Sketch RAM usage

[MaxPlus]

RAM: [= ] 12.1% (used 39736 bytes from 327680 bytes)

From above, it is the RAM usage display when compiling a sketch. By the way, if I want to get this information while running my sketch dynamically.

Is there an API for supporting to get this info?

[OutOfLine]

Have a look at ESP.getFreeHeap();