Yes (with my 735XT) and 520, but only when I was also timing the activity with the 735XT. What I have not tried to fully figure out is how to have the watch's optical sensor in its more continuous activity mode and broadcasting while not timing an activity.

I don't know about the 510 but I broadcast my HR from the 935 to my Wahoo Element Bolt. When doing that the 935 screen shows HR in the middle of the watch face, a couple of symbols at the top (heart and a broadcast symbol) and the time at the bottom. Hope that helps.

on the 735, go to the hr widget. Hold down the up button until you see "heart rate options", select heart options, scroll down to broadcast heart rate, hit start to enter broadcast mode.

---

blog

That only works if you go to settings first and tell it to turn on "Broadcast During Activity" -- otherwise it will work for a little bit and then it will turn off for some reason. I had to call Garmin to figure that bit of information out.

I'd like for the HR to show up (on the 510) - just as it does when I wear a strap.

I don't care what the 935 displays. I'd just like to use it to broadcast my HR to the 510.

**Edit -- OK....if I go through settings, I can get it to broadcast. I don't have the 510 with me to know if it's receiving, though. I'll check, later. Thanks! (and yes....when I'm in this mode, the HR is in the middle of the screen with the time at the bottom of the face).

Settings -> Sensors -> Wrist Heart Rate -> Broadcast HR -> Now

Not the case for the 935 I guess because I certainly didn't do that and was able to successfully record my HR for approx. 5 hrs per day of riding last week for 7 days.

Record on "what"?

On my Wahoo Element Bolt.

There are 2 options under the HR Options. Broadcast Heart Rate and Broadcast during activity on/off. If you just do the broadcast heart rate, you can't do an activity as well. So if you want to record the activity on the 935 and broadcast, turn the broadcast during activity to the On position. Then anytime you start an activity it will be broadcasting as well as tracking the activity.

Ron

In the above scenario, do you have to have the 935 on "bike" mode (as AN example) to record optical HR on say a 510? I actually have no interest in tracking my bike rides on the 935.

No, you don't need to be in any of the sport modes if you only want to broadcast the HR to the 510. Just go into the heart rate options and choose Broadcast Heart Rate. The 935 will then be broadcasting and the screen will only show your heart rate in the center of the 935 with symbols showing that your broadcasting at the top and current time of day at the bottom. The 935 will continue to broadcast until you hit any other button other than the backlight. Once you hit a button it will ask if you want to Exit Broadcast Mode and you can choose yes or no.

Ron

I haven't tried it (while timing an activity), but my findings were the same as yours (without timing an activity with the 935). I was hoping to not have to do that (PITA factor).

I've only been playing with mine for a few days but had trouble pairing when it was in broadcast mode. Paired fine if I did what somebody mentioned above and broadcast during an activity but really don't want to always do that. I think I need to power everything down and try again.

Where do you go on the 510/520 to pair with the watch, to pick up the broadcasted HR from the 935?

I'm not sure it's necessary, but I did a search for new HR sensor on the 510 (just like if you were going to add a new strapped sensor). It took a couple seconds).

That's what I did (or at least tried to do) as well.

Maybe stating the obvious but make sure you're in broadcast mode on the 935 when searching for the HR Device. Then you should be able to search/add a new device. I didn't have any issues doing this on a 520.

Ron

While everyone is discussing whether or not it will work...just a quick note on whether it will work well.

I have a 735 and a 235 before that. I used the broadcast function many times and it broadcasts a HR, but it's more often than not cadence locked or just overly bouncy. I went back to a scosche since that is way better. Perhaps its the magical yellow LED or reading above the bicep instead of the wrist...I don't know...but it is actually useful data.