Driver Hub Troubleshooting

In this troubleshooting guide we will use specific language to describe different ways of power cycling the Driver Hub.

Turn Off/Power Off - Long press (1-2 seconds) the power button so that a drop down menu appears, then tap "power off" on the screen

Hard Reboot - Hold power button for at least 10 seconds and do not touch anything on the screen. Once the green LED light turns off and the screen goes dark, release the power button, and the hard reboot is complete.

Most Common Issues

Updating the Driver Hub Operating System

When Updating your Driver Hub to the newest operating system, version 1.2.0, please be sure to follow these steps:

  • Install the update on a fully charged Driver Hub. If the update fails, please plug in your hub and try again after fully charging.

  • Don't touch the screen when a loading bar is displayed on the Driver Hub during the update process. If you touch the screen you will be directed to a menu after installation completes. Do not touch the screen and hard reboot your Driver Hub.

  • Once you have updated your hub, please verify that your device is showing the current version 1.2.0, in the REV Hardware Client.

Additional Troubleshooting

Driver Hub Shows as a "Control Hub in Recovery Mode"

Occasionally, the Driver Hub may show as a "Control Hub in Recovery Mode" after fully powering on and connected via USB to the REV Hardware Client.

To fix this issue you will need to perform a factory reset on the Hub.

"App Not Installed" Error

Please ensure your Driver Hub and Robot Controller App are fully updated before proceeding.

The following error in the Driver Station App can occur when the date/time is incorrect on the Driver Hub:

On the homepage the FTC Driver Station app can report an "app not installed" error after updating the OS and the app. This can also cause the Driver Hub to not allow you to open the FTC Driver Station app. To fix this do the following:

  1. Remove the Driver Station app icon on the home page by clicking and dragging to the X icon

  2. Drag the new icon from the app drawer on the home screen. The app drawer is accessed by swiping up on the home screen of the device.

Android Permissions Lock Out

If the FTC Driver Station app is locked out due to android permissions, a factory reset of the Driver Hub should resolve this issue. Please power on the device, then follow the steps below to perform a factory reset:

  1. Tap the "Setting" icon

  2. Tap the "System" icon

  3. Tap "reset options"

  4. Tap "erase all data" (factory reset)

Battery Installation

To install the battery, place it with the REV Logo facing out and the -/+ located near the contacts for the device. Add on the rear door and screw in using the included M3 hardware.

Digitizer Lines

Due to variances in the manufacturing process related to screen digitizer installation, some Driver Hubs have minor visible digitizer lines on the screens when the device is powered off. These lines are more prevalent in some units than others, but the presence or absence of digitizer lines does not impact the performance of the touch screen or unit in any way. Please contact us at if you have any concerns about your specific unit.

Connecting to Control Hub

Information in this flowchart is for the initial bring up of connecting the Control Hub with a Driver Hub. For issues with intermittent connection or periodic connection drops please check out the information below this flowchart.

The Wi-Fi reset will down grade the Wi-Fi connection to 2.4GHz. If you have an android device with 5GHz you may want to switch the Wi-Fi band in order to run on 5GHz. Check out the Updating Wi-Fi Settings Section to learn more about making this switch.

External factors, such as local Wi-Fi environment, play a part in the ability to establish or maintain a connection between a Control Hub and a Driver Station device. Like all aspects of of troubleshooting its important to isolate an issue by asking questions and discovering the answers! As you work on troubleshooting consider the following questions:

  • Is your system operating on a 2.4 GHz band or 5GHz band?

    • REV recommends, if you have a dual band Driver Station device, that you operate on the 5GHz Wi-Fi band. Check out the Updating Wi-Fi Settings section to learn more about making this switch.

  • What is your local Wi-Fi environment like?

    • Local Wi-Fi environment effects the consistency of a connection to the Control Hub. Use a Wi-Fi analyzer to check the local environment for channels that are cluttered with Wi-Fi networks. Change the Control Hubs Wi-Fi channel to a channel with the least amount of overlap with other networks.

  • Are you in a school or a place of business?

    • In addition to the amount of local networks in an environment its important to understand what those local networks are capable of. For instance, some school districts have security measures in place that block unauthorized Wi-Fi access points. Talk to your local Wi-Fi administrator to find out what you need to get the Control Hub as an approved network.

  • Does the the Driver Hub connect to the Control Hub until a mechanism is run?

    • Certain mechanisms draw enough power from the Control Hub to put a strain on the battery. If you notice a drop in displayed voltage when you start a code, or when a particular mechanism is run, this may be indicative of a brown out condition. Other indicators include:

      • The Driver Hub throwing errors about power to the system

      • The Driver Hub making a disconnect sound

      • The voltage on the Driver Hub showing 9 volts or lower when running code

      • Motors running at lower speeds then what they have been set to run

    • To remedy this issue check out our instructions on proper battery care.

If the Control Hub SSID is not shown in the list of available Wi-Fi networks, try manually entering the Control Hub SSID on the Driver Hub to see if that allows you to connect.

If no networks are shown at all, you should reboot the Driver Hub. See Most Common Issues section.

If you are still experiencing connection issues, once you have gone through the flowchart and worked on addressing the potential root of connection issues describe in the list above, start looking for patterns in the behavior. How often does this behavior appear? Are there certain things that happen around the same time the disconnects happen? The following list provides some ideas on what sort of patterns you might see:

  • The Driver Hub connects to Wi-Fi and the Control Hub when a team member takes it home but doesn't connect consistently at school.

  • The Driver Hub connects to the Control Hub until you start driving the robot around.

Correlation does not equal causation of an event but is useful to take note of for further troubleshooting

Performing a Factory Reset to the Driver Hub.

  1. Power on the Driver Hub and find the Settings application.

  2. Click Settings and scroll down to System, then tap System.

  3. Once you are in System, find "Reset Options".

  4. Press "Erase all data (factory reset)". Keep in mind this will erase all applications, files, images, and anything else you have stored on your Driver Hub.

Still Need Assistance?

Contact REV Support with details of the troubleshooting information you have collected such as the answers to the questions above and the outcome of your troubleshooting thus far. It will also help to send logs or other diagnostic data to REV Support.

If you encounter any of these issues below, please email

  • Device freezes on boot, then restarts the boot process in a loop

  • Device freezes on boot and never gets into the OS, even after a hard reboot

  • Charging and Power issues persist after multiple battery calibrations

Need help getting the Log Files to send to REV Support? See Downloading Log File for more information.

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