Another issue can be movement of the robot while sensor is calibrating on boot.  When the EV3 brick is red on boot it is calibrating itself and the connected sensors.  Movement of the robot at this point can and will mess with that calibration.  I recommend putting the robot on a flat surface and not touching it while it boots.  Once the EV3 brick turns green you should be able to move it with out effecting the calibration.  Additionally Large movements when holding the robot when powered on can throw off the sensor.   


V/R
Matt

On Fri, Oct 19, 2018 at 8:55 AM Cedric D'Costa <[log in to unmask]> wrote:
Hi Laskshmi,

My team has managed this by simply removing the cable from the port and plugging it back in.
If it happens too frequently, then call LEGO Education for a replacement.

Regards,
Cedric D’Costa

Sent from my iPhone

> On Oct 18, 2018, at 10:47 PM, Lakshmi Purushothaman <[log in to unmask]> wrote:
>
> Hi All
>
> The gyro sensor often starts increasing numbers and decreasing numbers even when the robot is not moving. We do have reset gyro but sometimes it acts crazy and then after reseting and shutting the brick down then it calms down. Is there a better way to manage the gyro ?
>
> Thanks
> Lakshmi
>
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