I've got my Dexcom set to do a low alarm when I get below 80.
Last night at about 1 am, it went off. The Dexcom said I was at 59. I took my blood sugar with my meter, and it was spot on - exactly 59. Yay!
But my question this morning is why did it not go off until I was at 59? I downloaded the data, and according to the chart, I first dipped below 80 at 12:15 am, then kept going down until 1am when it woke me.
I've had it successfully go off at right below 80 before. Why would it not have done it last night?