Gps & inav not working

i have omnibusf4v6 with inav and a beitan 880 gps w/compass. tried everything I know, can’t get it to work. read some other forums on the subject but they are not clear on the solution. any suggestions?

dont bother trying any more. just get yourself a Matek FC. I did plenty of research and trial and error could never get everything working if i remember correctly something to do with the SCL SDA pads sharing another pad and you carnt remap INAV, honesly dont try anymore just get another FC

does the matek have all the same functions? does it support inav?

i use a 405 and as been excellent.