There are a couple of errors in the article. References to 33W resistors should of course be 33Ω - the symbol font in my Word doc got ignored. And the schematic shows these as 39Ω - which is what I think I eventually used - they give a slightly lower charge rate of 62 - 23 mA.
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.