Some diagnostic software may not work with versions 2.1.0 and above.
Alternatively, you can manually set the baud rate to 38.4 kbps. If you have an OBDLink with Bluetooth option, be sure to switch the Bluetooth baud rate to 115.2 kbps before upgrading the firmware from version 2.0.2 or older to version 2.1.0 or newer.