• Ticket 13009 tracks the effort to support this device.
• https://forum.openwrt.org/viewtopic.php?id=42372

You can flash the router from a PC using the Firmware Restoration utility or via TFTP.

To put the EA-N66 in recovery mode, disconnect power from the router first, then hold the reset button (pinhole button below the EA-N66) while powering on.

The antenna lights will slowly alternate between dim and bright to signal that the router is waiting for a firmware to be uploaded.

The router IP in recovery mode is 192.168.1.1/255.255.255.0 and your PC should be configured as 192.168.1.75/255.255.255.0 (the router sends ARP requests to 192.168.1.75 before accepting a TFTP flash).

Ping 192.168.1.1 should give a response; you can then proceed to upload new firmware using the Firmware Restoration utility or TFTP to 192.168.1.1.

After taking a few minutes to flash, the EA-N66 will reboot itself into the new firmware; if it is not responding over the network, your firmware probably did not boot successfully.

# cat /proc/mtd 
dev:    size   erasesize  name
mtd0: 00400000 00010000 "ALL"
mtd1: 00030000 00010000 "Bootloader"
mtd2: 00010000 00010000 "Config"
mtd3: 00010000 00010000 "Factory"
mtd4: 003b0000 00010000 "Kernel"

Note: This may void your warranty!

There are 3 screws hidden below the 3 rubber feet. Unscrew them and gently pry the bottom plate off. Disconnect the 3 antenna connectors and the PCB can be removed.

J12 is the TTL 3.3V serial port and its pinout is labelled on the reverse side of the connector.

→ Stock firmware

→ Booting AA beta build for RT-N56U (it boots partially)

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