We @Elkrem.io built a bitcoin library -AKA Koyn- with a simple and easy to use API that allows you to connect your hardware with the bitcoin network.
You can find the library here
We also built a vending machine that accepts bitcoins you can check our tutorial here!
Also, we are building a blockchain development board that will allow makers to connect their projects with the blockchain technology easily.
We are eager to hear your feedback about the library and your thoughts about the development board.