Emonpi internal data logging

Hello,

i just set up the emonpi on my home network. It's working and gives me the data on an external website. However, when I log in to the device itself, I find that  internal data logging has stopped. When I reset the emonpi, it starts logging but a little while later, the internal logging stops. Do I have a defective unit? Any response will be highly appreciated so I can return it back in time.

 

regards