some reference designs with BMA400: https://www.onsemi.com/support/evaluation-board/rsl10-solarsens-gevk https://www.telit.com/developer-zone/charlie/ https://www.seeedstudio.com/Grove-6-Axis-Accelerometer-Gyroscope-BMI088-p-3188.html https://www.seeedstudio.com/catalog/product/view/id/1989/
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