Speed Sensor 2 & VivoActive 3 Compatibility


New to the Garmin online community so I hope this isn't a dumb question.

I have a spin bike I have put my Speed Sensor 2 on. I use my Vivoactive 3 to track my vitals but I am trying to gain some more stats to help my training. Distance/speed/pace would be real helpful. I have both devices connected on my Garmin Connect app on my iphone. Yet I cannot get any data from the speed sensor. Is there a compatibility issue between the speeds sensor and my watch? I see a red light blink on the speed sensor when I pedal.

I consider myself fairly techno savvy but in this case I cannot figure it out. I need help.

Thanks in advance for any and all help. It is appreciated.

Warm Regards - Jim