This is because you use the home edition of the EV3 software.  

This article describes how to add the gyro and ultrasonic sensor to the home edition:
http://robotsquare.com/2014/06/25/tutorial-gyro-ultrasonic-sensor-ev3-home-edition/

On Wed, Jan 7, 2015 at 3:47 PM, Kathleen Walsh <[log in to unmask]> wrote:
I don't know if you can help me, but our team has recently purchased a gyro.  We would like to discover how this sensor works, but the programming folder on the EV3 programming pallet does not have a gyro sensor.  Can you help?  Is there an update that I need to make?  Thanks for your help!

Team:  STARS

On Mon, Nov 10, 2014 at 9:08 PM, Naren Botlaguduru <[log in to unmask]> wrote:
First of all thanks to this community for clarifying lot of questions. Great work.

We are using Gyro sensor this year and understand about the Drift.

We tried following but still Robot sometimes just spins....

1. Kids are resetting the sensor before every program and also couple of times in the program.
2. Compare is set to equal to rather than Greater than Equal to or Less than equal to as those both options didn't work for us.
3. We are also deducting some drift value to get right angle value.
4. Kids are using a very slow power to do the turns.

But still the program that works one day is not working another day due to the Gyro sensor keeps on rotating sometimes. Kids are restarting the Robot when they see that but still not helping.

Any tips and tricks to solve this will be a great help. Is there firmware or something that need to be done so that Gyro sensor doesn't give us that drift and gives perfect angle stop.

Thanks in advance for any help with Gyro Sensor.


--

Thx
Naren

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--
Peace,
Kathleen Walsh, M.Ed.
Middle School Teacher
St. Thomas Aquinas Regional School
2011 Blue Ribbon School of Excellence


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