What happens if the ezeio loose power or can't communicate?

The ezeio has a built-in non volatile buffer memory.

If the communication with the servers is lost, the buffer memory will continue to record data as long as the ezeio has power. When the communication is restored, the buffered data will be automatically sent to the servers.

The buffer memory has room for 8000 samples for each of the 40 channels. So if the log rate is set to 5 minutes, the data will be buffered for up to 8000x5 minutes for all 40 channels -- that's close to one month.

If the power is lost, the ezeio will not log anything, but as soon as power is restored, the logging will resume. Note that unlike 'Linux based' devices, the ezeio can not be damaged from power loss/restore.