Merge commit '4570dfa2016fa32b6f7b29aabadb9d708482b94d' * commit '4570dfa2016fa32b6f7b29aabadb9d708482b94d': docs: add the Bluetooth developer guide,
Merge commit '4570dfa2016fa32b6f7b29aabadb9d708482b94d' * commit '4570dfa2016fa32b6f7b29aabadb9d708482b94d': docs: add the Bluetooth developer guide,