IoT connectionWhere IoT solutions really come into play: Connectivity. At this point, devices communicate with each other and we start to see a connected ecosystem taking shape.The technical challenges of building connected products are even more difficult. Of course, we still need all the expertise from Stage 1 and Stage 2, but now we need a higher skill level to be successful.We asked CAN2.0 Communication Module a lot about our connected devices, but these embedded systems work on constrained hardware. Integrating various services, especially when their starting points are so different, is a significant hurdle. Security has become more difficult, and we really need to think about building security from the start; for example, we want to embed hardware security module (HSM) chips into our circuit boards.One of the most complex parts of IoT development is making every bit count. While more powerful computers can afford to dedicate a little disk space or processing power to applications that are just nice to have or not necessary at all, IoT devices lack that luxury.That's why a tool DC-DC isolation type like Nerves is so useful: it allows us to build a custom Linux system that only has what we need and nothing more. However, really knowing what to include and what to remove requires a lot of technical knowledge.