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Real-world testing of u-blox NEO-M9N with IMU and wheel odometry fused via UKF achieves meter-level positioning. An honest look at low-cost GPS sensor fusion performance and limitations.

A Reddit hobbyist builds a four-wheel skid-steer off-road robot using hoverboard hub motors, ODrive boards, and a Raspberry Pi 5. A deep dive into hardware, 4G teleop, ground friction challenges, and the road to ROS2 autonomous navigation.