Add jetbrains post link.

visca_controller/README.md

@@ -1,2 +1,6 @@
 To work on this code in the standard Arduino code editor, rename `src` directory to `visca_controller`, then rename
 `visca_controller.cpp` to `visca_controller.ino`
+
+See Jetbrains post about using PlatformIO and CLion for doing Arduno development:
+
+https://blog.jetbrains.com/clion/2020/08/arduino-from-hobby-to-prof-p1/