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ESPectre Sensor: open-source motion detection system for ESP32

https://espectre.dev/
3•882542F3884314B•2h ago

Comments

amkharg26•2h ago
This is a clever approach to motion detection! Using Wi-Fi spectrum analysis is much more elegant than traditional PIR sensors or cameras for privacy-conscious setups.

The ESP32 is perfect for this - cheap, low power, and has the right hardware. I'm curious about the accuracy compared to traditional sensors. How well does it handle multiple people moving simultaneously? And what's the typical detection latency?

The Home Assistant integration is a nice touch. This could be really useful for automation triggers without needing line-of-sight or dealing with camera privacy concerns.

Alias Method

https://en.wikipedia.org/wiki/Alias_method
1•usgroup•1m ago•0 comments

I exposed my Homelab through Cloudflare Tunnels

http://ebourgess.dev/posts/exposing-homelab-through-cloudflare-tunnel/
1•ebourgess•2m ago•0 comments

Christmas 500 years ago was a drunken 6-week feast

https://fortune.com/2025/12/25/medieval-peasant-christmas-was-better-than-modern-holidays-histori...
1•Anon84•6m ago•0 comments

MemCachier Status Currently experiencing instability (for some days already)

https://status.memcachier.com
1•salzig•6m ago•0 comments

ReCollab: Retrieval-Augmented LLMs for Cooperative Ad-Hoc Teammate Modeling

https://arxiv.org/abs/2512.22129
1•StatsAreFun•7m ago•0 comments

Coverage.py sleepy snake logo (2019)

https://nedbatchelder.com/blog/201912/sleepy_snake.html
1•myroon5•7m ago•0 comments

New York's Subway, an Interview with Matthew Algeo

https://www.exasperatedinfrastructures.com/p/the-best-book-i-read-all-year
1•samsklar1•7m ago•0 comments

Show HN: A dynamic key-value IP allowlist for Nginx

https://github.com/dayt0n/kvauth
1•dayt0n•8m ago•0 comments

NYC Mayoral Inauguration Bans Raspberry Pi and Flipper Zero Alongside Explosives

https://blog.adafruit.com/2025/12/30/nyc-mayoral-inauguration-bans-raspberry-pi-and-flipper-zero-...
1•ptorrone•9m ago•0 comments

Show HN: Claude Cognitive – Working memory for Claude Code

https://github.com/GMaN1911/claude-cognitive
4•MirrorEthic•10m ago•1 comments

Nvidia in advanced talks to acquire AI21 in $2-3B deal

https://www.calcalistech.com/ctechnews/article/rkbh00xnzl
1•hbarka•10m ago•1 comments

A Course in Ring Theory

https://arxiv.org/abs/2512.22133
1•StatsAreFun•10m ago•0 comments

The Origami Wheel That Could Explore Lunar Caves

https://www.universetoday.com/articles/the-origami-wheel-that-could-explore-lunar-caves
1•rbanffy•11m ago•0 comments

You're Getting 'Screen Time' Wrong

https://www.theatlantic.com/technology/2025/10/screen-time-television-internet/684659/
1•Anon84•12m ago•0 comments

Exploiting Prime Selection Vulnerabilities in Public Key Cryptography (RSA)

https://arxiv.org/abs/2512.22720
1•bikenaga•12m ago•1 comments

HP told me I need to buy a new motherboard to reset the forgotten BIOS password

https://old.reddit.com/r/laptops/comments/1iauc47/hp_told_me_i_need_to_buy_a_new_motherboard_to/
2•sipofwater•12m ago•0 comments

Flint

https://www.flint.fyi/blog/introducing-flint/
2•tjwds•13m ago•0 comments

Hou Tu Pranownse Inglish

https://www.zompist.com/spell.html
1•aaronspeedy•13m ago•0 comments

Tw93/Mole: Deep clean and optimize your Mac

https://github.com/tw93/Mole
2•sharjeelsayed•15m ago•0 comments

EdgeVec – Vector search in the browser, no server (Rust/WASM)

https://github.com/matte1782/edgevec
1•matteo1782•16m ago•1 comments

Reconstructing UI behavior from video instead of screenshots

https://www.replay.build/learn/behavior-driven-ui-reconstruction
1•ma1or•19m ago•1 comments

Using Perplexity, Firecrawl and Gemini Flash to analyze 305 Links for 12.70 USD

https://vibegui.com/article/shipping-vibegui-bookmarks-v1-architecture-costs-and-lessons
2•gadr90•23m ago•1 comments

Coase's Penguin, Or, Linux and the Nature of the Firm [pdf]

https://www.benkler.org/CoasesPenguin.PDF
3•loughnane•24m ago•0 comments

Gallery of Bad Shell Code

https://github.com/koalaman/shellcheck
3•behnamoh•26m ago•0 comments

The FDA and FMT regulation (2024)

https://www.humanmicrobes.org/blog/fda-fmt-regulation
1•user234683•26m ago•0 comments

Brain immune cells may drive more damage in females than males with Alzheimer's

https://medicalxpress.com/news/2025-12-brain-immune-cells-females-males.html
1•bikenaga•28m ago•1 comments

Deep Filament Extraction for 3D Concrete Printing

https://arxiv.org/abs/2512.00091
1•PaulHoule•28m ago•0 comments

Show HN: Mafia Arena – LLMs play social deduction games against each other

https://mafia-arena.com
1•mohsen1•30m ago•0 comments

Mamdani Will Be Sworn in at Abandoned Subway Station Beneath City Hall

https://www.nytimes.com/2025/12/29/nyregion/mamdani-subway-sworn-in-mayor.html
2•Anon84•31m ago•0 comments

Psilocybin triggers activity-dependent rewiring of large-scale cortical networks

https://www.cell.com/cell/fulltext/S0092-8674(25)01305-4
4•QueensGambit•31m ago•0 comments