GeigerConnect is an open-source project dedicated to creating an affordable, portable dosimeter that turns your smartphone into a powerful radiation mapping tool.
The idea behind GeigerConnect was born from a simple observation: professional Bluetooth-enabled dosimeters are either overpriced or rely on closed-source, proprietary apps. I wanted to create a "people's tool" — an accessible, open-source device that allows anyone to visualize the invisible.
Currently, the project is in its exciting "first steps" phase. I have developed a functional mobile app that communicates with a microcontroller via Bluetooth and maps data points in real-time. While the physical Geiger counter hardware is still on the workbench, the digital core is ready and tested using data simulation. My goal is to design a complete, easy-to-build kit with a custom PCB and a 3D-printed case that anyone can replicate at home.
- Live Mapping: Build radiation tracks with real-time markers based on OpenStreetMap (OSM).
- BLE Connectivity: Energy-efficient connection using Bluetooth Low Energy.
- Cross-platform: Mobile app built with Flutter (supports both Android and iOS).
- DIY Friendly: Designed to be assembled from widely available off-the-shelf components.
- App: Flutter (Mobile Framework)
- Maps: OpenStreetMap (OSM)
- Microcontroller: ESP32
- Communication: BLE (Bluetooth Low Energy)
- Planned Hardware: Geiger-Müller tube (SBM-20 / J305), OLED display, custom PCB.
- Phase 1: Connectivity & Logic
- BLE communication protocol (ESP32 <-> App)
- Live map integration (OSM) and marker logic
- Phase 2: Hardware Design (In Progress)
- Schematic design (Geiger tube driver + High-voltage module)
- Custom PCB layout and prototyping
- 3D-printable enclosure design
- Phase 3: Final Integration
- Standalone OLED display support
- Field testing and calibration
- Data export features (CSV/KML)
/app— Mobile application source code (Flutter)./firmware— ESP32 microcontroller code./hardware— (Work in progress) Schematics, Gerber files, and 3D models.
This project is fully open for suggestions! If you have ideas for improving the app or the electronics, feel free to open an Issue or submit a Pull Request. Let's make radiation safety accessible to everyone!
This project is developed and maintained by KarSar30 and Areg Danagoulian (ustajan).
Our mission is to create a transparent, high-precision tool for crowdsourced radiation mapping, enabling global community-driven environmental monitoring.
