My Garmin "premium (soft strap) HRM" doesn't always pair with my 935 quickly. Since the oHRM isn't always reliable, I'd like to know the watch is pulling HR data from the strap rather than the optical sensor before starting my activity. (Without trying to look under the watch to see if the LEDs are on.)
Is there a way to force the 935 to vibrate/sound when it pairs or unpairs with an external ANT+ device?