QSerialPort alternative for Android?

DoughBoy

Hello,

I've done a lot of searching and it seems there's no easy way to get [QSerialPort] to work on the Android platform. I have a rooted Android device with a built in RS-232/485 port that I would like to use. Is it possible to use something other than the [QSerialPort]? I was thinking that perhaps I could just do a File Open (/Dev/tty) to read/write to the serial port. Sadly, I'm not too sure on the appropriate method of this idea. Any helpful guidance would be greatly appreciated.

Thanks to all for their assistance!

kuzulis

I have a rooted Android device with a built in RS-232/485 port that I would like to use.

If you have a rooted device, then there are no problem (I think) to use QSerialPort (in this case need to run application with the root privileges, or, give a rights for open the tty device for any(?) user).

Otherwise (if you have not rooted device && you have an USB/Serial converter) you can try to use this patch: https://codereview.qt-project.org/#/c/84338/

DoughBoy

Hi Kuzulis,

Thanks very much for your response. Let me explain the situation a bit better. I created an application that uses [QSerialPort], but when I try to compile the application for [Android for armeabi-v7a (GCC 4.9, Qt 5.4.1)] I get an error: [Project ERROR: Unknown module(s) in QT: serialport].
This means my line [QT += core gui serialport] in the .pro file isn't acceptable. When I Google search this error, I find that Qt doesn't support the [QSerialPort] class with Andriod.

Now, I'm looking to see if there's an alternative to the [QSerialPort] that I could use instead.

I appreciate your suggestion, to use the git library of [QSerialPort] for non-rooted/USB serial communication. But sadly, I don't think that applies to my needs, or am I mistaken?

Thanks again!

kuzulis

I find that Qt doesn't support the [QSerialPort] class with Andriod.

You can compile and install QtSerialPort manually into your Android's Qt instance (it is better to use QtCreator for this purpose). For more info see WIKI: https://wiki.qt.io/QtSerialPort

DoughBoy

Hi kuzulis,

Thank you very much for your suggestion. That is exactly what I did - compiled and installed [QtSerialPort] manually and now I have the class available for my Android application. For some odd reason, the building stage didn't complete exactly, so I manually copied over the compiled files to the Qt directory.

{From} ...\QtSerialPort\build\include => Copied [QtSerialPort] to <Qt dir>\android_armv7\include
{From} ...\QtSerialPort\build\lib => Copied [libQt5SerialPort.la; libQt5SerialPort.prl; libQt5SerialPort.so] to <Qt dir>\android_armv7\lib
{From} ...\QtSerialPort\build\mkspecs\modules => Copied [qt_lib_serialport.pri] to <Qt dir>\android_armv7\mkspecs\modules

Even though the working solution doesn't answer my initial question, I do believe this thread has been solved. I am interested to know if I am neglecting something by manually copying over the build files - let me know if you could.

Thanks again!