Originally Posted by
hammond9705
I’ve found that the secret to connecting DI2 is to wake it up before turning on the Garmin. Bike is usually in the big ring and I hit the lever to shift up, and the DI2 just clicks, but wakes up. Then it connects right away when the Garmin turns on
Or just hit the hidden buttons on the top of the STI's. I have mine set to page the Garmin display forward or backward depending on which STI I press. For those with 8000 series Di2, you have to have the d-fly unit to give the wireless Ant+ signal for the Di2 to be able to pair with the Garmin.
By using them I don't put additional wear and tear on the RD or FD by having it shift when the sprockets are not turning.
The really old Di2 didn't have the hidden buttons on the top of the STI's. I'm not certain if all versions of the newer Di2 have them either.