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Developers of today have to be able to deal with a large number of devices and programming languages. Over the past few years the way we use computers and devices has fundamentally shifted; but many companies are struggling to keep up with this change. Today, network connectivity is expected in any reasonably priced device. Often putting companies unused to such development in a difficult position.
I will say upfront that I do not work in the IoT or embedded domain, by day I am a Java/TypeScript/C++ software developer in financial services and these libraries are my hobby. I hope you enjoy using them, and that they are useful for you. But before going further, please understand my view point on this.
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More background on this: Experienced network communication consultant
Don’t think Arduino is up to use in commercial products then consider Arduino for your next product
There is a common misconception in the electronics industry that Arduino is unsuited for professional development. As a result many companies try to use different, far more complex tool chains to develop software with far fewer ready made libraries available. What I would recommend however, is to carefully check all libraries that you are using, to ensure their license is OK for you project. Basically, for any commercial development where you intend to keep the source closed, do not use any GPL libraries (LGPL is fine as it has a linking exception).
I specialise in multithreaded network programming and embedded C++; with in excess of 20 years experience writing applications in both Java and C++. Having spent many years writing systems that need to communicate using differing protocols, often for exchange connectivity we are familiar with many topologies. In terms of multithreaded development we have built systems with low latency requirements using various methodologies. More recently using non locking bus style designs such as message bus, chronicle and disruptor.