Developing Related
https://www.arduino.cc/
Book and reference
Slideshare
https://www.slideshare.net/VishnumayaN1/iot-fundamentalspdf
Buy on Line
https://www.amazon.com/IoT-Fundamentals-Networking-Technologies-Protocols/dp/1587144565
https://www.tenlong.com.tw/products/9781587144561