Dexcom Setup Step 3: Prepare and apply your Dexcom transmitter

If you use the Freestyle Libre CGM, navigate to Setting Up Your Levels with FreeStyle Libre CGM.

Overview:

Here’s how to prepare and apply your Dexcom transmitter, which sends CGM data to your phone through Bluetooth.

How to prepare the Dexcom transmitter:

Find the 6-digit number on your Dexcom G6 Transmitter Box. If the number is blocked by the prescription sticker, you can find the 6-digit number on the transmitter itself.

2. In the Dexcom app, enter the 6-digit transmitter number. You can do this manually or take a photo with your phone. This step allows for a Bluetooth connection with the Dexcom transmitter and your phone.

How to apply the Dexcom transmitter:

Remove your transmitter from the box.
Clean the back of the transmitter with the provided alcohol wipes and let it dry.
Slide the tab into the slot (see video below).
Press down firmly on the larger end until it clicks into place.
Set up the transmitter:
1. Open the Dexcom app on your phone.
2. Select Next then Yes to confirm.
Accept the Bluetooth Pairing Request on your phone to connect your transmitter. Note: Dexcom G6 transmitters connect, send data, and disconnect every 5 minutes. The pairing in your phone’s Bluetooth settings will say “not connected;” this is expected.
Select Start Sensor to begin your 2-hour CGM warm-up. During this time, keep your phone in the same room as you, within 20 feet of your transmitter.
After the warm-up is complete, you’ll receive a confirmation. You’ll now be able to see your glucose readings!

Tip: To clear expired transmitters from your phone's Bluetooth memory:

Open the Dexcom app.
Select Settings.
Find Transmitter to see the last two characters of your current transmitter code.
In your phone’s settings, delete any devices that do not match the last two characters of your current transmitter code

Dexcom Setup Step 3: Prepare and apply your Dexcom transmitter

Overview:

Once you applied your Dexcom transmitter, select Step 4 below.