[SOLVED] Qserialport in QT 5.3 running in Android !!!!

projetoslinux

Hi
thank you for all
thank you mr_wallit and kuzulis

i have partial sucess !!

testing with terminal example in qt3.0 to recieve serial data in usb

for this i create in /sdcard/folders and change in source code and compile this directories in qserial_port_unix
its possible create this in execution mode !!

#ifdef Q_OS_ANDROID

    << QStringLiteral("/sdcard/data/lock")
    << QStringLiteral("/sdcard/data/locks")
    << QStringLiteral("/sdcard/data/spool/locks")
    << QStringLiteral("/sdcard/data/spool/uucp")
    << QStringLiteral("/sdcard/data/tmp")
    << QStringLiteral("/sdcard/data/local/tmp");
    qDebug() << __LINE__ << __FILE__;

#else

no more message not LOCK

but when i open serial port show message

error permission denied OK

in debug lines have

Debugging starts
E/SELinux (15962): Function: selinux_android_load_priority [0], There is no sepolicy file
E/SELinux (15962):
E/SELinux (15962): Function: selinux_android_load_priority , loading version is VE=SEPF_SM-N900_4.3_F023
E/SELinux (15962):
E/SELinux (15962):
E/SELinux (15962): selinux_android_seapp_context_reload: seapp_contexts file is loaded from /data/security/spota/seapp_contexts
D/dalvikvm(15962): Late-enabling CheckJNI
D/dalvikvm(15962): GC_FOR_ALLOC freed 187K, 19% free 15034K/18436K, paused 14ms, total 14ms
I/dalvikvm-heap(15962): Grow heap (frag case) to 20.069MB for 2359312-byte allocation
D/dalvikvm(15962): GC_FOR_ALLOC freed <1K, 17% free 17338K/20744K, paused 18ms, total 18ms
D/dalvikvm(15962): Trying to load lib /data/data/org.qtproject.example.serialMaster/lib/libgnustl_shared.so 0x42969fa0
D/dalvikvm(15962): Added shared lib /data/data/org.qtproject.example.serialMaster/lib/libgnustl_shared.so 0x42969fa0
D/dalvikvm(15962): No JNI_OnLoad found in /data/data/org.qtproject.example.serialMaster/lib/libgnustl_shared.so 0x42969fa0, skipping init
D/dalvikvm(15962): Trying to load lib /data/data/org.qtproject.example.serialMaster/lib/libQt5Core.so 0x42969fa0
D/dalvikvm(15962): Added shared lib /data/data/org.qtproject.example.serialMaster/lib/libQt5Core.so 0x42969fa0
D/dalvikvm(15962): Trying to load lib /data/data/org.qtproject.example.serialMaster/lib/libQt5Gui.so 0x42969fa0
D/dalvikvm(15962): Added shared lib /data/data/org.qtproject.example.serialMaster/lib/libQt5Gui.so 0x42969fa0
D/dalvikvm(15962): No JNI_OnLoad found in /data/data/org.qtproject.example.serialMaster/lib/libQt5Gui.so 0x42969fa0, skipping init
D/dalvikvm(15962): Trying to load lib /data/data/org.qtproject.example.serialMaster/lib/libQt5Widgets.so 0x42969fa0
D/dalvikvm(15962): GC_CONCURRENT freed 11K, 17% free 17336K/20744K, paused 5ms+9ms, total 31ms
D/dalvikvm(15962): Added shared lib /data/data/org.qtproject.example.serialMaster/lib/libQt5Widgets.so 0x42969fa0
D/dalvikvm(15962): No JNI_OnLoad found in /data/data/org.qtproject.example.serialMaster/lib/libQt5Widgets.so 0x42969fa0, skipping init
D/dalvikvm(15962): Trying to load lib /data/data/org.qtproject.example.serialMaster/lib/libQt5SerialPort.so 0x42969fa0
D/dalvikvm(15962): Added shared lib /data/data/org.qtproject.example.serialMaster/lib/libQt5SerialPort.so 0x42969fa0
D/dalvikvm(15962): No JNI_OnLoad found in /data/data/org.qtproject.example.serialMaster/lib/libQt5SerialPort.so 0x42969fa0, skipping init
D/dalvikvm(15962): Trying to load lib /data/data/org.qtproject.example.serialMaster/qt-reserved-files/plugins/platforms/android/libqtforandroid.so 0x42969fa0
D/dalvikvm(15962): Added shared lib /data/data/org.qtproject.example.serialMaster/qt-reserved-files/plugins/platforms/android/libqtforandroid.so 0x42969fa0
I/Qt (15962): qt start
D/dalvikvm(15962): Trying to load lib /data/app-lib/org.qtproject.example.serialMaster-1/libserialMaster.so 0x42969fa0
D/dalvikvm(15962): Added shared lib /data/app-lib/org.qtproject.example.serialMaster-1/libserialMaster.so 0x42969fa0
D/dalvikvm(15962): No JNI_OnLoad found in /data/app-lib/org.qtproject.example.serialMaster-1/libserialMaster.so 0x42969fa0, skipping init

1- No JNI_OnLoad found in
its normal ???

2-my phone is rooted and add manifest.xml to write sdcard.
how to execute in sudo ?

3- other git examples not work for me !!!

thanks..for this

projetoslinux

3- other git examples not work for me !!!

change permission in host machine
sudo chmod 777 -R /libs/armeabi-v7a/

mr_wallyit

Hello,
" JNI_OnLoad found" i see the warning in the my project.
If you receive the bytes you can open the serial port,
Are you sure, that are you sending the commands correctly?
Because all device have the specific syntax, i thinks that if you can receive you can send

I don't know how you we open the app with permission "sudo", but i have found how open by shell.

@
adb shell am start -n org.qtproject.example/org.qtproject.qt5.android.bindings.QtActivity

@

projetoslinux

ok thanks
mr_wallyit

kuzulis

In addition, seems, there are "way":https://groups.google.com/forum/#!topic/pico-sam9g45/dNt1FJCX6ik to open the serial port with the user permissions.

Need to setup permissions to desired serial port, e.g. do it in "init.rc" file, e.g.:

@chmod 0666 /dev/ttyS0@

Of course, to changing of this file required the root rights, unfortunately. But it can be done once for all non-USB serial ports "integrated" on Your device and do no worry in future.

mr_wallyit

Hi kuzulis,

good research.

Thanks

projetoslinux

After several weeks I found out why qtserialport not run on any android

1 - Root is necessary
2 - Android Kernell should be compiled with the option enabled serial port, as well as some needed to install libusb and having to recompile the source code Kernell!!

Much work!!
Anyone know another method??

mr_wallyit

Hello,

I have tried qserialport on industrial pos (point of sales),so i thinks the kernel has enabled serial port and libusb, because i can use the serial port.

In the Qt 5.3 we have bluetooth,
Why Don't we use bluetooth?

@
http://www.brainboxes.com/product/bl-830/bluetooth-to-rs232-serial-adapter-1-port-female
@

I don't have tried, but i thinks that work because android uses protocol bluetooth with adapter than it convert the signal in rs232.

What do you thinks?

projetoslinux

Thanks mr_wallyit

i testing but not have any example whit serial com over bluetooth

looking this

http://qt-project.org/forums/viewthread/41978/

mr_wallyit

Dear projetoslinux,

if we use a adapter, the protocol between smartphone and the adapter is bluetooth, the conversation rs-232 is done by converter.

e.q. in qt:
/opt/qt/Examples/Qt-5.3/bluetooth$ ls
btfiletransfer
picturetransfer
scanner
btchat
btscanner
pingpong

I thinks that the pingpong is a type of communications network client - server. I like this idea but adapters bluetooth are very expensive for me, i search a economic device on ebay. I need a lot of time for try.

projetoslinux

Hi mr_walyit

im a testing in embedded android solutions and work fine, but in my cell phone, not work, in next week i compile phone kernel. adapters is most expensive !!! and dont resolve portability
thanks...

mr_wallyit

Hello,

Have you compiled Kernel?

My best regards