@duane: check out the you-tube video of a guy who wanted some sheet music. Wrote a program to see the holes and convert it from the video. I suspect it works similar to my scanner. (which was and is a decade old open source hardware project.)
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.