# RoverSteeringSetpoint (UORB message) [source file](https://github.com/PX4/PX4-Autopilot/blob/main/msg/RoverSteeringSetpoint.msg) ```c uint64 timestamp # time since system start (microseconds) float32 normalized_steering_angle # [-1, 1] Normalized steering angle (Ackermann only, Positiv: Steer right, Negativ: Steer left) float32 normalized_speed_diff # [-1, 1] Normalized speed difference between the left and right wheels of the rover (Differential/Mecanum only, Positiv = Turn right, Negativ: Turn left) ```