Modbus signal from fatbox to Ubidots

Good day.
I am currently working on my new Fatbox unit where I need to send and monitor some values in the Ubidots. The thing is, the sending of data from the Fatbox to Ubidots is not continuous. I want a real-time monitoring of the values of my instruments. When I try to reboot the Fatbox, the receiving of data will continue again. But those data are the pending data.
That is why I am monitoring the late values of my instruments.
May I know how to fix this? And does the time settings affect this?
Thanks a lot.