For the Android AR app, I used Unity and C# to programming it, and there's not much resources for connecting Unity project to a Particle Photon through Internet, and that part is the most difficult one. So I looked up the Particle example of sending a web request to particle and use the similar way, send a form through C# code using Unity Web request to realize the Internet communication.
The image recognition and augmented reality part, I also used Vuforia, which is a marker based AR SDK. I already had a lot experience with that, so it doesn't take much effort.
The final app is built into a Android App, deployed on my Pixel Phone.
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