Yesterday, while googling around to gather clues for reverse-engineering the protocol for a Garmin smart watch, I stumbled upon an e-mail on a listserv, discuss

Yesterday, while googling around to gather clues for reverse-engineering the protocol for a Garmin smart watch, I stumbled upon an e-mail on a listserv, discussing pieces of Garmin BT communication. Only after a while I noticed it had been written by Linus, who apparently worked on diving software. Now this appears on HN frontpage. I wonder what prompted the OP...