How to Connect Dexcom to a Secondary Glucose Display

Help → CGM Connections → Dexcom

Safety note: Secondary displays are supplemental. Always rely on your primary CGM app/device for treatment decisions and alerts.

Using Glucose Display?

Here’s exactly what to do to connect it. Go to the product page.

Last updated: Feb 2026

Quick checklist (top gotchas)

  • Dexcom app shows current readings.
  • Dexcom Share is enabled.
  • At least one Share follower is accepted.
  • Phone has reliable internet + background data allowed.
  • Device time/timezone are correct.

What you need

  • A Dexcom CGM (e.g., G6/G7) paired to the official Dexcom mobile app.
  • The phone running the Dexcom app must have a reliable internet connection so it can upload to Dexcom’s servers.
  • Dexcom Share enabled (see below).
  • At least one Dexcom Share follower configured (you can invite yourself). This is a common “looks fine on the phone but the external display shows no data” failure point.

Step-by-step setup

  1. Verify the Dexcom app is receiving readings. Confirm you see current glucose readings in the Dexcom mobile app.
  2. Enable Dexcom Share. In the Dexcom app, find the Share / Connections section and turn Share ON.
  3. Add at least one follower. Invite a follower (many users invite an email they control). Ensure the invite is accepted in the Dexcom Follow app.
  4. Sign in to your secondary display/app. Use your Dexcom account credentials (the same account used by the Dexcom app/portal). Use the primary Dexcom account, not a follower’s login.

Troubleshooting (most common issues)

  • “No data” but phone is fine: confirm Share is ON and at least one follower is accepted.
  • Credentials rejected: confirm you can log in to Dexcom on the web with the same username/password.
  • Delayed or missing data: check the phone has internet and Dexcom is allowed background data (battery optimization can break uploads).
  • School/work Wi‑Fi blocks data: restrictive networks can interfere with real-time upload and follower fetch.

See the Troubleshooting hub for cross-provider fixes.

FAQ

Do I need Dexcom Follow?
You don’t need to “use” Follow daily, but having at least one accepted follower is often required for secondary displays that rely on the Share pipeline.

Still stuck? We can help.

Contact support at our support page and include:

  • CGM source (Dexcom)
  • Symptom (no data, login error, delayed readings)
  • Phone OS/version
  • Network type (home Wi‑Fi, school Wi‑Fi, cellular hotspot)
  • Screenshot (if possible)

Disclaimer

This content is educational and for device setup support. It’s not medical advice. Always follow your CGM manufacturer’s instructions and rely on primary CGM alerts and guidance for treatment decisions.