Hello everyone,
I’ve been exploring GNSS and ESP32-S3 development recently and put together a GPS tracker using the Reyax RYS352A multi-GNSS module and the Heltec WiFi LoRa 32 V4.
The tracker receives NMEA 0183 data at 115200 baud, displays coordinates on an onboard OLED, and hosts a lightweight web interface for viewing the current location and travel path. The system doesn’t rely on any cloud services or subscriptions.
Highlights
- Multi-GNSS support (GPS, GLONASS, Galileo, BeiDou, and QZSS)
- ESP32-S3 based implementation
- Browser-based interface using OpenStreetMap
- Local web server running entirely on the ESP32
While the current implementation works well as a proof of concept, I’m trying to think beyond the typical “vehicle tracker” use case and would appreciate input from the community on practical applications. I’m particularly interested in more innovative applications.
I documented the complete build, including schematics, source code, and testing notes here:
Build a GPS Tracker using Reyax GNSS Module and Heltec V4 Board
I’d love to hear how others would extend a project like this. If you had to turn a simple GNSS tracker into a product, what would you build?