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Spectrum One is a hand-built ESP32-based Wi-Fi activity monitor designed to visualise wireless traffic in real time. Developed from breadboa
ESP32
WiFi
Displays

Spectrum One — Wi-Fi Activity Monitor

Sold by Currenari Lab

$76.85

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Original Design
This product was designed by Currenari Lab. By buying this product your support original hardware creators.
OSHWA Certified (UID: UK000086)
OSHWA Certification indicates that this product meets a uniform and well-defined standard for open-source compliance. See certification.oshwa.org for more information.
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Spectrum One — ESP32 WiFi Activity Monitor

Spectrum One is a compact, open-hardware WiFi activity monitor built around the ESP32. It continuously scans nearby wireless access points and displays live signal data on a 16×2 LCD and LED signal bar.

No phone. No app. No pairing. Just USB power and real-time wireless visibility.

OSHWA Certified Open Hardware (UID: UK000086)

FEATURES

  • ESP32-based WiFi scanning
  • 16×2 LCD with contextual signal data
  • LED bar visualising signal strength
  • Three fixed UI display modes
  • Single-button control
  • USB-C powered
  • Fully open hardware and firmware

DISPLAY MODES Mode 0 — Strongest Access Point
Shows the strongest detected WiFi access point and its RSSI.
Also displays the total number of access points found in the latest scan.

Mode 1 — Total Power (SUM)
Shows a combined relative signal strength of all detected access points.
Useful for comparing overall WiFi activity between locations.

Mode 2 — Field Level
Provides a simplified ambient activity view without listing individual networks.

All modes use the same scan data. Only the presentation changes.

BROWSING & FOLLOW MODE Browsing allows stepping through detected access points from the most recent scan. Follow mode locks onto a selected access point and continuously tracks its RSSI in real time.

TECHNICAL DETAILS

  • Scan interval: ~500 ms (~2 scans per second)
  • Firmware written in ESP-IDF
  • PCB designed in KiCad
  • Developed from breadboard prototype to production PCB
  • Fully documented development process

WHAT YOU RECEIVE

  • Fully assembled Spectrum One board
  • Pre-flashed firmware
  • Professionally manufactured PCB
  • ESD-safe packaging
  • Royal Mail Tracked shipping (UK)
  • USB-C powered (cable not included)

OPEN HARDWARE Complete hardware design files, Gerbers, firmware source, and build documentation are available.

Project page: https://currenari.com/spectrum-one/

GitHub: https://github.com/currenari/spectrum-one

Released as open hardware and open-source firmware. See repository for full license details.

Links to code and documentation

Documentation (currenari.com)

Code (github.com)

Certified Open Source Hardware - OSHW UK000086

Shipping policy

Units are in stock and ship within 24 hours on working days.

Orders placed on weekends or public holidays ship on the next working day.

Dispatch occurs Monday to Saturday, subject to post office opening hours.

All orders are shipped from the UK via Royal Mail Tracked.

Tracking information is provided once dispatched.

The seller

Currenari Lab

Currenari Lab logo

Preston, Lancashire, UK
0 orders since Feb 22, 2026
Hand-built electronics and firmware — an open-source development and publishing lab.