GPS Tracker

GPS Tracker Project Documentation

Project Overview

This project involves developing a GPS tracker using a Raspberry Pi Pico (RP2040) and a SIM7040G module with a built-in GPS. The device will publish its location and cell data to AWS IoT Core every 5 minutes.

Hardware Components

• Raspberry Pi Pico (RP2040): Main microcontroller.
• SIM7040G Module: Provides LTE connectivity and GPS functionality.
• Battery: Powers the device.

Software and Connectivity

• MicroPython: Programming language for the Raspberry Pi Pico.
• AWS IoT Core: Cloud service for receiving and storing GPS data.

State Machine Design

States

1. Boot State: System initialization and hardware checks.
2. Configuration State: Network and MQTT setup, GPS module initialization.
3. Idle State: Low-power mode between data transmissions.
4. Track State: Active data retrieval and transmission to AWS.
5. Error State: Error detection and handling.

Error Handling Best Practices

• Clear identification and logging of errors.
• Graceful degradation and automated recovery.
• User notification for critical errors.
• Regular health checks for system components.

Power Management

Implement power-saving techniques, especially in the Idle State, to extend battery life.

Future Steps

• Testing and debugging the system.
• Designing a custom PCB integrating all components.
• Optimizing for efficient power usage and network reliability.