Thanks to remotexy, i can finished my project faster and not spend too much time in UI-Android apps programming environment, instead i can concentrate more on the way servo arm reacted with input given. like speed, encoder value, gap between signal stop to position when servo actually stop, any mechanical related, etc.

i even doing some tweak and modifiying source from example according to my need. the result is on this video https://www.youtube.com/watch?v=HTlqXI7fQXY

Again, thanks to remotexy for beautiful solution as an interface maker.
everything you need is available here, source, lib, examples. this is a complete solution.

And i said that on a point when remotexy can only support bluetooth. now, internet, wifi... wow.
Thanks developer.

ps: i did buy the app. and appreciate so much when remotexy change from trial limited time method to limited component. brilliant.

extra: i am sorry i cant share my source code for that UI since its related to the national research company where i did the project. and, also i am sorry for my english.
best regards.