In their stated plans, it appears as if older iPhones than a 4S are screwed and Android is a mess without Bluetooth until an upcoming release.
With the Android mess, you have to question these engineers' business strategy in not supporting older iOS hardware and s/w, perhaps back to the "3".
Billions not served.
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.