Back to Home11/17/2025, 2:40:54 PM

Show HN: ESPectre – Motion Detection Using Wi-Fi and Math

francescopace
1 points
0 comments

Mood

calm

Sentiment

positive

Category

tech

Key topics

Wi-Fi

Motion Detection

IoT

ESP32

Hi everyone, I'm the author of ESPectre.

This is an open-source (GPLv3) project that uses Wi-Fi signal analysis to detect motion using CSI data, and it has already garnered almost 2,000 stars in two weeks.

Key technical details:

- The system does NOT use Machine Learning, it relies purely on Math. — Runs in real-time on a super affordable chip like the ESP32. - It integrates seamlessly with Home Assistant via MQTT.

The author is sharing their open-source project, ESPectre, which uses Wi-Fi signal analysis to detect motion without Machine Learning, and has garnered significant interest on GitHub.

Snapshot generated from the HN discussion

Discussion Activity

Moderate engagement

First comment

5h

Peak period

9

Hour 10

Avg / period

3.3

Comment distribution50 data points

Based on 50 loaded comments

Key moments

  1. 01Story posted

    11/17/2025, 2:40:54 PM

    1d ago

    Step 01
  2. 02First comment

    11/17/2025, 7:50:23 PM

    5h after posting

    Step 02
  3. 03Peak activity

    9 comments in Hour 10

    Hottest window of the conversation

    Step 03
  4. 04Latest activity

    11/18/2025, 8:20:37 PM

    13h ago

    Step 04

Generating AI Summary...

Analyzing up to 500 comments to identify key contributors and discussion patterns

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ID: 45953977Type: storyLast synced: 11/17/2025, 2:42:03 PM

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