hey ngcc_hk, thanks for the comment! we'll follow up with series of technical on blogposts explaining how we built it (with code examples etc.), this first blogpost was to showcase the project, I'm happy you liked it!

last month Microsoft had July IoT month and published a lot of tutorials on topic how to build similar things, I suggest you check out following link if you want to learn more: https://techcommunity.microsoft.com/t5/internet-of-things/ju... there are examples like "Intelligent home security with Nvidia Jetson Nano" that uses similar concepts. cheers!