How to Solve the Expo Network Response Timed Out Problem

If you’re developing a React Native app with Expo and you’re encountering a “network response timed out” error, it’s likely due to the port that Expo’s Metro bundler is running on not being open on your machine.

The solution is to open the necessary port so that your device or emulator can connect to the Metro server.

Steps to Solve the Expo Network Response Timed Out Problem on Linux (Ubuntu)

1. Check the Current Open Ports:

In your terminal, run the following command to view the currently open ports:

sudo ufw status verbose

• Look for the port that Expo’s Metro bundler is running on (usually 8081).
• If you don’t see the port listed, you’ll need to open it.

2. Open the Expo Metro Port: Run the following command to open the Expo Metro port (replace 8081 with the port number if different):

sudo ufw allow 8081/tcp

This will open the port and allow traffic to flow through it.

After following these steps, your Expo “network response timed out” issue should be resolved, and you should be able to connect your device or emulator to the Expo Metro server without any problems.

If you continue to encounter issues, make sure to check your firewall settings and ensure that the specified port is not being blocked. You may also want to try restarting your development environment or the Expo Metro server to see if that resolves the problem.