Linksys E7350 (aka. Belkin RT1800)

Linksys E7350 is a 2×2 802.11ax (Wi-Fi 6) router based on MediaTek MT7621A & MT7915D.

See Hardware Highlights for its hardware specification.

This device has 2 partitions for the firmware called firmware and alt_firmware. To successfully flash and boot the device, the device should have been running from alt_firmware partition. To get the device booted through alt_firmware partition, download the OEM firmware from Linksys website and upgrade the firmware from web GUI. Once this is done, flash the OpenWrt Factory firmware from web GUI.

→ generic.flashing.tftp

Based on forum post by LokeYourC3PH

• Disassemble router to access the UART headers
• Configure your ethernet with IP 192.168.1.2
• Connect your ethernet to the router switch port 1
• Set up TFTP server to serve the firmware .bin file
  • You will need to type in the name of the file onto the router, so it is recommended to rename it to something shorter
• Connect the GND, TXD, and RXD pins to your serial adapter
  • Do NOT connect the 3.3V pins
• Start listening on serial
• Turn on the router
  • If you see garbled text and your serial is configured correctly, the original forum posts recommends connecting the serial connection after turning on
• Once you reach U-Boot, select option 6
  • Keep the default IP of 192.168.1.1
  • Set the TFTP server to 192.168.1.2
  • Enter the name of the firmware .bin file
• Wait for flashing to finish

→ 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

1. Boot to alt_firmware (where stock firmware resides) by doing one of the following:
   1. Press the “wps” button as soon as power LED turns on when booting.
   2. (OR) Hard-reset the router consecutively three times to force it to boot from alt_firmware.
2. To remove any traces of OpenWrt from your router simply flash the OEM image at this point.

→ generic.debrick

→ failsafe_and_factory_reset

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

→ 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.

Front:

Back:

Bottom label:

→ Warranty

Step 1: Remove the 4 screws from the bottom of the router. These may be hidden under the info stickers

Step 2: Use a pry tool around the edge of the bottom piece to remove, revealing 2 additional screws

Step 3: Remove these 2 screws

Step 4: Apply slight pressure to the inside of the back pannel to push out the main board. The main board will not loosely fall out, but does not take much pressure to remove

Step 5: Finish removing the main board from the shell

Main PCB:

→ port.serial general information about the serial port, serial port cable, etc.

How to connect to the Serial Port of this specific device:

→ 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

→ bootloader

None so far.

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

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