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Re:The Untold History of Arduino (2016) by opencl on Sunday March 17, 2019 @03:04PM (#19415745)
You're not forced to use it and it's not a blob[1].

[1] https://github.com/nodemcu/nodemcu-firmware

Re:The Untold History of Arduino (2016) by swiley on Sunday March 17, 2019 @03:11PM (#19415813)
Just looking at that briefly it looks like there are still closed source components. (although they might not be part of the RTOS so I might have been wrong about that)