisions\/2795"}],"wp:attachment":[{"href":"https:\/\/www.nico-maas.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2794"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.nico-maas.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2794"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.nico-maas.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2794"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}