Allow user code to override the hard-coded reference voltage calibration constant in function EnergyMonitor::readVcc without them needing to modify EmonLib directly. Per "Calibrating the internal reference voltage" at http://openenergymonitor.org/emon/buildingblocks/calibration.
To use, define your calculated calibration constant in your program prior to importing EmonLib.h. Existing programs will continue to work unchanged, since EmonLib.h will define default value if constant is not already defined.
Example:
define READVCC_CALIBRATION_CONST 1113108L // calculated for a specific Arduino board, update this if using code on a different board
glynhudson
commented
9 years ago
Allow user code to override the hard-coded reference voltage calibration constant in function EnergyMonitor::readVcc without them needing to modify EmonLib directly. Per "Calibrating the internal reference voltage" at http://openenergymonitor.org/emon/buildingblocks/calibration.
To use, define your calculated calibration constant in your program prior to importing EmonLib.h. Existing programs will continue to work unchanged, since EmonLib.h will define default value if constant is not already defined.
Example:
define READVCC_CALIBRATION_CONST 1113108L // calculated for a specific Arduino board, update this if using code on a different board
include "EmonLib.h"