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PX4Flow no log data

Posted by Xu Ming on May 5, 2016 at 11:29pm

Hi guys,

PX4Flow overview said:
(http://ardupilot.org/copter/docs/common-px4flow-overview.html)

6.Power up the vehicle using the battery and repeat steps 4. and 5. If you get no data, but works when the Pixhawk is powered via USB, then it is likely you have encountered a start-up problem with the PX4-Flow sensor and the APM+Pixhawk combination that is known to affect some sensors. Currently there is no solution to this other than to always power up via USB first before connecting the battery. Please notify the APM developers and PX4Flow supplier if this occurs.

I encountered this problem, no px4flow log data, but pixflow work correctly through run command px4flow test in nuttx console mode.

When I connect usb power supply, the px4flow log occured.

how can I get the log through battery?

Thanks.

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Replies

  • steve foy May 11, 2016 at 12:44pm

    Hi Xu,

    I done this calibration more than a few times, I alway just used a long usb cable extension.

    • Xu Ming > steve foy May 11, 2016 at 7:37pm

      Hi steve

      Thanks.

      I resolved this issue, usb cable to calibrate is also passed to me, but failed with battery power suply.

      I found pixhawk boot is faster than px4flow, the I2c is not ready. so I add 2 seconds delay in apm.RC file. Then I can see the log.

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