We have revamped the GPL V3 licence to make it easier for you to build applications using Pycom boards WITHOUT having to share the code or indeed make the application source code available to others.
There is a comprehensive FAQ which can be found here: https://github.com/pycom/pycom-micropyt ... 20v2.2.pdf
In essence the rule is the following:
For customers building an application using a Pycom Board: You can do what you want with the application and decide to close source / Open source. You do not need to share the code.
For customers interested in ONLY using Pycom firmware on NON-Pycom boards then you can do so without requiring a license from Pycom however you will need to comply with the obligations of GPL V3 which means making the source code available etc. There are also some legal requirements around acknowledgements of other licensees whose firmware we have used such as Espressif, TI etc. Should a customer in this scenario choose to close source the application then that is possible however they must enter into a separate licence agreement with Pycom.
I hope that clarifies the licensing aspect however feel free to shoot over more questions etc.