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Freestyle Libre sensor not being read correctly

Discussion in 'Type 1 Diabetes' started by brucie75, Oct 7, 2020.

  1. brucie75

    brucie75 Type 1 · Member

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    Hi

    During the last month or so, my Librelink app on my phone has increasingly not been able to take readings from my sensor. I have had used 3 sensors during this time, and have had the same problem in varying degrees with each sensor. Because of this, I have had gaps in the 24-hour graphs on the app. The error messages are either "The smartphone was unable to scan the sensor" (Scan error 335) or "Glucose reading is unavailable" (Sensor error 373). It still takes readings without any problem on occasions though so I know the sensor is still working.

    I replaced my smartphone at the end of August - this does seem to be when the problems started. My previous smartphone was ok. Is it possibly my new phone causing these issues?

    Any thoughts much appreciated.

    David
     
    #1 brucie75, Oct 7, 2020 at 10:52 PM
  2. Rokaab

    Rokaab Type 1 · Well-Known Member

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    Is it an iPhone by chance? I've heard there have been issues caused by the latest updates by Apple.
     
    #2 Rokaab, Oct 7, 2020 at 10:56 PM
  3. Antje77

    Antje77 LADA · Moderator
    Staff Member

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    You might want to try holding a different part of your phone to your sensor.
    Took me a while to find out the best spot fot my phones. With both my Samsungs it worked best when I held the top back flat against it, with my Huawei it works best to press the top end to it.
     
    #3 Antje77, Oct 8, 2020 at 8:40 AM
  4. Bucksgirl

    Bucksgirl · Member

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    Hi David, I had this problem with my iPhone 7, caused by a glitch with the Libre update apparently. Not being funny but have you tried turning the phone fully off and on again? Fixed it for me.
     
    #4 Bucksgirl, Oct 8, 2020 at 10:15 AM
  5. Glucobabu

    Glucobabu Type 1 · Well-Known Member

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    Libre functionality on my iPhone 7 has gone quite haywire over the last month or so. Sometimes it doesn’t scan at all or gives a reading after repeated scans. Often the reading is on the screen but it’s still telling to scan and the ‘ping’ registers after 15/20 seconds delay. The screen flips over 2/3 times showing the same result multiple times. The Libre helpline advised me to update my iPhone which I did but made no difference. It works intermittently and it seems I’ll have to learn to live with this! My guess is Freestyle’s latest update has messed things up for older iPhones!
     
    #5 Glucobabu, Oct 8, 2020 at 10:57 AM
  6. lgrenter

    lgrenter Type 1 · Member

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    I have been having the same kind of problems as you all report. I have put it down to the last apple update. My phone updated before I updated the libre app. Once updated it could not seem to scan the sensor on first try like before. I just press cancel and then it finds it straight away second go! I updated the app thinking this would sort it but it’s still the same. Also notice that sometimes I don’t get a ping or vibration on scan now....shows no reading and then suddenly appears when away from sensor!
     
    • Agree Agree x 1
    #6 lgrenter, Oct 8, 2020 at 5:06 PM
  7. brucie75

    brucie75 Type 1 · Member

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    This does sound quite familiar to the problems I am having. I have a Samsung A20 which, I think, is quite a new phone. Correct me if I'm wrong! My previous phone was a Nokia 5 but I did not have these problems at that time.
     
    #7 brucie75, Oct 8, 2020 at 10:02 PM
  8. brucie75

    brucie75 Type 1 · Member

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    No, it's a Samsung A20e.
     
    • Creative Creative x 1
    #8 brucie75, Oct 8, 2020 at 10:04 PM
  9. brucie75

    brucie75 Type 1 · Member

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    I have a Samsung too but I hold it in the same place every time. Sometimes, it reads the sensor with no problem at all.
     
    #9 brucie75, Oct 8, 2020 at 10:08 PM
  10. Dianemacfaden

    Dianemacfaden Type 1 · Active Member

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    Hi there
    I have been having the same issues recently with my iPhone 7 not reading my sensor like it used to. So many unsuccessful goes before it eventually reads it. I read about the recent update causing issues and have just re booted my phone and now it seems to be ok.
     
    #10 Dianemacfaden, Oct 11, 2020 at 9:50 AM
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