About FAE_CA1

FAE_CA1 · ‎09-17-2021

Hi, BNO055 can enter low power mode when no-motion interrupt happens. By default no-motion interrupt will be generated if BNO055 accelerometer measurements are within the threshold of 0x0A * 7.81mg = 78.1mg @+/-4g range for more than the amount of duration of 5s. Please refer to page 94 of BNO055 datasheet. BNO055 can enter normal mode again from low power mode if any-motion interrupt happens. By default any-motion interrupt will be generated if BNO055 accelerometer measurements are more than the AM threhsold of 0x14 * 7.81mg = 156.2mg for more than the number of data points of (3 + 1 = 4) AM_DUR. Please refer to page 92 and 93 of BNO055 datasheet. Thanks.

FAE_CA1 · ‎09-15-2021

Hi, Thanks for your inquiry. Please see the attached "How to use BMA400 FIFO.pdf" for more information. Thanks.

FAE_CA1 · ‎09-14-2021

Hi, Yes, it is true that BMI088 + BMI150 is better for applications like drones and robots because the gyro inside BMI088 is close-loop gyro and the accel inside BMI088 has vibration damping feature. This is only based on the situation if you have your own sensor fusion algorithm handy. For example, you can download BSXLite from Bosch website or search for other open-source sensor fusion algorithms. Otherwise, I would like to recommend BHI260AP + BMM150 to you. Thanks.

FAE_CA1 · ‎09-14-2021

Hi, BNO055 has BSX3 sensor fusion algorithm running inside, where BHI260AP BSX4 newer version. So I would like to recommend BHI260AP + BMM150 rather than BNO055 for your application. In addition, BNO055 has max ODR of 100Hz and fixed in SW, where BHI260AP can output sensor fusion results such as Euler angles, quaternions, linear acceleration and gravity vector up to 800Hz and it is programmable with the SDK. BSX3 and BSX4 sensor fusion algorithms can auto-calibrate BMM150 mag with Figure-8 motions in 3D space. If BMM150 doesn't rotate, then it is not possible to calibrate it. As long as the object is rotating, BMM150 will be auto-calibrated. The stillness of the object can help calibrate gyro offsets. Thanks.

FAE_CA1 · ‎09-14-2021

Hi, Thanks for your inquiry. On page 100 of BNO055 datasheet it says "BNO055 I2C interface uses clock stretching". So please check if your M4 board supports I2C clock stretching or not. BNO055 values will not freeze internally. The quaternions always update at 100Hz and the values are available in the data registers for read. Thanks.

Bosch Shared

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