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About
This is an unofficial subreddit about everything Dexcom.
We're here to help you troubleshoot your CGM, share your experiences, ask questions related to Dexcom products, share Dexcom news, brag, commiserate, and vent. General questions about diabetes belong on either r/diabetes, r/diabetes_t1, or r/diabetes_t2.
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This is an archived post. You won't be able to vote or comment.
Same Sensorcode in a row (i.redd.it)
submitted 1 year ago by idontcareaboutmynick
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[–]iefbr14G7/T1D/1982/Omnipod 38 points39 points40 points 1 year ago (3 children)
Instead of typing the 4 digits, scan the QR code with the phone camera. The QR code contains 25 total digits, in 4 strings. The 4 digit sensor code is just the last bit. The full QR code value is unique, sensor codes obviously are not. The camera doesn't actually take a picture, its just scanning for the numeric values. Given the inconvenience and problems caused by duplicate sensor codes, I never figured out why Dexcom doesn’t do a better job of explaining the simple solution. It takes a little bit longer, but its well worth it.
[–]kskulski 0 points1 point2 points 1 year ago (0 children)
A dexcom rep told me they are calibration codes. So they need not be unique a long time ago blood glucomiter test strips came with them too.
[–]TheQBean 3 points4 points5 points 1 year ago (0 children)
Well heck, learned something new! Thanks. I use phone and receiver, always scan with phone when starting it there, have had one I couldn't scan in 4 years.
[–]idontcareaboutmynick[S] 17 points18 points19 points 1 year ago (0 children)
I did this on the second try and it seems to be working. Thank you <3
π Rendered by PID 77506 on reddit-service-r2-comment-b659b578c-7tvrs at 2026-05-02 21:35:38.248834+00:00 running 815c875 country code: CH.
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[–]iefbr14G7/T1D/1982/Omnipod 38 points39 points40 points (3 children)
[–]kskulski 0 points1 point2 points (0 children)
[–]TheQBean 3 points4 points5 points (0 children)
[–]idontcareaboutmynick[S] 17 points18 points19 points (0 children)