Android Question Failed TCP/IP connection

[Paolodc]

Hello guys. I have a problem with TCP/IP connection. I've seen Erel Network Tutorial until 17:58 minute. I've written all code both in B4J and B4A. I've used the 51042 port and my device ip. The code It was compiled in debug mode and with USB debug, but it wasn't work. I don't understand. (Sorry for my english)

 

[Erel]

Start with this example: https://www.b4x.com/android/forum/t...-asyncstreams-b4xserializator.119011/#content

 

[Paolodc]

Erel after I writen this code I have this problem:
Failed to connect: (SocketTimeoutException) java.net.SocketTimeoutException: failed to connect to /***.***.1.21 (port 51042) from /***.***.1.24 (port 38552) after 10000ms
Maybe the problem will be the closed port or port not available?

 

[Erel]

This is a local ip address. No need to hide it.

I guess that you are trying to connect from the Android device to the PC. This can only work after you open the port in Windows firewall.

Connect the PC to the Android instead.

 

[Paolodc]

I tried to connect the pc to Android, but it doesn't work. I also reversed the video tutorial codes but it just doesn't make the connection and I don't understand what's the problem.

The code has no errors and I also tried using different ports but nothing. On the windows firewall I also put port 51042 accessible to all but nothing. I just don't understand.

 

[Erel]

No need to change any code. Just run the B4J and B4A programs.

Post the logs and post screenshots.

 

[Paolodc]

 

[Erel]

You are not running the correct example or code.

Carefully read my answers in posts #2 and #6.

 

[Paolodc]

 

[DonManfred]

Please post ERRORs as TEXT (right click to copy)

 

[Paolodc]

java.net.SocketTimeoutException: connect timed out
at java.base/java.net.PlainSocketImpl.waitForConnect(Native Method)
at java.base/java.net.PlainSocketImpl.socketConnect(PlainSocketImpl.java:107)
at java.base/java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:399)
at java.base/java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:242)
at java.base/java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:224)
at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:403)
at java.base/java.net.Socket.connect(Socket.java:591)
at anywheresoftware.b4a.objects.SocketWrapper$1.run(SocketWrapper.java:140)
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:834)

 

[Erel]

It is possible that your router is configured to block local traffic.

 

[Paolodc]

Could there be another option?
Could I connect both the pc and android to network gigs from the phone?

 

[Cenny]

Could there be another option?
Could I connect both the pc and android to network gigs from the phone?

I am curious, is your problem solved? And if so how?

 

[OliverA]

It is possible that your router is configured to block local traffic.

This. Make sure your router does not have WiFi isolation turned on.

 

[Cenny]

This. Make sure your router does not have WiFi isolation turned on.

Thanks for the suggestion. However I have no idea how to do that...

 

[OliverA]

However I have no idea how to do that...

What router do you have? Do you have admin access to the router?

 

[Cenny]

What router do you have? Do you have admin access to the router?

I have a Sagecom Modem (F@ST3896LG-TN) with build in Router.
No admin accès as far as I know.

 

[OliverA]

Sagecom Modem (F@ST3896LG-TN)

The quick research on this modem shows that it can be configured by an app and through the router's web interface. According to some posts I read, both are limited in their capabilities. Looks like this modem was furnished by your cable company and it might be worth giving them a call to check your configuration of your device.

 

[Cenny]

The quick research on this modem shows that it can be configured by an app and through the router's web interface. According to some posts I read, both are limited in their capabilities. Looks like this modem was furnished by your cable company and it might be worth giving them a call to check your configuration of your device.

Assumed that my modem has AP-isolation switched on, then it should be possible to go past the modem by switching wifi off and let the communication go via the telephone network. It did not work either.