The mPCIe A/B lanes have two configuration options: a single 2-lane interface(mPCIe A) or two separate 1-lane interfaces(mPCIe A+mPCIe B).The BPI-R4-NIC module requires 12V power supply, so the power supply on the BPI-R4_Lite-Main must be turned on before powering on (SW4 is turned to the “ON” position, and the 12V LED will lights up when power on).
When you need to use a WiFi 7 NIC, be sure to flash the 1PCIe, 2Lane image.
For example：
Finally, when lspci can detect the 7990 and 7991 devices, it indicates that the WiFi 7 NIC has been successfully detected.
