Cudy M1800

The Cudy M1800 is a Mesh system from Cudy, having Wifi 6 support and two Gigabit LAN ports. It is typically sold in pairs of two or three. Sometimes, the selling name includes AX1800 like in “Cudy AX1800 Whole Home Mesh WiFi System M1800”.

While there also existed a v1 version which is already EOL (End-of-Life), the V2 will have support until somewhat 2027 according to Cudy's support page.

There are two known options:

1) The Luci-based UI.

2) Press and hold the reset button during power up. The router will request 'recovery.bin' from a TFTP server at 192.168.1.88.

Both options require a signed firmware binary. The openwrt image supplied by cudy is signed and can be used to install unsigned images.

One can download the OpenWRT image at: http://www.cudytech.com/openwrt_software_download (https does not work on this page)

There is only an OpenWRT image for the M1800 v2. If you have a device which has a Firmware-Version of 2.x - this is the v2 version of the M1800.

One can play around with the UI in the browser to get a feel using the Cudy emulator: https://support.cudy.com/emulator/M1800/

The following is taken from the M1800V2_GPIO.xlsx in M1800+V2.zip from http://www.cudytech.com/openwrt_software_download

First you need to download the signed Cudy OpenWRT firmware from here: http://www.cudytech.com/openwrt_software_download

• Browse to http://192.168.10.1/cgi-bin/luci/admin/panel
• Click on Firmware
• Upload cudy openwrt bin file to router
• Wait for it to reboot
• SSH to 192.168.1.1 and set a root password, or browse to http://192.168.1.1 if LuCI is installed.

Download the recovery.bin for your device from this page: http://www.cudytech.com/openwrt_software_download

• Place the recovery.bin in the serving directory of your TFTP server
• set your IP to 192.168.1.88
• Press the “Reset” button of Cudy router and hold it. Before the Cudy router is powered on and before TFTP start to download the firmware, don't release the “Reset” button
• Power on the Cudy router.
• You can release the reset button only when the status LED flashes red and blue quickly, or when TFTP starts downloading firmware.
• When the status LED turns solid red, the upgrade is complete.

→ 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.

→ 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:
Insert photo of front of the casing

Back:
Insert photo of back of the casing

Backside label:
Insert photo of backside label

→ Warranty

Opening the case is little Challenging. First remove the white plastic cover from the top. Below you will find a screw, remove this. from the right of the cudy truy to insert a thin metal and move the gray plastic out. be careful there are 4 antennas glued to this plastic part. Remove this with soft action from the plastic.

From here I was not able to get the PCB mounted on the plastic out. To me it looked like the LED cover is inside the plastic cut out of the main body. may you can get out the PCB if the two screws around the LED get losen. I was not able to get the PCB out of the case.

Main PCB:
Insert photo of PCB

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

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

→ 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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