HRV data with FR245 and HRM-Pro

many newer Garmin watches have a setting called "log HRV" that has to be enabled under "physiological metrics"

Garmin destroyed the FirstBeat site just like they destroyed the forums here when they redid them, not giving a damn about lost knowledge but there  used to be a hidden way for older Garmin  watches to enable HRV logging by putting a tiny special FIT file into \GARMIN\NEWFILES on the watch

http://google.com/search?q=cache%3Ahttps%3A%2F%2Fsupport.firstbeat.com%2Fhc%2Fen-us%2Farticles%2F360015729193-How-to-Set-on-the-RR-recording-for-Older-Garmin-Devices

mirror: https://archive.is/xAWXW

the file used to be here but is now gone:

https://www.firstbeat.com/app/uploads/2015/10/enable_hrv_settings_file.zip

so you have to search google for enable_hrv_settings_file.zip

I have this file and it's this simple, only 38 bytes and just flips on one hidden setting for firstbeat features

***** enable_hrv_settings_file.fit *****
File size: 36 bytes, protocol ver: 1.00, profile ver: 1.50
File header CRC: 0xC104
file_id (0, type: 0, length: 2 bytes):
  type (0-1-ENUM): settings (2)
hrm_profile (4, type: 0, length: 2 bytes):
  log_hrv (2-1-ENUM): 1
CRC: 0x7CC1
***** enable_hrv_settings_file *****