Unable to connect Android phone to my project with Expo

Question

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?

May be not. I just follow the instructions in "https://facebook.github.io/react-native/docs/getting-started.html". So what does it mean ? — tiến dũng nguyễn, Aug 08 '17 at 03:23
With Expo SDK, expo will generate tunnel link to your local ip, or you can publish your react native app to their server so you can always look your app when you turn off dev mode. I have some problem when using local ip. — Rahmat Aligos, Aug 08 '17 at 03:52

Neelesh Shetty · Answer 1 · 2020-07-13T12:34:47.037

24

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

edited Jul 13 '20 at 12:34

answered Jul 09 '20 at 19:12

Neelesh Shetty

389
2
7

Tunnel is very very slow, instead connect phone with usb and do the same. – KUMAR SAURAV Mar 16 '21 at 09:00
This worked for me. Thanks – Java Boss Feb 08 '22 at 00:36
would like to know how this works. is it just using ngrok as a tunnel from computer to phone? – 128KB Feb 25 '23 at 22:52
1

why does not work without --tunnel? – captainblack Apr 18 '23 at 09:11

score 10 · Answer 2 · edited Jun 03 '20 at 15:45

10

Select LOCAL instead of LAN.

screenshot

I kicked myself when I fixed this.

edited Jun 03 '20 at 15:45

Matt Ke

3,599
12
30
49

answered Jun 03 '20 at 15:13

Daniel Joseph Kibby

101
1
3

2

Where is this setting? I could not found in expo go app – captainblack Apr 18 '23 at 09:12

score 7 · Answer 3 · answered Nov 25 '18 at 05:08

7

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.

answered Nov 25 '18 at 05:08

Vishist Varugeese

1,500
1
17
30

Thanks! I was able to open port 19000, that also seems to have fixed it. – Nabha Cosley Dec 07 '21 at 21:00

score 7 · Answer 4 · answered Mar 14 '21 at 01:57

7

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

answered Mar 14 '21 at 01:57

Shivam Kakkar

91
1
2

score 5 · Answer 5 · answered Aug 08 '17 at 04:00

5

Keep a look on this issue for the answer: https://github.com/react-community/create-react-native-app/issues/60

answered Aug 08 '17 at 04:00

Rahmat Aligos

1,164
11
13

oh my ghost, my issue was solved. I desibled all virtual network and it worked. Thank you so much. – tiến dũng nguyễn Aug 08 '17 at 07:20

score 4 · Answer 6 · answered Jul 15 '19 at 11:58

4

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

answered Jul 15 '19 at 11:58

Harsh Maisheri

139
14

yes, thank for your opinion, In my case, I have installed virtual box and this is why it confuses network to connect. – tiến dũng nguyễn Jul 16 '19 at 02:41
This solved it for me. My computer and device were on different networks. Thank you! – Matt May 23 '22 at 01:18

score 3 · Answer 7 · edited May 05 '23 at 03:47

3

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

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.
Configure the network you are using as private. You can do so using this link.
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.

edited May 05 '23 at 03:47

user16217248

3,119
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answered Aug 27 '22 at 18:44

Ajani Timothy

176
4

I only needed to go up until step 2 and it worked! Thanks! :) – Noah Velasco Aug 09 '23 at 10:53

score 2 · Answer 8 · answered Feb 08 '22 at 13:43

2

for local testing e.g comnputer , simulator

expo start

for Real mobile device

expo start --tunnel

answered Feb 08 '22 at 13:43

Phakamani Xulu

259
5
14

score 2 · Answer 9 · answered Feb 22 '22 at 22:16

2

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:

answered Feb 22 '22 at 22:16

Alexandre Desroches

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How does this solve the problem? – ryanwebjackson Feb 27 '22 at 20:25
@ryanwebjackson as stated in my answer, it allows the network to be exposed and visible to the Expo internal requirements. I don't know how Expo does that but without this configuration in the Windows Wifi settings, it was impossible for Expo to connect with my Android device. This solution is probably part of other problems but in my case it solved it. – Alexandre Desroches Feb 27 '22 at 21:13

score 1 · Answer 10 · edited Apr 15 '18 at 06:09

I've had a similar problem on iOS - the project showed up in the Expo app but didn't want to connect.

Here's what I did:

Connect your PC to your device through USB cable
Download the newest xde from: https://github.com/expo/xde/releases
Install XDE, create a new project from the gui (do NOT use your old project from create-react-app, as it may also show up in XDE) and click the newly created (in XDE) project under "My Projects".

Now your project should show up in the Expo app on your phone. If it doesn't try sending yourself the link to your app over email (to your own inbox, and open the link on your phone), mine looks like this: exp://5c-gp9.[accountname].my-new-project.exp.direct:80

score 1 · Answer 11 · answered Jan 24 '19 at 18:44

1

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.

answered Jan 24 '19 at 18:44

Shane Walker

301
3
7

score 1 · Answer 12 · answered Nov 18 '19 at 17:45

1

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

answered Nov 18 '19 at 17:45

Najam

141
1
8

score 1 · Answer 13 · answered Aug 03 '20 at 12:58

1

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

answered Aug 03 '20 at 12:58

Majdi Mohammad

139
1
4

score 0 · Answer 14 · answered Feb 01 '21 at 23:17

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.

score 0 · Answer 15 · answered May 21 '21 at 13:28

0

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

answered May 21 '21 at 13:28

Elias kibret

21
5

Unable to connect Android phone to my project with Expo

15 Answers15