The licensing is a bit poor. While openthread is open source, and the spec is public: > "Membership in Thread Group is necessary to implement, practice, and shi

The licensing is a bit poor. While openthread is open source, and the spec is public: > "Membership in Thread Group is necessary to implement, practice, and ship Thread technology and Thread Group specifications."[1]. This seems to be a similar limitation to what prevents Zigbee from being in the Linux kernel, as commented elsewhere[2] in this thread. In contrast, the Bluetooth SIG only requires a fee to be paid when you actually ship, as a once off not a yearly fee. The cost is roughly similar. [1] https://www.threadgroup.org/ThreadSpec https://www.threadgroup.org/ThreadSpec [2] https://news.ycombinator.com/item?id=21825822 https://news.ycombinator.com/item?id=21825822