LEDs: 1x POWER (blue, configurable)
3x LAN (blue, configurable)
1x WAN (blue, configurable)
1x USB (blue, not configurable)
1x 2.4G (blue, not configurable)
1x 5G (blue, not configurable)
Flash by U-Boot TFTP method:
Configure your PC with IP 192.168.1.2
Set up TFTP server and put the factory.bin image on your PC
Connect serial port(rate:115200) and turn on AP, then interrupt "U-Boot Boot Menu" by hitting any key
Select "2. Upgrade firmware"
Press enter when show "Run firmware after upgrading? (Y/n):"
Select 0 for TFTP method
Input U-Boot's IP address: 192.168.1.1
Input TFTP server's IP address: 192.168.1.2
Input IP netmask: 255.255.255.0
Input file name: openwrt-ramips-mt7621-asus_rt-ax53u-squashfs-factory.bin
Restart AP aftre see the log "Firmware upgrade completed!"
Yep, it make sense, asked because in most routers when You connect a disk at usb 3.0 port then 2.4 radio is useless. Because of this overpriced and not full feature suported i went to x86 router with pfsense and have only two access points with openwrt.
Usb 3.0 operates on frequency niear 2.4 radio so if usb lanes aren't properly shielded then usb signals are jaming 2.4. Radio signals, need realy nice and proper shielding, had this issue on couple of routers and my logitech g603 mouse...
It depends on the wifi card you've plugged in. Most wifi cards can broadcast on the both bands but only one at a time. You are looking for a DBDC wifi card that can broadcast simultaneously on both bands. Of course it is also more expansive.