Expo- Could not connect to the server

Question

i trying to open a new project in my iphone , and it shows this message:

NOTE: the connection is LAN , on TUNNEL mode it works fine but slow

Answer 1

You tried to connect to the wrong IP. the 127.0.0.1 is a localhost IP. You have to change to the IP where your Metro Builder Server runs on.

Maybe this Thread helps you to change to the correct IP: React Native Expo change default LAN IP

Answer 2

• Change to LAN connection type in expo-cli
• Open it again from your phone
• If you get a similar error but with your LAN IP, your network does not allow connections between devices on the network, and you need to use tunnel or use simulator with localhost.

Answer 3

1. Open Start > Control Panel > System
2. Go to Advanced System Settings > Environment Variables
3. Set a System Environment Variable with the following name/value pair:
4. name: REACT_NATIVE_PACKAGER_HOSTNAME
5. value: < the IPv4 address you want to use > (if any address does not work, enter the current address IPV4 you are using)

That's it!

IMPORTANT: remember to close and re-open the elevated PowerShell command prompt, since newly added Environment Variables wont' be available on the existing prompts.