Reproducible
engineering
experiments

Test and debug USB to RS-232 serial adapters on Linux: identify /dev/ttyUSB0 nodes via dmesg & lsusb, loopback test with picocom, minicom, or screen.

Install Arduino IDE on Ubuntu Linux: download AppImage / Flatpak binaries, add dialout group permissions for ttyUSB/ttyACM, and configure board managers.

Implement MaterialDatePicker in Android using Kotlin: build birthdate pickers, set DateValidator constraints, handle UTC timestamps, and style themes.

Add vector icons to Android TextView using compound drawables: master drawableStart, drawablePadding, tint colors, and programmatic Kotlin APIs.

Create equal width or height buttons in Android LinearLayout: master layout_weight=1, set layout_width=0dp, and build responsive UI layouts in XML.

Run an interactive Ubuntu shell inside Docker: master docker run -it ubuntu bash, mount volume directories, install packages, and manage lifecycle.

Fix ADB INSTALL_FAILED_TEST_ONLY installation errors in Android: use adb install -t flag, disable android:testOnly in AndroidManifest.xml, or update Gradle.

Debug Android Fragment lifecycle crashes, IllegalStateException, and state loss: master FragmentManager.enableDebugLogging(), FragmentStrictMode, and callbacks.

Enable ALOGV verbose native logs in Android C/C++ HAL layers: set LOG_NDEBUG 0, configure setprop log.tag.<TAG> VERBOSE, and inspect Android Logcat.