Hi. I have FMB001 device with firmware v03.25.05. I have my own Traccar data server.
My usual traffic is ~270 kB per day. But one random day data usage suddenly increases, and device transfers 10-20 times larger amount (2-9 megabytes!). I can see this data in my daily SIM card provider report, but it's not clear, if its upload or download. It happens approximately every 2-3 months:
During those days, I don't see any additional incoming traffic on data server. Nothing extraordinary happens on vehicle (alarms etc.), sometimes it's even standing still for a week.
In device I have turned off FOTA, and I don't use any of the advanced functions as crash detection, idling, speeding etc.
It seems as if the device randomly connects somewhere to internet and downloads something large.
It's a big problem for me, because this traffic suddenly consumes all money on the card, and device goes offline.
Please help. If needed, I'm able to do advanced debugging: reading device SD card logs, capturing traffic on data server and so on.