Drone wont climb above 1m in loiter mode

ArduCopter
1

My drone wont climb after 1m height. I am using Hex here flow sensor. there is no gps module mounted on the drone. what can be the issue?
I have set these parameters in mission planner

  1. Set EK3_SRC1_POSXY= 0(Primary horizontal position from GPS, set this to 0 to only use the optical flow sensor)
  2. Set EK3_SRC1_VELXY = 5 (Primary horizontal velocity from OpticalFlow)
  3. Set EK3_SRC1_POSZ = 1 (Primary vertical position from barometer)
  4. Set EK3_SRC1_VELZ = 0 (No primary vertical velocity sensor)
  5. Set EK3_SRC1_YAW = 1 (Primary yaw/heading from compass)
  6. Set FLOW_TYPE = 6 (DroneCAN)
  7. Set CAN_P1_DRIVER = 1 to enable DroneCAN
  8. Set CAN_D1_PROTOCOL = 1 (DroneCAN)
  9. Set RNGFND1_TYPE = 24 (DroneCAN)
  10. Set RNGFND1_MAX_CM = 300 to set range finder’s maximum range to 3m
2

Can it be an error in the gravity reduction loop? Who knows, if you post DF logs, that world help is help you. :slight_smile: