The following sections, "Common Indicators and their Solution Steps," provides common indicators of issues seen in the Expansion Hub. Think about what the potential indicators your Hub is currently exhibiting and consider the following questions:
Did you perform a firmware update before the Hub began to have issues?
What is the behavior of the Status LED on the Expansion Hub?
Is the Driver Station showing an error message 'Cant find the Expansion Hub Portal"?
Did the Robot Controller app open when you plugged in the RC phone and gave power to the Hub?
Are you experiencing issues with communication between a primary and secondary Hub?
The firmware update failed and the Hub is unresponsive
Try a
The LED on the Expansion Hub is not lighting up
The steps below utilize information provided in the article. Use this article to help you navigate as you run through the troubleshooting flowchart.
If you are attempting to connect two Expansion Hubs together please confirm that the first Expansion Hub is connected to the Robot Controller. From there change the Expansion Hub address. For information on how to change the Expansion Hub address check out the article.
The most common cause of a loose or wiggly XT30 port is compressed pins within the male XT30 connector on your Hub. Each pin of the male XT30 connector is made of 4 tines that should have a small amount of space between them. In the image below, the pin on the top has the correct amount of space and the bottom one is visibly compressed, however, an XT30 pin can still be too compressed even if there is visible space.
To help repair compressed XT30 pins, we recommend using an X-ACTO Knife or similar very thin blade to slightly separate the tines. Please use extreme caution when doing this repair as expanding the tines too far can cause the XT30 connector to not fit.
After slightly separating the tines, the male and female XT30 connectors should have a more secure connection.
Use the to .
Plug your Expansion Hub into a Windows PC
Open the Device Manager in Settings
Click the arrow next to Universal Serial Bus Controllers
Find USB Serial Converter under the menu
Unplug the USB from your RC phone
Power off the main robot switch (turn off 12V power from the Expansion Hub(s))
Wait a few seconds
Turn on the Main Robot Switch (supply 12V power to the Expansion Hub(s))
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.
The Hub is not being recognized or communicating with the phones
Try doing the
There are
If this is not present there maybe a larger issue with your hub. Email support@revrobotics.com with details of the steps you have taken so far and any order numbers for the Expansion Hub (if you have them)
On your RC phone, press the square button and the swipe to close the FTC RC app
Plug your RC phone into the USB-- the FTC app should automatically open
If the app doesn't automatically open, you do not have a good connection from the Expansion Hub to the Phone. Check your cables first, followed by the micro and mini USB connections.
Consider using some form of strain relief (like the or one of the many 3d printable options available on places like Thingiverse) to keep the USB-mini port from being damaged.
