In the near future, I do not plan to develop the project for other types of coins. In the first steps I want to add more hardware and focus on the appropriate parameters of this stuff.
Adding other coins is an interesting idea, but I would have to find the right balance between the amount of content and the simplicity of the application. However, the idea is worth considering. Thank you.
PS. I invite you to the discussion here -
https://bitcointalk.org/index.php?topic=3719297. I created this topic by mistake, so I will close it to not duplicate the content.