ESP32 UWB Indoor Positioning System - image 1
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ESP32 UWB Indoor Positioning System

Real-time indoor positioning demo using 3 ESP32 UWB modules (2 anchors + 1 tag) with trilateration, UDP data streaming, and Python-based position visualization on PC.

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Boards:ESP32
Firmware:Arduino
Use Cases:IoT Prototyping
GitHubBlog Post

Overview

Official Makerfabs demo showing how to build a real-time indoor positioning system using three ESP32 UWB modules. Two modules act as stationary anchors while one serves as a mobile tag, with position data displayed graphically on a PC.

How It Works

  • Two anchors are placed at known positions on opposite sides of the room
  • The mobile tag measures distances to both anchors using double-sided two-way ranging
  • Distance data is transmitted over WiFi via UDP protocol
  • A Python script calculates the tag's 2D coordinates using the law of cosines
  • Real-time position is displayed on a graphical interface

Hardware Required

  • 3x ESP32 UWB modules (Makerfabs)
  • Power banks or 5V power supplies for anchors
  • PC running Python for visualization

Results

The system achieves approximately 10cm accuracy for indoor position tracking, with real-time coordinate updates as the tag moves through the space.

Resources

Blog Post

Project writeup & details

GitHub Repository

Source code & project files