RootLog is an offline environmental data logger that tracks temperature, humidity and air quality—storing everything locally on a microSD card. No internet. No subscriptions. No compromises.
Ships in 2 weeks • 30-day returns • Open source firmware
Compact design. Clear display. Built to blend into any environment while continuously monitoring what matters.
OLED screen shows current readings at a glance. Status LED confirms logging activity.
Transparent enclosure showcases the hardware. Perfect for educational settings and maker enthusiasts.
Track workspace conditions over weeks and months without cloud accounts or recurring fees.
Log environmental data for educational projects without internet dependency or privacy concerns.
Monitor air quality and climate in maker spaces where ventilation and temperature matter.
Keep your environmental data completely private. No servers. No telemetry. No compromises.
Temperature, humidity, pressure, CO2, and volatile organic compounds are continuously monitored.
Every reading is written to the microSD card with precise timestamps. No internet required.
Pop out the SD card and access standard CSV files. Import into any tool you prefer.
Your CSV data works with any analysis tool. Here's a week of monitoring from a home office.
Open CSV directly in spreadsheets
Pandas, Matplotlib, custom analysis
Professional dashboards & alerts
| Feature | RootLog | Typical Smart Monitor |
|---|---|---|
| Cloud Required | ✗ | ✓ |
| Subscription | ✗ | Often |
| Local Storage | ✓ | ✗ |
| Internet Dependency | None | Required |
| Data Ownership | Full | Limited |
| Works Indefinitely | ✓ | Until servers shut down |
Pop the SD card into your laptop. Drag the CSV into Excel, Python, or Grafana. No proprietary software required.
Date, Time, Temp_C, Hum_%, Press_hPa, Air_Quality_Index
06-01-2026, 21:00:01, 22.4, 45.1, 1013.25, 89
06-01-2026, 21:01:01, 22.5, 45.0, 1013.24, 90
06-01-2026, 21:02:01, 22.5, 45.2, 1013.23, 88
06-01-2026, 21:03:01, 22.6, 45.1, 1013.25, 91
06-01-2026, 21:04:01, 22.6, 45.0, 1013.26, 87Configurable from every second to 30 minutes
At 1-minute intervals. Centuries on a 16GB card.
On a standard 16GB microSD card
Built to run 24/7 with minimal power draw. USB-C powered for reliable, always-on monitoring.
No Wi-Fi chip. No cellular modem. Physically incapable of network communication.
Zero telemetry. Zero analytics. Your data never touches our servers because we don't have any.
Standard phone charger compatible. Low power consumption (~150mA average).
RISC-V architecture. Compact power. Hackable firmware.
Precision temp, humidity & pressure sensing. Industrial grade.
Air quality index sensor with incredible accuracy.
Real-time clock with battery backup. Accuracy is everything.
High contrast, low power. Glows in the dark.
Centuries of data on a single card. Your archives.
Choose your style and version. Ships in 2 weeks.
Transparent case shows all components. Perfect for makers and educational use.
Full enclosure. Only screen and button visible. Professional appearance.
Local Data. Zero Cloud. Total Transparency.
The RootLog Maker Kit is a love letter to electronics. It arrives as a curated set of high-quality components designed for the conscious builder—offering you the rare power to capture the pulse of the environment without ever touching the cloud.