What is the latest version of OpenWrt for WRT54G?

So this guide is using Kamikaze 7.09 as latest known OpenWRT version that supports the aircrack suite on WRT54G. If you already have a (newer) version of OpenWRT installed, the easiest way is using sysupgrade as described in generic.sysupgrade

Can I connect a serial port to the WRT54GL router?

These two TTL serial ports on the WRT54GL router can be used as standard Serial Ports similar to the serial ports you may have on your PC. In order to do this though you need a line driver chip that can raise the signal levels to RS-232 levels. You can not directly connect a serial port header to the board and expect it to work.

What type of board is the WRT54G switch?

WRT54G v1.1 The WRT54G v1.1 is based on the Broadcom 4710 board. It has a 125 MHzCPU, 4 MBflash and 16 MBSDRAM. The wireless NIC is soldered to the board. The switch is an ADM6996.

Is it safe to reset the WRT54G to factory defaults?

The WRT54G v1.0 is based on the Broadcom 4710 board. It has a 125 MHzCPU, 4 MBflash and 16 MBSDRAM. The wireless NIC is a mini-PCI card. The switch is an ADM6996. Resetting to factory defaults via reset button or mtd erase nvram is not safeon this unit. WRT54G v1.1 The WRT54G v1.1 is based on the Broadcom 4710 board.

What is the last OpenWrt build for 4/32 devices?

2) OpenWrt support for this device will end after 2019.19.07 will be the last official build for 4/32 devices. After 19.07, no further OpenWrt images will be built for 4/32 devices.

Does Luci work with Linksys WRT54G?

* The Linksys WRT54G 1.1 hardware (4 MB of flash) has trouble with OpenWrt 10.03.1-rc6 and maybe all 10.03 releases as of 2011-12-08. In a test with OpenWrt 10.03.1-rc6, the OS will install but LuCI will be unable to update settings because there isn’t enough flash left free.