Show HN: Esp32sim – Run ESP32 firmware in the browser(github.com)
183 points by joakimeriksson | 34 comments
GitHub repository for esp32sim, an open-source ESP32 emulator that runs real firmware locally or in the browser without physical hardware.
#esp32 on Hacker News
25 stories tagged esp32, newest first.
![Screenshot of youtube.com: GameBoy on E-Paper ESP32 at 30FPS [video]](https://hn.urlbox.com/shots/renders/2026/10/11/638f8aad-c52c-48ec-a2c1-24cd9814f1ff.jpg)
GameBoy on E-Paper ESP32 at 30FPS [video](youtube.com)
110 points by pizzaiolo | 30 comments
YouTube video from Bo Made It showing a Game Boy emulator running on an ESP32 with an e-paper display at 30 frames per second.
ESP32-C3 Adblock(github.com)
167 points by jayhoon | 65 comments
GitHub repository for a Pi-hole-style DNS ad-blocker running on a $2 ESP32-C3, storing 537k blocked domains as hashes in flash with a web dashboard.
Muse Gadgets(gadgets.muse.ai)
232 points by anant | 104 comments
Landing page for Muse Gadgets, open source DIY devices built on ESP32 or Raspberry Pi with SDKs to connect the Muse assistant to displays, buttons, and sensors.
Various Projects Find Hidden SDR Capabilities in ESP32 Microcontrollers(rtl-sdr.com)
271 points by nkw | 53 comments
RTL-SDR.com post reporting that several projects, including ESPARGOS, independently discovered hidden SDR capabilities in ESP32 microcontrollers.
Automating Wi-Fi setup testing on the ESP32(groundrun.io)
14 points by adunk | 0 comments
A groundrun.io blog post about automating tests of the Wi-Fi provisioning/setup flow on ESP32 devices.
Show HN: PaperMono, e-ink fridge magnet shopping list with mobile web page(github.com)
112 points by seamus_c | 51 comments
GitHub repository for an e-paper fridge-magnet shopping list on the M5Stack PaperMono, with a FastAPI server and phone web UI.
The newest ESP32 can run Linux and it's getting close to a Raspberry Pi(xda-developers.com)
182 points by adunk | 88 comments
XDA Developers article about the newest Espressif ESP32 chip being able to run Linux, bringing it closer to Raspberry Pi-class boards.
Show HN: Open-Source eInk Bike Computer(opentrailpaper.com)
380 points by stingrae | 117 comments
Landing page for OpenTrailPaper, open-source firmware turning the LilyGO T5S3 4.7" e-paper board into a DIY bike computer with ride data and offline maps.
Show HN: I replaced a $120k bowling center system with $1,600 in ESP32s
2701 points by section33 | 307 comments
Show HN post describing a DIY ESP32-based bowling scoring and lane-control system, OpenLaneLink, built to replace a costly proprietary system in a rural bowling center.
ESP32-S31(espressif.com)
341 points by volemo | 181 comments
Espressif product page for the ESP32-S31, a dual-core RISC-V SoC with multi-protocol wireless connectivity and HMI features.
Show HN: Glasses to detect smart-glasses that have cameras(github.com)
459 points by nullpxl | 168 comments
GitHub repository for banrays, a DIY glasses project that detects camera-equipped smart glasses like Meta Ray-Bans using IR reflections and BLE scanning.
Show HN: Air Lab – A portable and open air quality measuring device(networkedartifacts.com)
448 points by 256dpi | 178 comments
A web-based simulator running the Air Lab firmware, emulating a portable open air quality monitor that measures CO2, VOC, NOx, humidity, and pressure.
38C3: Illegal Instructions(media.ccc.de)
423 points by type0 | 63 comments
media.ccc.de archive page listing recorded talk videos from the 38th Chaos Communication Congress (38C3: Illegal Instructions) held in Hamburg in December 2024.
![Screenshot of media.ccc.de: Liberating Wi-Fi on the ESP32 [video]](https://hn.urlbox.com/shots/renders/2024/12/28/5a60ada3-d26f-4f9d-8f97-ec92dad9d2f3.jpg)
Liberating Wi-Fi on the ESP32 [video](media.ccc.de)
317 points by doener | 123 comments
Video recording of a 38C3 Chaos Communication Congress talk by Frostie314159 and Jasper Devreker on reverse engineering and liberating the ESP32's Wi-Fi stack.
Build a Low-Cost Drone Using ESP32(digikey.com)
409 points by m3at | 138 comments
A DigiKey Maker.io project guide with video showing how to build a low-cost quadcopter drone using an ESP32 microcontroller.
Show HN: I made a tiny device for automatically recording digital pianos(jamcorder.com)
531 points by chipweinberger | 167 comments
Product page for JamCorder, a small device that plugs into a digital piano to automatically record everything played, with companion mobile apps.
Show HN: RF Hunter – Find hidden cameras and other devices(github.com)
523 points by RamboRogers | 160 comments
GitHub repository for RFHunter, an ESP32-based RF signal scanner with an AD8317 detector and OLED display for finding hidden cameras and bugs.
CapibaraZero: A cheap alternative to FlipperZero based on ESP32-S3(capibarazero.github.io)
374 points by andreock | 77 comments
Documentation homepage for CapibaraZero, a low-cost Flipper Zero alternative firmware/hardware project built on Espressif ESP32-S3 boards.
Visualizing Weather Forecasts Through Landscape Imagery(github.com)
553 points by lds133 | 53 comments
GitHub repository for a project that renders weather forecasts as landscape imagery on e-ink displays using ESP32, MicroPython and OpenWeatherMap.
![Screenshot of youtube.com: The Cheating Device (ChatGPT on a TI-84) [video]](https://hn.urlbox.com/shots/renders/2024/9/19/b010ad23-2a74-4962-90e9-c31d3bddcb90.jpg)
The Cheating Device (ChatGPT on a TI-84) [video](youtube.com)
322 points by triyambakam | 192 comments
YouTube video by ChromaLock showing a TI-84 graphing calculator modified to access ChatGPT, billed as the ultimate cheating device.
Building an occupancy sensor with a $5 ESP32 and a serverless DB(matthew.science)
603 points by sodality2 | 198 comments
Blog post describing how the author built a campus occupancy sensor using a $5 ESP32 counting Bluetooth devices and a serverless database.
Show HN: RISC-V assembly tabletop board game (hack your opponent)(punkx.org)
372 points by throwaway71271 | 41 comments
Project page for Overflow, a tabletop and web board game where players write RISC-V assembly and exploit buffer overflows to hack opponents.
Privacy friendly ESP32 smart doorbell with Home Assistant local integration(tristam.ie)
362 points by rcarmo | 152 comments
A blog post about building a privacy-friendly ESP32 smart doorbell integrated locally with Home Assistant; the page returned a Cloudflare 502 error.
Show HN: Willow – Open-source privacy-focused voice assistant hardware(github.com)
492 points by kkielhofner | 121 comments
GitHub repository for Willow, an open-source, self-hosted voice assistant firmware for Espressif ESP BOX hardware that integrates with Home Assistant.