Need help with Ketai Bluetooth - SOLVED

Android Processing

schprlock

Need help with Ketai Bluetooth - SOLVED

in Android Processing • 1 year ago

EDIT - Great timing - Ketai v7 solved the problem!

Hi,

I am trying to use Ketai to comunicate over Bluetooth with my Android Phone (Galaxy SII).

I have implemented simple bluetooth communications, but Ketai seems to be an excellent library and provides easy access to sensors, which I will eventually also need.

My low(er) lever approach works fine, so I have no problems with bluetooth hardware.

When trying to use Ketai's bluetooth example, listing devices works fine, as detection and even pairing. The problem is, I cannot get it to connect. I tried connecting to my Sony Vaio's internal Bluetooth, a generic bluetooth adapter and an arduino BT module.

The ListSelection event gets triggered, as I confirmed printing data to the console inside that event. The only problem seems to be the connectToDeviceByName, which produces no results.

As stated, all bluetooth hardware works fine, as does my implementation based on Oscar's solution ( http://webdelcire.com/wordpress/archives/1045 - Thank you, Oscar). But as I mentioned, using Ketai would bring enormous benefits, so I would really prefer to get Ketai to work.

Thanks in advance for your help.

Replies(8)

zimady

Re: Need help with Ketai Bluetooth - SOLVED

1 year ago

Hey schprlock, did you manage to get the Arduino BT module talking to your Android phone using Ketai?

I've got it all set up and they're talking but I'm struggling to make sense of the data I'm receiving from Arduino. If you've succeeded with this, please let me know: I could do with some help :)

scorpi

Re: Need help with Ketai Bluetooth

1 year ago

Hi,
I would use ketai v7 bluetooth to. but I get errors with the BluetoothCursors sample like

No library found for android.content
No library found for android.os

Processing 2.0b3 generates the apk, but at the device I can't get any acces to bt.

can you give me a hint what I must do to find the missing libraries?

I googe for many hours but can not found any solution

thanx

ketai.j

Re: Need help with Ketai Bluetooth - SOLVED

1 year ago

Hello scorpi,

Those are base android libraries. The only time I have seen that error is when a sketch is being run in "Java" mode when it should be in android mode. Perhaps the SDK is not installed properly?

What version of android is your device running? We've tested the new 2.0b3 with our latest library on android v 4.0.4 and 4.1 with no bluetooth issues. Make sure you also have Bluetooth permissions for the sketch as well (which it should for the example bt sketch).

Any additional information you can provide would be helpful.

good luck,

j

scorpi

Re: Need help with Ketai Bluetooth - SOLVED

1 year ago

Hello j,

I have installed android SDK with Versions: 2.3, 4.0 and 4.1. It looks like processing uses the 2.3.3 version. I don't know where I can switch the version to use in processing.

Yes, my sketch is in android mode.

Other examples for android compiles without error. but these source codes doesn't use the import for any android libraries.

Bluetooth Permissions are set for the two bluetooth points and internet access. This is set when I open the Sketch from the examples list.

This I tested on windows 7 64bit with installed 64 and 32 bit java. I use the 32bit version of processing ( because the 64bit version has problems with the serial interface).

I have done a fresh install on a 32bit linux mint. Android-SDK like above, processing 2.0b3 and the ketai library. I get the same hint with issing libraries and the generated apk doesn*t access the bluetooth funktions on my mobile.

I have tested ketai v6 and v7 on both systems. same issue.

Any other ideas?

scorpi

zimady

Re: Need help with Ketai Bluetooth - SOLVED

1 year ago

I also see the same error regards the android libraries but have ignored it so far as it compiles and runs successfully and the bluetooth functionality works as expected.

scorpi, I suspect those errors and lack of bluetooth are unrelated.

I can't be any more helpful than that but I thought you should know that those errors have not caused any perceivable issues for me.

scorpi

Re: Need help with Ketai Bluetooth - SOLVED

1 year ago

I tested my generated apk on my galaxy s3. the app starts and shows the text for pressing the buttons for listing, scan etc bluetooth devices. If I input any key, with ore without cr, it doesn't show any thing new outputs. The initial "using" output is showing and nothing else.

scorpi

Re: Need help with Ketai Bluetooth - SOLVED

1 year ago

It looks like the app doesn't get any keyboard message. I tested on two devices galaxy s3 and htc with android 4.0.x.
If I set the "key" variable in source to 'p', it shows me the paired devices.
But I can't get any keyPressed events.
I connect a usb keyboard with otg adapter, but I can't get any keys to.

The App runs in the keyPressed() event but the "key" value is not correct set.

knuppel

Re: Need help with Ketai Bluetooth - SOLVED

1 year ago

Does anyone have some example code sending bytes from Android to Arduino?

Top Reply