UM980 configuration issues

I bought an simpleRTK3B Budget (UM980) for my standard 4.5 board and I simply can’t get it to communicate with the teensy 4.1,
Is the configuration different than the UM982? And should I use the same firmware as UM982?

I configured it to ardusimple instructions for Um980 and changed the baud rate to 406800.
Swapped the tx an rx connection, on RX3 and tx3
Still not connecting.

Have you configured com1 and com 2 both to 460800 and set to recieve the correct messages ie panda? Easier to do all the coms to the same configuration imo as its not always easy to know which is com1 2 or 3 with com 3 usually being the usb connection

I’m not getting panda messages, how do I get them?

The teensy wont communicate without the right message and configuration
Not too sure on the um980 but the um982 can be configured via configomatic for single gps but doesn’t work for dual