Kris Winer designed this is a small 4-layer PCB for remote logging of absolute position and orientation:
Asset Tracker
STM32L433-based board with CAM M8Q concurrent GNSS, EM7180 + MPU9250 + MS5637 for absolute orientation, and an ESP8285 for wifi connectivity.
The absolute orientation engine uses the MPU9250 accel/gyro/magnetometer IMU sensor plus the MS5637 barometer as slaves to an EM7180 motion co-processor that sends quaternions and drift-stabilized altitude to the host via I2C.
PeskyProducts has shared the board on OSH Park:
AssetTracker.v02c
OSH Park 