One day testing data missing my dashboard

I have testing my code for last 3 days [12,13,14]. I download 3 days file on my dashboard but 12 and 14th day files only show 13th Sunday not data update my dashboard any problem occur in server.

i am not sure if there is any problem wit server. did you download the data for a week or individual days? was your device online on 13th ?

I download individual days format. my device online. some no of data store in my dashboard in the day of 13th. I actually post in every 5sec 13th very less count of data only stored.

if there is some data then the device might be offline and not sending data during the remaining time of the day.