This article mentions using PWM for dimming of LEDs and some readers may think that they could use the same technique to do colour control. But there has been a long standing issue with Colour Kinetics (now part of Philips) having patents on such applications, despite PWM being used for years prior to the patent.
Those interested can find a summary at http://www.ledsmagazine.com/news/5/3/7 and http://forums.auschristmaslighting.com/index.php?topic=894.0
What are the engineering and design challenges in creating successful IoT devices? These devices are usually small, resource-constrained electronics designed to sense, collect, send, and/or interpret data. Some of the devices need to be smart enough to act upon data in real time, 24/7. Specifically the guests will discuss sensors, security, and lessons from IoT deployments.