Reconnecting an IQ Brain to an Android Tablet in VEXcode IQ

When you suspend VEXcode IQ by either putting the tablet to sleep or by switching to a different application on the tablet, the app may lose connection to the VEX IQ Brain. When you resume the app by waking the tablet or switching back to the VEXcode IQ app, the app should automatically try to reconnect. 

If the Android tablet does not automatically reconnect within 20-30 seconds to the VEX IQ Brain, one of these situations generally arises: 

  • The VEXcode IQ screen is blank
  • The VEX IQ Brain thinks it is connected, but VEXcode IQ does not connect

Note that the images in this article use a VEX IQ (1st generation) Brain, but the troubleshooting tips can be applied to a (2nd generation) Brain as well. For information on how to initially connect an IQ (2nd generation) Brain to an Android Tablet, see this article.


The VEXcode IQ screen is blank

Try force closing VEXcode IQ and reopening VEXcode IQ.

Then relaunch VEXcode IQ.


The VEX IQ Brain thinks it is connected, but VEXcode IQ does not connect

If VEXcode IQ was closed or suspended for less than 10 seconds, the VEX IQ Brain could think it is still connected and the data connection status indicator on the VEX IQ Brain will indicate a connection. 

In this scenario you will need to first wait for the VEX IQ Brain to realize it is no longer connected to the tablet, which may take 10-15 seconds.

If the VEX IQ Brain never disconnects, follow the steps in How to Troubleshoot iPad/Android Failing to Connect to a VEX IQ (1st generation) Brain to resolve.

Depending on your IQ Brain, reconnecting can take up to 3 minutes. If the brain does not establish a connection after 3 minutes, power cycle the brain and try again.

If none of these steps cause the VEX IQ Brain to reconnect, try the following steps:

  1. Try force closing VEXcode IQ and reopening VEXcode IQ.
  2. Close any and all other apps running before restarting the VEXcode IQ app. 
  3. Restart the VEXcode IQ app to see if the connection is now successful.

If you have an issue with your Bluetooth connection, see the Troubleshooting a Bluetooth Connection article.