Build A Gps Tracker With Seeed Studio Xiao Esp32-s3

In this project, you’ll build a compact Wi-Fi GPS tracker using the Seeed Studio XIAO ESP32-S3 microcontroller and a Neo-6M GPS module.

Unlike traditional GSM-based solutions, this tracker sends GPS location data over Wi-Fi to the GeoLinker cloud platform, where you can view routes, set geofencing zones, and get automated SMS alerts when boundaries are crossed — all without a SIM card or cellular service.

This project is ideal for makers, hobbyists, and IoT enthusiasts looking to monitor vehicles, pets, or assets with a low-cost, real-world tracking solution that leverages cloud APIs and offline buffering.

GPS tracker using the Seeed Studio XIAO ESP32-S3

GPS tracker using the Seeed Studio XIAO ESP32-S3

• No Cellular Service Required: Uses Wi-Fi to upload GPS coordinates to the cloud.
• Geofencing Alerts: Detects when your tracker leaves a predefined area.
• SMS Notifications: Sends location alerts via SMS when the geofence is breached.
• Offline Storage: Buffers location data when Wi-Fi is unavailable and syncs later.
• Real-Time Mapping: View routes and history on the GeoLinker dashboard.
• Free Tier Support: Includes a free allocation of location history and API usage.

CircuitDigest Cloud

CircuitDigest Cloud

GPS Lock: The Neo-6M module receives satellite signals and computes latitude/longitude.

Data Parsing: XIAO ESP32-S3 reads GPS NMEA data over UART.

Cloud Upload: Coordinates are sent over Wi-Fi to GeoLinker at defined intervals.

Geofence Check: The system continuously calculates distance from the home location using the Haversine formula.

Alerts: If the tracker crosses the set radius, an SMS is triggered via the cloud API.

Offline Sync: If offline, GPS points are buffered and uploaded once connectivity returns.

Circuit Diagram

Circuit Diagram

Hardware

• Seeed Studio XIAO ESP32-S3
• Neo-6M GPS Module
• Breadboard & jumper wires
• External GPS antenna (for reliable reception)
• Software
• Arduino IDE
• Libraries: GeoLinker, TinyGPSPlus, WiFiClientSecure

Components

Components

• Wire the hardware: Connect the Neo-6M GPS module to the XIAO ESP32-S3 (TX/RX, power, GND).
• Sign up for GeoLinker: Create an account and generate an API key for uploading data and enabling SMS alerts.
• Configure your code: Load Wi-Fi credentials, API key, device ID, update interval, and geofence radius into the Arduino sketch.
• Upload & Test: Upload firmware and check location updates on the cloud dashboard.

• Vehicle tracking without cellular plans
• Pet or child safety geofencing
• Asset monitoring and route histories
• Offline-resilient location logging

Real Time Working

Real Time Working

This project helps you explore:

• GPS integration with microcontrollers
• Wi-Fi communication and cloud APIs
• Geofencing logic and SMS triggers
• Offline data buffering for IoT reliability