OPENSENSOR ENGINEERING
STATION · 43.79°N 70.26°WCUMBERLAND, MAINE
PracticeOpenSensor Engineering LLC · Cumberland, Maine

Software that moves money.Firmware that works.

An engineering practice covering backend architecture, cloud platforms, fintech systems and hardware expertise.

STATUSACCEPTING WORK
CVE / 2026IN COORDINATION
INFERENCE200× SPEEDUP
STACKPY · JAVA · C · RS
IndexFive channels · self-select your destination

Channels

CH-01

Engineering

Backend architecture, system modernization, cloud platforms, full-stack delivery. Twenty years inside fintech, payroll, and e-commerce systems that move money.

Python · Django · Java · AWS · Terraform · Kubernetes
Enter Channel
CH-02

Open Source

LightNVR, pipenv stewardship, MARS NN runtime, Thingino contributions. The work that compounds when nobody pays you for it.

LightNVR · pipenv · MARS · Thingino
Enter Channel
CH-03

Grow Automation

GrowMax plant-automation boards and kits. Per-plant moisture monitoring, scheduled watering, no subscription. Hardware that ships in boxes.

GrowMax · MicroPython · Pi Pico · ESP32-S3
Enter Channel
CH-04

Products

OpenSensor electronics store, solar monitoring service, and 3D printing. Smaller surfaces with their own customers and their own catalogs.

Store · Solar · 3D Print
Enter Channel
CH-05

Security Research

Active vulnerability research held under a coordinated-disclosure timeline. Public advisories will be published after the embargo window closes.

Embargoed · Vendor Coordination · Pending
Enter Channel

Each channel is a separate operating mode. The site does not push consulting; it indexes the work.

Indoor Grow AutomationCH-03 / GROWMAX · ORIGINAL PRODUCT

Indoor grow automationwithout a subscription.

GrowMax boards and kits monitor moisture per plant and water on schedule. MicroPython firmware running on whichever Pi-Pico-pinout microcontroller you drop into the headers — no cloud lock-in, no monthly fee, the source is open. Built for indoor growers who'd rather understand their setup than rent it.

1 – 8 plants per boardper-plant moistureauto-wateringopen firmware
Enter the GrowMax channel
CULTIVATION · PLANT-01GROWING
MOISTURE · 64%SCHEDULE · ACTIVE● HEALTHY
Solar Monitoring AlertsCH-04 / SOLAR · MONITORING SERVICE

Solar that tells youwhen it stops earning.

Solar Monitoring Alerts watches your inverter and sends a heads-up the moment production drops, an inverter goes offline, or output diverges from forecast. Daily summaries, real-time alerts, and historical kWh — all without putting new hardware on your roof.

daily summariesreal-time alertsemail + SMSno install needed
Enter the Solar channel
SOLAR · ARRAY-01 · TELEMETRYALERTING
PRODUCTION · 4.2 kWIRRADIANCE · 920 W/m²● ALERTING
AccountingCH-04⅓ / OWLBOOKS · SISTER PROPERTY

Books that almostbalance themselves.

OwlBooks is the OpenSensor sister property for double-entry bookkeeping — built for engineers, freelancers, and small businesses who want a real ledger they own and can audit, not a SaaS subscription that re-prices itself every January.

double-entryopen ledgerowlbooks mcpinvoice tracking
Visit owlbooks.ai ↗
LEDGER · BOOK-01BALANCED
ENTRIES · 247DEBITS = CREDITS● BOOKED
LightNVRCH-04⅔ / NVR · SISTER PROPERTY

Network Video Recorderthat end users love.

LightNVR is an open-source network video recorder that runs on low-resource hardware — a Pi, a thin client, an old NUC. RTSP and ONVIF cameras, on-device motion detection, footage stored where you store everything else. There's also a managed cloud at lightnvr.com if you'd rather not host it yourself.

multi-channelself-hosted or cloudRTSP · ONVIFmotion detect
Visit lightnvr.com ↗
NVR · 4-CHANNEL● ON AIR
CHANNELS · 3 / 4 RECUPTIME · 14d 02h● HEALTHY
ManifestSelected captures · across all channels

Artifacts, not slogans.

Each row is a thing that exists in the world: a CVE, an OSS release, a runtime, a product. Click any record to inspect it.

End of manifest · 5 records

Full engineering portfolio →