Meow!
Windows 10 GadgetsPower
0–3600 W
Real-time active power with peak detection over a configurable sliding window
measured in real time
What it tracks
Six parameters with historical graphs (today, yesterday, month, year, custom range) and live updates via WebSocket push.
Voltage
230 V
Mains voltage monitoring with warning and alert thresholds
Current
0–16 A
Instantaneous current with peak value over the last N samples
Power Factor
0–1
Ratio of active to apparent power — read directly from device firmware
Energy
kWh
Accumulated energy for any period: today, month, year or custom range
Bill
₴ € $
Automatic cost calculation with single-zone or two-zone (day/night) tariff
interface
What it looks like
A real-time monitoring dashboard — dark theme, responsive design, works on any screen.
under the hood
How it works
All components run locally — no cloud services required.
Tuya Relay
Atorch GR2PWS
Collector
collector.py
SQLite
WAL mode
FastAPI
api.py
Browser
WebSocket
Push, not polling — the device physically ticks every ~60 s. This is a hardware MCU firmware limit, not our delay. The collector listens for spontaneous packets via a persistent socket.
WebSocket live — the browser receives real-time updates via WS push from the server. HTTP fallback polling (every 5 s) starts automatically if the WebSocket fails to connect or drops.
SQLite + WAL — local database, no external services. All data stays on your PC or Raspberry Pi.
Remote access via Tailscale — built into Settings, no backend changes required since the API already binds to 0.0.0.0.
Watchdog — a supervisor process keeps the collector and API alive, restarting either one if it crashes, and shuts both down cleanly on exit.
On-demand analysis — a built-in engine turns raw telemetry into a structured report with plain-language insights, generated on request.
on demand
Built-in analysis engine
One click turns raw telemetry into a structured report with plain-language insights.
Health
Key Insights
Grid Quality
Input Capacity
Load Analysis
Power Factor
Energy Consumption
System State
Events
Detective Engine
Data Coverage
“Source impedance measured at 0.42 Ohm — the voltage dips you are seeing start in your own wiring, not out on the grid.”How the analysis engine works →
quick start
Getting started
Three steps to full energy monitoring.
1
⬇ Download
Download the installer for Windows or Linux from the Releases page. No Python, no dependencies, nothing to build.
Download →
2
⚙ Configure Tuya
Register on Tuya IoT Platform, create a project and get your Access ID, Secret and device Local Key.
How to do it →
3
▶ Run
Launch Power Trace — it starts the collector and API for you. Open
Settings →
localhost:8000 in your browser and configure in Settings.documentation
Guides
Step-by-step guides for every part of the setup.