Flysky and Relay

 if (sig6 < 1200)
   plowup = HIGH;
  
   else if ((sig6 > 1400)&&(sig6 < 1500))
    plowup = LOW;

if (sig6 > 1900)
    plowdown = HIGH;
 else if ((sig6 > 1400)&&(sig6 <1500))
    plowdown = LOW;

I tried this with some success one the serial monitor phew