stratolink.org
An open source pico balloon network. This repository contains the payload hardware, firmware, website, and flight models. Follow the docs to build a payload, prepare a balloon, and register it on the dashboard.
Repository
hardware/ KiCad schematics, PCB layouts, component libraries, and assembly files
firmware/ STM32WLE5 firmware, PlatformIO configuration, and host tests
web/ Website, public docs, dashboard, APIs, and forecast worker
supabase/ Database migrations and permission checks
simulation/ Balloon trajectories, buoyancy, and fleet coverage models
analysis/ Antenna, radio, power, and flight studies; bench diagnostics
docs/ Engineering notes for flight qualification and forecasting
scripts/ Sticker layout tool
assets/ Original project artwork and simulation media
Firmware
Install PlatformIO. From the repository root:
cd firmware
cp include/secrets.h.example include/secrets.h
Fill in your regional TTN credentials, then build the flight environment:
pio run -e stratolink
Upload through J-Link over SWD:
pio run -e stratolink --target upload
Use the firmware revision that matches your board. Hardware setup covers assembly and programming; firmware/README.md covers configuration and host checks.
Website
Use Node 22. From the repository root:
cd web
cp .env.example .env.local
ONNXRUNTIME_NODE_INSTALL=skip npm ci
npm run dev
Set the values in .env.local as described in web/README.md. Run npm run verify before submitting website changes. Deployment and backend setup are documented there.
