--- title: Show HN: I replaced a $120k bowling center system with... description: An SRE who owns a rural bowling center built a DIY replacement for a $80-120k commercial scoring system using ESP32 microcontrollers, costing roughly $200 per... canonical: https://daily.dev/posts/show-hn-i-replaced-a-120k-bowling-center-system-with-1-600-in-esp32s-iul47pmru twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Show HN: I replaced a $120k bowling center system with $1,600 in ESP32s | daily.dev og:description: An SRE who owns a rural bowling center built a DIY replacement for a $80-120k commercial scoring system using ESP32 microcontrollers, costing roughly $200 per... og:url: https://daily.dev/posts/show-hn-i-replaced-a-120k-bowling-center-system-with-1-600-in-esp32s-iul47pmru og:image: https://api.daily.dev/og/posts/Iul47PMRu.png og:image:alt: Show HN: I replaced a $120k bowling center system with $1,600 in ESP32s og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Show HN: I replaced a $120k bowling center system with $1,600 in ESP32s **[Hacker News](https://daily.dev/sources/hn)** · 4 min read · 3 upvotes · 1 comments ## Summary An SRE who owns a rural bowling center built a DIY replacement for a $80-120k commercial scoring system using ESP32 microcontrollers, costing roughly $200 per lane pair. The system uses ESPNow mesh networking with RS485 fallback, a Raspberry Pi lane computer running Redis as a state machine, and a React/WebSocket frontend. The author plans to open source the full stack as OpenLaneLink, motivated by extreme vendor lock-in, high replacement costs, and the availability of modern open hardware. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### How can ESP32 microcontrollers be used to build a mesh network for real-time sensor and control systems? ESP32s can form a star-topology mesh using ESP-NOW for wireless communication, with RS485 as a wired fallback in noisy RF environments. Each node emits sensor events and accepts commands, reporting to a gateway node connected over UART to a central computer, such as a Raspberry Pi, which relays data into Redis and a state machine for processing. _daily.dev surfaces projects like this for engineers designing their own low-cost embedded mesh networks._ ### How much does it cost to replace a commercial bowling center scorekeeping system compared to a DIY ESP32-based alternative? A commercial 1:1 replacement of a bowling scorekeeping system installed in 2008 runs $80,000-$120,000 depending on features and vendor, with replacement parts costing about $4,000 per lane pair. A DIY equivalent built with ESP32 microcontrollers, relays, optocouplers, and IR-break-beam sensors costs roughly $200-$400 per lane pair. _developers weighing build-versus-buy on hardware projects can track cost breakdowns like this on daily.dev._ ## Community discussion Top comments from developers on daily.dev. **@ezee** · 0 upvotes > Nice. That's crazy customer abuse, happy to see it disrupted. ## Similar posts on daily.dev - [My ESP32 fills the same niche as a Raspberry Pi SBC, and it does so at a fraction of the cost](https://daily.dev/posts/my-esp32-fills-the-same-niche-as-a-raspberry-pi-sbc-and-it-does-so-at-a-fraction-of-the-cost-qsxzantnn) · XDA Developers · 1 upvotes · 0 comments - [I replaced my Raspberry Pis with $5 ESP32s for smart home projects, and they do everything I need](https://daily.dev/posts/i-replaced-my-raspberry-pis-with-5-esp32s-for-smart-home-projects-and-they-do-everything-i-need-tusk09yso) · XDA Developers · 3 upvotes · 0 comments - [ESP32 Replacement For Lighting Display Controller](https://daily.dev/posts/esp32-replacement-for-lighting-display-controller-a7zchuj0x) · Hackaday · 0 upvotes · 0 comments - [An ESP32-S31-based modular development platform for AI-assisted hardware creation](https://daily.dev/posts/an-esp32-s31-based-modular-development-platform-for-ai-assisted-hardware-creation-qiwacviul) · CNX Software · 0 upvotes · 0 comments --- Tags: [#iot](https://daily.dev/tags/iot), [#computer-vision](https://daily.dev/tags/computer-vision), [#embedded](https://daily.dev/tags/embedded), [#redis](https://daily.dev/tags/redis) [View this post on daily.dev](https://daily.dev/posts/show-hn-i-replaced-a-120k-bowling-center-system-with-1-600-in-esp32s-iul47pmru) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Show HN: I replaced a $120k bowling center system with $1,600 in ESP32s","url":"https://daily.dev/posts/show-hn-i-replaced-a-120k-bowling-center-system-with-1-600-in-esp32s-iul47pmru","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/show-hn-i-replaced-a-120k-bowling-center-system-with-1-600-in-esp32s-iul47pmru"},"datePublished":"2026-07-19T18:44:07.707Z","dateModified":"2026-09-13T19:03:53.287Z","description":"An SRE who owns a rural bowling center built a DIY replacement for a $80-120k commercial scoring system using ESP32 microcontrollers, costing roughly $200 per...","image":"https://media.daily.dev/image/upload/s--0_ODbtD2--/f_auto/v1722860399/public/Placeholder%2008","thumbnailUrl":"https://media.daily.dev/image/upload/s--0_ODbtD2--/f_auto/v1722860399/public/Placeholder%2008","isAccessibleForFree":true,"articleSection":"Hacker News","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Hacker News","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/hn","url":"https://daily.dev/sources/hn"},"commentCount":1,"discussionUrl":"https://daily.dev/posts/show-hn-i-replaced-a-120k-bowling-center-system-with-1-600-in-esp32s-iul47pmru","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":3},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":1}],"keywords":"iot,computer-vision,embedded,redis","timeRequired":"PT4M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Hacker News","item":"https://daily.dev/sources/hn"},{"@type":"ListItem","position":3,"name":"Show HN: I replaced a $120k bowling center system with $1,600 in ESP32s"}]} {"@context":"https://schema.org","@type":"WebPage","@id":"https://daily.dev/posts/show-hn-i-replaced-a-120k-bowling-center-system-with-1-600-in-esp32s-iul47pmru","comment":[{"@type":"Comment","text":"Nice. That’s crazy customer abuse, happy to see it disrupted.","datePublished":"2026-07-20T08:11:40.125Z","url":"https://daily.dev/posts/Iul47PMRu#c-wMPPid1OD","author":{"@type":"Person","name":"E","url":"https://daily.dev/ezee","image":"https://media.daily.dev/image/upload/s--fCfktlbR--/f_auto/v1767451916/avatars/avatar_93JdfDmXtcEWkGXSGC1ne?_a=BAMAK+ZW0"}}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/show-hn-i-replaced-a-120k-bowling-center-system-with-1-600-in-esp32s-iul47pmru#faq","mainEntity":[{"@type":"Question","name":"How can ESP32 microcontrollers be used to build a mesh network for real-time sensor and control systems?","acceptedAnswer":{"@type":"Answer","text":"ESP32s can form a star-topology mesh using ESP-NOW for wireless communication, with RS485 as a wired fallback in noisy RF environments. 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