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Mar 2026【隨筆】Clone a Meta Ray-ban Display glasses application｜藍芽 L2CAP CoC 極致低延遲架構優化：實現 720p 智慧眼鏡流暢串流 👓（LIVE DEMO）

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最近在做一些實驗性質的東西，記得去年短暫玩過 2023 年底上市的第二代 Ray-Ban Meta 智能眼鏡，雖然它主要還是依賴智慧型手機作為算力中心，但我們對它所使用的串流技術很感興趣，因為聽說他們是用藍芽做串流。 去年曾經有同事隨口問我：「我們的眼鏡做到跟他們一樣你覺得有可能嗎？」，因為我知道我們的硬體規格跟人家的相比並非等號，加上當時有其他事情在搞，所以隨口開玩笑回說：“可是聽說 Meta 有200個人在搞那個眼鏡捏（雖然不知道他們負責搞應用的有幾人），啊我如果一個人可以幹贏他們200人，那我還在這幹嘛？？？（笑）” 也記得更久以前，當我們還在研究那個眼鏡時，常聽到像是：『 他們不知道用了什麼黑科技 』，這類沒有建設性、不應該從 RD 嘴裡說出來的話，而我也是不以為然。坦白講，以前每次只要聽到某SW嘴砲經理（暫且以H君稱之），沒事就把『 黑科技 』三個字掛在嘴上，當做無知的遮羞布，我就會感到倒胃口！同樣身為RD，我只覺得  Shame on you！（打嘴炮、作秀搶風頭、噁心帶風向、搞政治操作、把別人做事的成果搶去幫自己抬轎、有鍋直接推給下屬扛、散佈同事私生活謠言，還有職場霸凌，這些你他媽都頂級專業戶，除此之外沒啥洨用了！） 一件理論上可以做到的事情，外行人的認知被信息差，不懂加上沒實作能力去驗證，就什麼都變成黑科技了（多黑？比巴西黑鮑魚還黑嗎？）。反重力技術說不定也非啥黑科技，只是政府不讓你普通老百姓了解罷了。 Ray-ban Meta 的黑科技，講白了就是人家拉個百人團隊在搞那支眼鏡，然後把軟體技能和硬體規格點滿，再加上極致優化後的成果罷了！ 當時知道 Ray-Ban Meta 的智慧眼鏡有塞入一個強大的 WiFi 6 晶片在裡面，一開始我猜測會不會有可能是透過 WiFi P2P 或 WiFi SoftAP 的方式去做串流（確實 Meta 的智能眼鏡，在同步媒體時，會強制要求開啟手機的 WiFi 開關，所以媒體同步應該是靠 WiFi 通道做的），而去年初我也快速做了一個WiFi Direct 架構來做 POC，確實傳輸效率非常快，幾百 MB 的大檔幾乎秒級傳完，從眼鏡端將媒體串流到手機端更是不用說的順暢，而且當時我們的媒體串流還是以未經編碼的方式傳透過 Socket 直接傳輸的（這表示傳輸時所需的頻寬會更大，功耗據說也較大）。 後來因為 ...
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FbGraph + OmniAuth + Facebook Graph API on Rails application

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OAuth is often described as a 'valet key for the web'. In the same way as a valet key gives restricted access to a car, allowing the valet to drive it but not open the trunk or glovebox, OAuth allows a client application restricted access to your data at a resource server via tokens issued by an authorization server in response to your access grant. Facebook Platform uses the OAuth 2.0 protocol for authentication and authorization. Suppose your Rails application allows users to share content with their Facebook friends. To support this, a connection needs to be established between a user's local account and her Facebook account. Once established, a Facebook instance can be obtained and used to post content to the user's wall. The basic idea is to store the access_token during an OAuth2 login process and later on use the token to fetch more data. The last days I was working on letting user sign-up/sign-in using Facebook account. I'm planning to integrate some so...
位置： 台灣台中市
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Connect to the Foursquare API via OAuth in your Rails application

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OAuth  is an open authentication protocol that allows secure API communication without the necessity of continually passing a username and password with each request. The idea for OAuth was conceived in 2006 by a group of individuals working on the Twitter implementation of OpenID.  After reviewing both OpenID and other existing industry practices, such as Amazon Web Services API and Flickr API, it was decided that a proposal should be written for a new open protocol for application authentication. OAuth has been widely adopted among major web services. Twitter, not only implementing OAuth as its primary API authentication method, but using it as the basis for its “ Sign in with Twitter ” service. Today, you’ll also find the protocol used by Facebook, Google, Yahoo, LinkedIn, and many others. Foursquare is a new and rapidly growing social utility whose potential for mash-ups with other applications is limited only by one’s own imagination. The Foursquare platform imple...
位置： 台灣台中市
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Running PHP application on Heroku (Mac OS X)

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Heroku is a very popular PaaS ( Platform as a Service ) cloud hosting service which allows you to deploy various applications, especially Ruby on Rails application. Heroku doesn't charge anything to sign up and has a free service upto 5 MB usage of PostgreSQL database, that's enough to used for your development environment. Heroku is majorly to Deploy Ruby on Rails, Node.js, Java, Clojure and Django apps, but you can also run any type of app (like PHP). The PHP support was launched in partnership with Facebook, to attract Facebook application  developers to Heroku's cloud platform ( Heroku support PHP ). In this post, you will learn how to deploy PHP project on Heroku. I assume that you already signed up with Heroku and configured your SSH keys with Heroku servers. If you haven't done it already, follow these instructions . You can try it out for yourself by just creating a new project folder with an index.php file in it, then creating a Heroku project. When you pu...
位置： 台灣
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