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TROUBLESHOOTING.md

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Troubleshooting Guide

Common Issues and Solutions

1. Door Not Responding to Commands

Symptoms:

  • Toggle switch doesn't affect the door
  • No response from the system when trying to open/close

Possible Solutions:

  • Check your internet connection
  • Ensure the Arduino is powered on and connected to WiFi
  • Verify that the correct Thing ID and Property ID are set in the .env file
  • Restart the Node.js server

2. Authentication Issues

Symptoms:

  • Unable to log in
  • "Not authenticated" errors

Possible Solutions:

  • Double-check the password in the .env file
  • Clear browser cookies and cache
  • Ensure AUTH_REQUIRED is set correctly in the .env file

3. Motor Not Moving

Symptoms:

  • Commands are received but the door doesn't physically move

Possible Solutions:

  • Check all physical connections between the Arduino, motor driver, and motor
  • Verify the power supply to the motor is adequate (24V)
  • Ensure the Arduino code is correctly uploaded and running
  • Check jumper settings on the L298N motor driver (refer to L298N documentation)

4. Unexpected Door Behavior

Symptoms:

  • Door opens when it should close or vice versa

Possible Solutions:

  • Check the wiring between the motor driver and the motor
  • Verify the logic in the Arduino code for interpreting open/close commands

5. Server Won't Start

Symptoms:

  • Error messages when trying to start the Node.js server

Possible Solutions:

  • Ensure all required environment variables are set in the .env file
  • Check that all dependencies are installed (npm install)
  • Verify Node.js is installed and up to date

6. High Latency in Door Response

Symptoms:

  • Long delay between sending a command and the door responding

Possible Solutions:

  • Check your internet connection speed
  • Verify the Arduino's WiFi signal strength
  • Optimize the server code for faster processing

7. Arduino Getting Stuck on Serial.begin

Symptoms:

  • Arduino code doesn't progress past the Serial.begin line when not connected to a computer

Solution:

  • Ensure the Arduino has a proper power source and is not relying on the serial connection for power

8. Power Supply Issues

Symptoms:

  • Inconsistent behavior of Arduino or motor
  • Components not working as expected

Solution:

  • Use a DC-DC buck converter to step down voltage where necessary
  • Ensure all components are rated for the supplied voltage
  • Verify that the Arduino and motor driver can share a power supply without causing voltage issues

9. Connecting to Eduroam WiFi

Symptoms:

  • Arduino unable to connect to the Eduroam network

Solution:

  • Use WPA2 Enterprise settings
  • Ensure the correct identity and credentials are used
  • Refer to Eduroam setup guides for specific configuration details

10. Motor and Driver Compatibility Issues

Symptoms:

  • Motor driver overheating
  • Motor not working correctly with the driver

Solution:

  • Ensure the motor and driver are compatible in terms of voltage and current ratings
  • Use proper heat sinks if necessary to manage temperature

11. 5V Output Issues on Arduino Nano ESP32 Connect

Symptoms:

  • 5V output not working on the Arduino

Solution:

  • Solder the VUSB pads as shown in the Arduino documentation
  • If soldering tools are not available, seek help from someone experienced

12. Miscellaneous Hardware Issues

Symptoms:

  • Intermittent connections
  • Unreliable operation

Solution:

  • Regularly inspect and replace damaged wires
  • Ensure all connections are secure
  • Use proper wire stripping and connection techniques
  • Be cautious when using breadboards and verify all connections

If you encounter issues not covered here, or if the suggested solutions don't resolve your problem, please create an issue on my GitHub repository with detailed information about the problem and any error messages you're seeing.