To use the node in your project you should have the wayland/sfm3x00-flow-meter library installed. Use the “File → Add Library” menu item in XOD IDE if you don’t have it yet. See Using libraries for more info.
C++ implementation
node {
void evaluate(Context ctx) {
// Measure flow rate only if there is an input pulse.
if (!isInputDirty<input_UPD>(ctx))
return;
auto sensor = getValue<input_DEV>(ctx);
emitValue<output_FR>(ctx, sensor->readFlow());
emitValue<output_DONE>(ctx, 1);
}
}