Name: Di2 Field — Edge Explore 2
Rating: 4.3 (3 reviews)
Author: lapshin_sp

Di2 Field puts your current Di2 rear gear (e.g. 5•12) and the wireless unit battery level on your Edge data screen. It connects over Bluetooth Low Energy — no ANT+ needed.

There is no button to press: add the field to a data screen, tap any shifter to wake the Di2, and the field finds it and connects on its own. It then sticks to that unit and reconnects automatically on every ride. A colour-coded dot shows the state: blue searching, yellow connecting, green connected, dark blue locked onto your Di2, orange retrying.

WHAT IT SHOWS
- Rear gear as large numbers, a cassette graphic, or both
- Front chainring indicator for 2x/3x
- Di2 battery as a percentage, a colour-coded icon, or both
- Day / night theme, six languages (EN, FR, ES, RU, DE, AR)

SETTING UP YOUR DRIVETRAIN
Pick a built-in Shimano preset for your chainrings and cassette (e.g. 50-34, 11-34, 10-51), or choose Custom and enter the teeth by hand.

RECORDS TO YOUR ACTIVITY
Per-second gear, teeth, ratio and battery, plus a ride summary: highest rear gear, maximum ratio, lowest battery and shift counts. Visible in the Connect IQ section of the activity.

SWITCHING BIKES
Turn on "Forget paired Di2" in the field settings — the field drops the current unit and locks onto the nearest awake Di2 on the next scan.

TESTED SETUP
Built and tested on my own bike: Shimano XT Di2 RD-M8250-SGS (12-speed) with a Garmin Edge Explore 2. Other Di2 series that broadcast the same Bluetooth data should work too, but I cannot verify them myself.

IF SOMETHING DOESN'T WORK
Turn on "Diagnostics overlay" in the field settings. The field then shows a technical screen instead of the normal layout — connection state, the detected model and the raw data from your Di2. Send me a photo of that screen and I can tell what is happening on your setup, and often add support for it.

Known issue: on Edge Explore 2 firmware 31.33 the device itself refuses to register the Bluetooth service the Di2 uses, so no third-party app can read gears (the battery still works). Reported to Garmin and acknowledged (CIQQA-4662), waiting for a firmware fix. Firmware 30.23 is unaffected.

Independent, unofficial app — not affiliated with or endorsed by Shimano.