G7 erratic behaviour; defective sensors? bluetooth interference?

[dagord]

Hello, I recently switched to Dexcom G7 after having happily used G6 with xDrip for a couple of years on the same phone as now (Xiaomi Redmi note 10)
First of all, let me clarify I'm currently running the last nightly version (2024.04.19) and I'm using the
settings suggested

The first sensor worked fine without noticing any relevant issue until its expiration.

The second sensor gave me a lot of problems!

• after the warmup, which I did on evening, it started returning values every 15 minutes; only on the following morning I got it working as supposed (reading every 5 minutes) without any intervention
• But almost every night, even if at a random time, the 15 minutes issue came up again during the night; once I could fix it forcing a new pair request (forget the bluetooth device -> changing the transmitter id -> insert correct trasmitter id -> pair device again); another night I had to toggle the "avoid scanning" option
• This night I was so frustrated that I decided to remove the sensor and to start a new one.

So now I'm with my 3rd sensor; it worked fine until this afternoon: I went away from my smartphone for 30 minutes and when I come back the 15 minutes thing came up again!
This is an extract from my logs:

So I decided to test the trasmitter signal with BLE Scanner; both the transmitters (the new and the old, that was near to me and wasn't expired yet) were correctly found but even when "clear and bold" the values were not returned to xDrip; suspecting an interference with the old sensor I moved it to another room and the issue disappeared!

So, coming back to the original issue: why am I experiencing those disconnections during nightime?
I keep my supply of sensors in the bedside table, but I don't think they're causing interference since they're still sealed and not activated.
It was a sensor issue for sure or is there something I can do to investigate further?

I'm asking this because I experienced an identical issue with my old G6 transmitter: after an Android 13 update it started returning values every 15 minutes, but the issue affected only xDrip; the workaround was to use the BYODA Dexcom app and xDrip in companion mode. Eventually, the issue disappeared after an xDrip update.

[Navid200]

Xiaomi is a known problem phone.

This is what is recommended for all phones that experience intermittent connectivity:
https://navid200.github.io/xDrip/docs/Intermittent.html

I had occasional disconnects myself with G6 and a Motorola phone until I got a Pixel phone about 9 months ago.
Since then, there has been no disconnects. I have been using G7 for the past 6 months.

Since you have not posted a screenshot of your status page, I cannot make any other suggestions.

[Navid200]

You can see the timestamps in the data table: https://navid200.github.io/xDrip/docs/Datatables.html

It is great to know that disabling minimize scanning improves performance. Keep an eye on battery consumption.

xDrip updated the timestamp to when receiving data off grid, which made sense for a G6 because that only happened when switching to a new transmitter.
With G7, G7 starts transmitting once a minute instead of once every 5 minutes after about 15 minutes of disconnect.
xDrip incorrectly updated the timestamp then. This is incorrect because G7 only deviates when there is a disconnect but the effective grid remains at once every 5 minutes.

This change in behavior from G6 to G7 needs to be accommodated in xDrip, which we are working on.
So, there will be an update to xDrip to address this so that the timestamps are not shifted around every time G7 goes to the once a minute transmission.

[dagord]

I haven't experienced any noticeable battery drain on the smartphone so far.
Or are you referring to the sensor life expectation?

[Navid200]

No, when you disable minimize scanning, the phone battery consumption may go up.
Since it is not for you, that is perfect.
No, there is no impact on the G7 battery.

[Navid200]

Update xDrip to the May 22, 2024 release.
It may help your phone reconnect faster.

[dagord]

Hello
I installed the last nightly as soon as it became available.
I'll test it a few days and I'll report my experience!
Thank you, and keep up the good work! :)