Need Help setup in ardupilot traditional heli rpm monitoring

Hi I m currently having problem doing setup of rpm monitoring I m using hlgrc 90 amps blhlheli32 esc and using its telemetry wire for rpm monitoring but I m unable to monitor any rpm on other esc status can anyone Help me with this I followed every step given by the wiki but still no luck @andyp1per @Ferrosan @oldgazer1 @amilcarlucas

Share a parameter file and tell us what kind of flight controller you’re using.

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I’m using omnibus f4pro v2

Will upload params Tommorow