Bricking a router is one of the most stressful moments for anyone experimenting with firmware. I experienced this firsthand when I attempted to switch from **OpenWrt firmware back to the official **Cudy firmware on my Cudy WR3000 Router.
The official recovery guide from Cudy mainly demonstrates the process using Microsoft Windows, which made the process slightly more complicated because I was using a MacBook Air M2 running macOS.
After some trial, patience, and careful configuration, I successfully unbricked the router using TFTP recovery. This article documents the complete process so others using macOS can recover their Cudy routers without panic.
Understanding the Problem
When replacing the stock firmware of a router with OpenWrt, the router’s bootloader usually remains intact. However, if the firmware flashing process fails or an incompatible firmware image is used, the router may become soft-bricked.
Typical symptoms include:
Router LEDs behaving abnormally
No web interface available
Router not assigning IP addresses
Router stuck during boot
Only bootloader recovery available
Fortunately, many Cudy routers include a TFTP recovery mode, which allows firmware to be reinstalled directly during boot.
Recovery Method Overview
The recovery method works by:
- Running a TFTP server on your computer
- Setting a static IP address
- Powering on the router while holding the reset button
- The router requests firmware from the TFTP server
- The firmware is uploaded and installed automatically
Requirements
Before starting, prepare the following:
Hardware
- Cudy router (in my case WR3000)
- Ethernet cable
- Computer (MacBook in this guide)
*If your computer is windows, then follow this: https://www.cudy.com/en-apac/blogs/faq/how-to-recovery-the-cudy-router-from-openwrt-firmware-to-cudy-official-firmware?page=2
Software
Files
Step 1 — Install the TFTP Server on macOS
Download the macOS version of the SoftPerfect toolkit.
After installation:
- Open the TFTP Server application
- The software automatically creates a folder on the Desktop called: TFTP
This folder becomes the root directory for firmware transfer.
Step 2 — Prepare the Firmware File
From the Cudy Firmware Download Page:
- Download the latest firmware for your router model.
- The firmware will usually be downloaded as a ZIP archive.
- Extract the ZIP file.
- Locate the firmware .bin file.
- Now rename the firmware file to: 'recovery.bin'
This filename is critical because the router bootloader specifically looks for this name during TFTP recovery.
Move the file into the Desktop → TFTP folder created by the server.
Step 3 — Connect Router to Your Mac
- Power OFF the router.
- Connect your Mac to the router using an Ethernet cable.
- Plug the cable into a LAN port on the router.
Important note:
- Most Cudy routers use LAN port for recovery.
- The TR1200 model is an exception and requires the WAN port.
Step 4 — Configure a Static IP Address
The router expects the recovery computer to use a specific IP.
On macOS: System Settings → Network
Select your Ethernet interface, then configure manually:
Setting | Value |
|---|---|
IP Address | 192.168.1.88 |
Subnet Mask | 255.255.255.0 |
Gateway | Leave blank |
*Important: Also temporarily disable the firewall to avoid blocking TFTP traffic.
Step 5 — Start the TFTP Server
Open the SoftPerfect TFTP Server application and click: Start Server
Ensure that:
- The server is running
- The recovery.bin file is inside the TFTP folder
Step 6 — Enter Router Recovery Mode
This step triggers the bootloader recovery.
- Locate the RESET button on the router.
- Press and hold the RESET button.
- While still holding RESET: Power ON the router
- Continue holding RESET until:
- The router LEDs flash rapidly, or
- The TFTP transfer starts
Once the firmware download begins, you can release the RESET button.
Step 7 — Firmware Transfer
If everything is configured correctly:
- The router will automatically request recovery.bin
- The TFTP server will begin transferring the firmware
- You will see successful transfer logs in the TFTP application
During this stage:
- Do NOT unplug the router
- Do NOT interrupt the process
The router will flash the firmware internally.
Step 8 — Wait for Firmware Installation
LED indicators help determine progress:
LED Behavior | Meaning |
|---|---|
Fast flashing | Firmware downloading |
Slow flashing | Firmware installing |
Normal boot | Recovery completed |
Once the lights stabilize, the router will automatically reboot.
Step 9 — Restore Network Settings
After recovery: Change your Mac’s network settings back to DHCP (Automatic IP).
Or manually configure:
IP Address: 192.168.10.12
Subnet: 255.255.255.0
Gateway: 192.168.10.1
The router’s default gateway after recovery is usually: 192.168.10.1
Step 10 — Access the Router Interface
After reboot:
The router begins broadcasting Wi-Fi again.
Default Cudy SSIDs appear on nearby devices.
Open your browser and visit: http://192.168.10.1
You should now see the Cudy router login page.
At this moment I realized the recovery had worked — the router was fully unbricked.
Why This Recovery Works
Most modern routers include a bootloader-level recovery system.
During startup, the bootloader:
- Searches for a TFTP server
- Requests a predefined file name (recovery.bin)
- Downloads and flashes the firmware
Because this happens before the operating system loads, even a completely broken firmware can be repaired.
Troubleshooting Tips
If recovery fails:
- Check File Name: The firmware must be exactly: recovery.bin
- Verify Static IP: Your computer must use: 192.168.1.88
- Check TFTP Folder: The firmware must be inside the TFTP server directory.
- Disable Firewall: Firewalls may block UDP port 69 used by TFTP.
- Use LAN Port: Unless using TR1200, recovery uses a LAN port.
Lessons Learned
Bricking a router can feel like the device is permanently destroyed, but in many cases it is recoverable.
Key takeaways from my experience:
Always verify firmware compatibility
Keep a copy of official firmware
Understand TFTP recovery procedures
Avoid interrupting firmware upgrades
Most importantly: don’t panic — many routers have recovery modes.
Final Thoughts
Recovering my router after flashing OpenWrt back to official Cudy firmware was frustrating at first, especially while working on macOS where most guides focus on Windows.
However, once the correct TFTP configuration, static IP, and recovery sequence were followed, the process worked perfectly.
If you accidentally brick your Cudy router while experimenting with firmware, this guide should help you bring it back to life.
Sometimes the difference between a “dead router” and a working one is simply knowing the recovery process.
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