How to project control voltage?

how to project control voltage of solar panels n widget display?
sorry i am beginner
i want to learning blynk
i happy learning to blynk


I would recommend first of all make it work without Blynk. When you’ll be able to get data to Serial Monitor, let us know.

okey thank’s

how to export data to excell?
how to make data logger?

No ability to export to excel yet
Logger is a widget on Android only

how many port graph?
thank’s you answer