I've heard about GymKit since watchOS 4.1 in October 2017, but no one actually enters. If possible, I'd love to do some cardio machines to be compatible with this technology. At first glance, it only needs to add some nfc and became old cardio machines, and only one thing I need is the API (it only works for mfi program members). Homekit Api is also not publicly available, but we have homebridge, so I hope.
So, any idea?
(gymkit is a platform that enables bidirectional synchronization between Watch and compatible cardio machines)