Unable to connect Android phone to my project with Expo

user_8039313 0
Viewed 23031

I created my project in react native by CLI:

_npm install -g create-react-native-app
_create-react-native-app AwesomeProject
_cd AwesomeProject
_npm start

Then I installed expo in my Android phone, and scanned a QR code on my computer screen.

However, my phone can't connect to project, and I don't know why. It just loads and fails. This is error message:

Could not load exp:// 192.168.56.1:19000. Network response timed out.

This is view error:

"Uncaught Error: java,not.SocketTimeoutException: faild to connect to/192.168.56.1 (port 19000) after 10000 ms.

I'm trying to fix it, but still can't get it working. My phone and my laptop are on the same network. What can I do now?

expo react-native
15 Answers

I had the same problem but solved by running expo start --tunnel

user_131012340

Select LOCAL instead of LAN.

screenshot

I kicked myself when I fixed this.

user_116736950

I had the same issue, turns out my firewall was blocking my connection to the development server port (for me it was 19000). Solved it by disabling firewall.

user_68451310

Choose Tunnel Instead of LAN or Local in connection tab. This solved the issue for me.

user_126038420

Make sure that your device and computer are one same LAN/Wifi. It will work. Also use LAN option.

user_96690680

check open port using

ufw status verbose

And if you don't see the port You are working on for example 19000 => expo try this

ufw allow 19000
user_105717720

I had this problem when my phone was connected via wifi and my destop was connected via LAN. I changed the connection mode in the browser window to tunnel, reloaded the expo app and was able to connect to my application. This was on my iOS device.

user_39888240

I got this issue on Win 10 with android and solved by the adding a firewall rule for my device (device IP as remote). I was using ESET NOD antivirus and it was block the device from accessing node.exe

user_20111560

for local testing e.g comnputer , simulator

expo start

for Real mobile device

expo start --tunnel

user_140274030

I'm on windows 10.

My network was set to public, but it needed to be private - so that it could safely expose devices like printers and in this case the Expo connection.

I went in my Wifi setting and clicked on Private: enter image description here

user_141313300

If you are using windows 10 do the following. It worked for me

1. Check if your phone and pc are sharing the same router/hotspot/wifi connection. better still you can connect your pc to your phone hotspot.
2. Configure the network you are using as private. you can do so using this link https://www.digitalcitizen.life/how-set-your-networks-location-private-or-public-windows-10/ 
3. Off your windows defender and any other antivirus. The windows and other antivirus defender acts as a firewall and prevents expo client from working.
It will work I assure you
user_145918080

I was having the same issue, the solution is easy just make a Firewall rule that allows connection from your mobile device to your PC. open port number 19000 and in the IP put your phone IP address then allow the connection TCP/UDP in both directions, and everything will be OK. Usually, you can edit the Firewall rules through your antivirus installed on your PC.

Careful don't disable your firewall, it will hurt you a lot.

user_68600980

This problem is due to the sdk version of the project is not compatible with the expo go ,so go to app.json of your project and edit to the latest version of sdk

user_154719500
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