Client side has been a solved problem for ages. It doesn't matter much what embedded platform you use for your device and there are hundreds to choose from, wi

Client side has been a solved problem for ages. It doesn't matter much what embedded platform you use for your device and there are hundreds to choose from, with most open source. The real IOT challenges are all in the backend: protocols, storage, API's, user interfaces, aggregation, scripting, events, machine learning, provisioning, security, federation, SaaS, etc etc. Most especially, you have to do some of that stuff at the scale of millions of devices all talking to you at once. AWS and Azure are not that, not yet anyway.