I just received my emonpi PCB board and pre-built SD card and on boot up is hanging at Started DPHYS-SWAPFILE - SET UP, MOUNT/UNMOUNT, AND DELETE A SWAP FILE
Any ideas? The pi is working perfectly and has been for a while? I thought the build of emonpi was Pi2 , 3 compatible etc?
When you first booted, did you give it a good long while to do all updates? If not, and you rebooted too quickly, you could have corrupted the OS. First thing would be to re-flash the SD card and try again (waiting a good while for all updates to complete).