Is it efficient to use PI ML without using Handheld devices since my energy meters are not smart enough to send data to handheld devices.

I have used PI Mannual logger by installing on mobile devices(handheld devices) to get data from Smart Energy meters. I really doubt that whether PI ML be used without hand held devices since my energy meters are not smart to send the data to handheld devices.

Can i use it just by installing it in my local machine and some one from plant will enter data into PI ML and send that data to PI server.