Edimax EW-7478AC

The Edimax is an AC1200 Wall-Wart access point. It has 1 Gigabit Ethernet port and 2 external antennas. It is now also sold under the name Edimax Gemini RE11 as a pair of range extenders and as RE11S as as a single range extender. The firmware for the EW-7478AP can be flashed also onto these devices, see the installation instructions below. The device is also compatible with the EW-7476RPC, which has internal instead of the external antennas.

→ Install OpenWrt (generic explanation)

Download the sysupgrade.bin file. Depending on the branding, you need to edit a magic number at the beginning of the binary file with a hex-editor (e.g. hexer on Linux). The original Edimax model has RN70 starting at file position 0x0c. If you want to flash the OpenWrt firmware for the first time on a rebranded model, you need to edit this magic number to match the magic number you can find at the beginning of the orignal vendor's firmware upgrade file. For the Edimax Gemini RE11 and RE11S modles, the magic number is RN74.

Address Layout:

→ generic.flashing.tftp

When using UART serial console, there are no specific values needed for this device, the U-Boot bootloader allows you to set the device's own IP address and the address of the tftp server. It also allows you to enter the name of the image to transfer.

There are client and server TFTP upload modes available. By default, U-Boot loads in server mode, to enter client mode:

• power off the device
• press and hold WPS button
• power on the device
• release WPS button after 5 seconds

In client mode device IP address is set to 192.168.1.6

In some cases to restore original firmware after OpenWRT installation you have to edit a magic number at the beginning of the binary file with a hex-editor (e.g. hexer on Linux). The original Edimax firmware has RN70 starting at file position 0x0c, for some models it may be changed to RN74.

→ generic.sysupgrade

cd /tmp
wget http://downloads.openwrt.org/snapshots/trunk/XXX/xxx.abc
sysupgrade /tmp/xxx.abc

cd /tmp
wget http://downloads.openwrt.org/snapshots/trunk/XXX/xxx.abc
mtd write /tmp/xxx.abc linux && reboot

→ generic.debrick

→ failsafe_and_factory_reset

→ Basic configuration After flashing, proceed with this.
Set up your Internet connection, configure wireless, configure USB port, etc.

The default network configuration is:

As there is only 1 Ethernet port, there is nothing you can configure on the switch.

→ hardware.button on howto use and configure the hardware button(s). Here, we merely name the buttons, so we can use them in the above Howto.

The Edimax EW-7478AC has the following buttons:

Front:
Insert photo of front of the casing

Back:
Insert photo of back of the casing

Backside label:
Insert photo of backside label

Note: This will void your warranty!

To open the case, remove the sticker at the back of the device with the default login setting. Remove the screw that was below the sticker. Pry open the lid from the backside of the device with a prying tool starting from one of the air outlets at the top or bottom of the device.

Main PCB:

→ port.serial

Serial Port Pinout:

(TX) (GND) (RX) [VCC]

→ port.jtag general information about the JTAG port, JTAG cable, etc.

How to connect to the JTAG Port of this specific device:
Insert photo of PCB with markings for JTAG port

Space for additional notes, links to forum threads or other resources.

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