My Sparkfun express RTK currently is on firmwre ver 3.6, when I check the update once it is connected to internet via wifi, it says there is a version 3.9 update. But if I click on the button says Update to v3.9, the web page doesn’t show any progress or update for a long time like 5 min. Please see the attached screen shot file. Is v3.9 a legit firmware for Sparkfun express RTK?
I also tried download via my PC and upload as a binary file to RTK, even through serial UART. Nothing works