Vehicle Monitoring with ESP32, GPS, and Accelerometer

Table of Contents

• Overview
• Components
• Dependencies
• Setup
  • Wiring
  • WiFi Configuration
  • Adafruit IO Setup
  • Upload the Code
• Operation
• Data Visualization
• Power Management
• Additional Notes
• Flowchar

Overview

This project utilizes an ESP32 microcontroller, a GPS module, and a 6-axis accelerometer (GY-521) to monitor and publish real-time data about a moving vehicle. The data includes GPS coordinates, vehicle speed, and filtered accelerometer information.

Components

• ESP32 DevKit v1: Microcontroller for processing and communication.
• GPS Module: Provides latitude, longitude, and speed data.
• GY-521 6-Axis Accelerometer: Measures acceleration and orientation.

Dependencies

• Adafruit GPS Library
• Adafruit MPU6050 Library

Ensure that these libraries are installed in your Arduino IDE.

Setup

1. Wiring

   • Connect the GPS module and GY-521 accelerometer to the ESP32 using appropriate pins.
   • Refer to the comments in the code for pin configurations.

2. WiFi Configuration

   • Update the WIFI_SSID and WIFI_PASS variables in the code with your WiFi credentials.

3. Adafruit IO Setup

   • Create an account on Adafruit IO.
   • Set up feeds for GPS, Speed, and Acceleration.
   • Update the MQTT configuration variables (MQTT_SERVER, MQTT_PORT, MQTT_USERNAME, MQTT_KEY) with your Adafruit IO information.

4. Upload the Code

   • Upload the modified code to your ESP32 using the Arduino IDE.

Operation

• The ESP32 reads GPS data, including latitude, longitude, and speed.
• Accelerometer data is filtered using a complementary filter to obtain accurate pitch and roll.
• The filtered data (GPS, speed, and accelerometer) is published to Adafruit IO via MQTT.

Data Visualization

• Monitor your vehicle's data in real-time on the Adafruit IO dashboard.
• View GPS coordinates, speed, and filtered accelerometer information.

Power Management

• The code includes a deep sleep mode to minimize power consumption during idle periods.
• Adjust the sleep duration based on your application's requirements.

Additional Notes

• This code is a foundation for vehicle monitoring. Customize it based on your specific needs.
• Refer to the comments in the code for detailed explanations of configurations and adjustments.

Flowchart

graph TD
  subgraph Initialization
    A[Initialize ESP32] -->|Setup WiFi| B[Connect to WiFi]
    B -->|Setup GPS| C[Initialize GPS Module]
    C -->|Setup Accelerometer| D[Initialize MPU6050]
  end

  subgraph Main Loop
    D -->|Read GPS Data| E[Parse GPS Data]
    E -->|Valid GPS Fix| F[Calculate Speed]
    F -->|Read Accelerometer| G[Filter Accelerometer Data]
    G -->|Publish Data| H[Publish to Adafruit IO]
    H -->|Deep Sleep| I[Enter Deep Sleep Mode]
  end

  B -->|Reconnect if Disconnected| B

  style A fill:#86B300
  style B fill:#86B300
  style C fill:#86B300
  style D fill:#86B300
  style E fill:#5DADE2
  style F fill:#5DADE2
  style G fill:#5DADE2
  style H fill:#5DADE2
  style I fill:#EC7063

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