Custom Optical Flow Data to APM

ArduCopter
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1

Hi All,
I’m trying to feed data from my custom optical flow algorithm to APM so that it can use it in FlowHld mode. How do you set the EK2_FLOW_DELAY value? Also, my messages will be MavLink based so it should be a drop-in replacement for OpenMV as described here.

Thanks,
Nitin