@bobo -- the problem is no different working with embedded microcontroller systems. If there is no trace and debug capability, no access to source code, you have very limited observations to make. Unless the debug was built-in, you are out of luck.
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.