Getting j2mod/jSerialComm to work on Android

[Play3r21]

Has anyone been able to successfully get j2mod and its dependency jSerialComm to work on Android? I'm facing the same issue that the users in jSerialComm's issues thread 45 were facing. I've been searching for an answer for more than a week and have gotten nowhere.

I've tried the following (plus many others, all of which did not help):

• Google's Add Build Dependencies, which consisted of me placing the JARs for j2mod, jSerialComm, and slf4j into my project's app/libs/ directory. I also tried removing the jSerialComm JAR and adding it's Gradle dependency directive for Maven, compile 'com.fazecast:jSerialComm:1.3.11'.
• The marked solution in this Stackoverflow post on how to include .so files (which I tried to do instead of using the jSerialComm JAR file)
• The marked solution in this Stackoverflow post on getting jSerialComms to work in Android

I'm working with a device running Android 5.1.1 (API 22) on an ARM Cortex-A9 SoC with 5 physical serial ports, labelled ttyAMA0 through ttyAMA4 in /dev/. SELinux is set to Disabled.

I know that this question is better suited for the jSerialComm issues threads, but it's already been asked there and no one has provided a viable solution.

Thank you very much for the help.

[steveohara]

You are correct, this question isn't suitable for this forum, howerver...

The serial comms is abstracted in j2mod (AbstractSerialConnection) so if you can't find a workaround, you could always implement your own serial connection using an Android compatible library. Take a look at the ModbusSerialMaster to see how to use your own comms connection.

[orensharon]

This is the correct answer to make it work on android device: https://github.com/Fazecast/jSerialComm/issues/36

• Clone jSerialComm to your pc.
• Edit the code as @adryx92 said in the above link.
• Inject this jar to j2mod lib and create new jar of j2mod.
• Add j2mod jar to Android project.

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To inject jSerialComm to j2mod remove jSerialComm depenedency from j2mod's pom.xml file and import jSerialComm.jar from the resource folder

Make sure maven doesn't import the source from .m2 library. I had to delete jSerialComm from .m2 folder to make it work. You also need to copy all the files from jSerialComm.jar/Android to jniLibs folder in your androids project.

For build jSerialComm lib I used eclipse (it didn't work with intelij) with:

• Java 1.6 (didn't work with Java 1.8)
• Gradle 3.5

One more thing is to give root access to the serial port in the Android device (you can take a look at this :https://github.com/chrisdew/android-serialport-api/blob/10cb9c4d6dd7e4357473d1438530dd5639eb5e12/android-sercd/project/src/gnu/sercd/Sercd.java#L69)