--- title: Teardown Of An USB-C Cable With Integrated LCD | daily.dev description: A hobbyist disassembled a €15, 240W UGreen USB-C cable that has a built-in LCD screen showing voltage and current readings. Getting inside required destructive... canonical: https://daily.dev/posts/teardown-of-an-usb-c-cable-with-integrated-lcd-4vqfqqnna twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Teardown Of An USB-C Cable With Integrated LCD | daily.dev og:description: A hobbyist disassembled a €15, 240W UGreen USB-C cable that has a built-in LCD screen showing voltage and current readings. Getting inside required destructive... og:url: https://daily.dev/posts/teardown-of-an-usb-c-cable-with-integrated-lcd-4vqfqqnna og:image: https://api.daily.dev/og/posts/4VqfqQNNa.png og:image:alt: Teardown Of An USB-C Cable With Integrated LCD 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. # Teardown Of An USB-C Cable With Integrated LCD **[Hackaday](https://daily.dev/sources/hackaday)** · 2 min read · 1 upvotes · 0 comments ## Summary A hobbyist disassembled a €15, 240W UGreen USB-C cable that has a built-in LCD screen showing voltage and current readings. Getting inside required destructive methods on the glued display cover and aluminum shell. Inside, the display connects via a flex cable to a PCB with voltage regulators, a backlight MOSFET, and a Cortex-M0+ MCU (marked EN32LF056) with 64 kB flash and 4 kB SRAM, which was confirmed via its exposed SWD interface. The MCU isn't wired to the USB data lines, so it only handles power monitoring, but accessing SWD pads could allow custom firmware flashing as a potential hack. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### What MCU is used in USB-C cables that have a built-in LCD screen showing voltage and current? A Cortex-M0+-based microcontroller marked EN32LF056 with 64 kB of Flash and 4 kB of SRAM drives the display in one such cable, a €15, 240-watt-rated UGreen USB-C cable. It communicates over an exposed SWD interface and only measures voltage and current, since it isn't wired to the USB data lines. _Tinkerers exploring unusual embedded hardware finds teardown write-ups like this through daily.dev._ ## Similar posts on daily.dev - [Name that Ware, March 2026 « bunnie's blog](https://daily.dev/posts/name-that-ware-march-2026-bunnie-s-blog-pu6cdsbjv) · bunnie's blog · 0 upvotes · 0 comments - [I stopped trusting USB-C cable labels and started testing them with a $15 meter instead](https://daily.dev/posts/i-stopped-trusting-usb-c-cable-labels-and-started-testing-them-with-a-15-meter-instead-daqejli11) · Hacker News · 2 upvotes · 0 comments - [Wireless LCD Streaming For The ANENG AN870 Multimeter](https://daily.dev/posts/wireless-lcd-streaming-for-the-aneng-an870-multimeter-j4tznv4gl) · Hackaday · 1 upvotes · 1 comments - [I connected a local LLM to a $30 ESP32 display, and it designs a new screen for every question I ask](https://daily.dev/posts/i-connected-a-local-llm-to-a-30-esp32-display-and-it-designs-a-new-screen-for-every-question-i-ask-hewzqepyu) · XDA Developers · 0 upvotes · 0 comments - [Technology: The \(nearly\) perfect USB cable tester does exist](https://daily.dev/posts/technology-the-nearly-perfect-usb-cable-tester-does-exist-kkk3geg4z) · Lobsters · 1 upvotes · 0 comments --- Tags: [#embedded](https://daily.dev/tags/embedded), [#reverse-engineering](https://daily.dev/tags/reverse-engineering) [View this post on daily.dev](https://daily.dev/posts/teardown-of-an-usb-c-cable-with-integrated-lcd-4vqfqqnna) ```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":"Teardown Of An USB-C Cable With Integrated LCD","url":"https://daily.dev/posts/teardown-of-an-usb-c-cable-with-integrated-lcd-4vqfqqnna","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/teardown-of-an-usb-c-cable-with-integrated-lcd-4vqfqqnna"},"datePublished":"2026-10-02T11:19:30.151Z","dateModified":"2026-10-02T11:19:49.229Z","description":"A hobbyist disassembled a €15, 240W UGreen USB-C cable that has a built-in LCD screen showing voltage and current readings. 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