I want to record analog data over some days and display this as history graph in Blynk (for example moisture data of plants).
Since the App isn’t open all the time how does this work?
Do I need to store it in Arduino and send it somehow once Blynk App is opened?
Do I need to send it after each measurement and its stored on the server?
I got no idea how this should work.
Maybe someone has example code for storing and showing such data?