# data[].attributes.attachment_link.readable_text
Once the 123 Robot is "awake," you can begin to code a project using one of the three VEX 123 coding methods.

The 123 Robot will also turn off when it is plugged in to charge, or if 123 Robot is inactive for approximately 5 minutes. When this happens, you will hear the turning off sound. To turn the 123 Robot back on, push to wake it again. You can set the length of the inactivity time out in the VEX Classroom App.

If your 123 Robot is connected to a Coder, turning off the 123 Robot will also turn off your Coder.

The indicator light will pulse red to indicate that the 123 Robot has a low battery.

When the 123 Robot is connected to charge, the indicator light will flash red when it has a low charge, and will flash green when it has a full charge.

You can view the battery level of any 123 Robot within range of your device, by looking at the battery icon in the VEX Classroom App.

The battery level of a connected 123 Robot can be checked inside of VEXcode 123 by selecting the Robot button in the Toolbar.

The 123 Field is designed for use with the 123 Robot, and offers a consistent and even surface for testing projects. The 123 Field consists of field tiles and field walls, which can be snapped together and arranged to create spaces for testing that best fit your classroom needs. With the Field tiles together, add the walls to the outer edge, to create a barrier to keep the 123 Robot from running off the field.

VEX recommends a ratio of two robots per 2x2 Field, to allow students ample space for testing their projects.

The 123 Field can also be taken apart, and individual tiles can be used by students to have a consistent surface on which to use the 123 Robot.

# data[].attributes.attachment_link.description
Once the 123 Robot is "awake," you can begin to code a project using one of the three VEX 123 coding methods. The 123 Robot will also turn off when it is plugged in to charge, or if 123 Robot is inactive for approximately 5 minutes.

# data[].attributes.attachment_link.readable_text
Use a small screwdriver to open the battery door on the back of the Coder, and install 2 AAA batteries. The batteries should last approximately 6 months before needing to be changed.

Note: VEX 123 Classroom Bundles include a screwdriver for opening and closing the battery door.

The Coder will remember and automatically reconnect to the last 123 Robot used. When the Coder finds the previously connected 123 Robot, it will automatically reconnect and the 123 Robot will make the connected sound. Listen to the following animation to hear the connection sound.

To connect the Coder to a different 123 Robot, repeat the connection process again with a different 123 Robot.

Note: When connected to the Coder, the 123 Robot will not time out, but will stay on until the Coder is turned off, or the 123 Robot itself is turned off.

You will hear the 123 Robot play the start sound when it begins the project. As each Coder card is read, the indicator light beside that Coder card will show green. When the project is completed, the 123 Robot will play the completed sound. Listen to the following animation to hear the start and completion sounds.

To start your project again, or change your project and start a different one, remove or replace the Coder cards as needed, and press Start again.

To turn off the Coder, press and hold the Stop button until the indicator light at the top of the Coder turns off.

Turning off the Coder will also turn off the connected 123 Robot. Turning off the connected 123 Robot will also turn off the Coder.

# data[].attributes.attachment_link.description
Welcome to the VEX Library, a library of information about all things VEX.

# data[].attributes.attachment_link.description
Login to access and create your next design.

# data[].attributes.body
Make a costume for your Bee-bot!