DFU recovery - JetKVM

DFU (Device Firmware Update) mode reinstalls JetKVM firmware over USB. Use it to recover a JetKVM with no microSD card slot. With a slot, use microSD recovery; for JetKVM Mini, see JetKVM Mini recovery.

Recovery erases your settings and stored data. Back up anything you need before starting.

You need a computer, a USB data cable, and a thin pin. Connect JetKVM directly to the computer with the data cable.

Download the recovery image

DFU recovery imageFor the original JetKVM, without a card slot.

Enter DFU mode

Unplug the USB cable from JetKVM.
Locate the small hole on the right side of the device.
Insert a thin pin into the hole and gently press and hold the button inside.
While holding the button, reconnect JetKVM's USB cable to your computer.
Keep holding for three seconds, then release.

The recovery tool should detect a MASKROM device.

Flash the firmware

Install the USB driver

Download Driver Assistant:Driver Assistant v5.14
Right-click the ZIP and choose Extract All.
In the extracted folder, open DriverInstall.exe. Click Yes when Windows asks for permission.
Click Install Driver and wait until it's done.

Driver Assistant with the Install Driver button

Open RKDevTool

Download RKDevTool:RKDevTool v3.37
Right-click the ZIP and choose Extract All.
In the extracted folder, open RKDevTool.exe.
Click the Upgrade Firmware tab.

RKDevTool v3.37 with the Upgrade Firmware tab selected and the Firmware and Upgrade buttons visible

Flash the firmware

The bottom left should say Found One MASKROM Device. If not, see Device not detected.
Click Firmware and select the .img file from step 1.
Chip Info should show RK1106.

RKDevTool with the JetKVM recovery image loaded in the Upgrade Firmware tab

Click Upgrade. Keep JetKVM connected and the computer awake.
Wait for Download Firmware Success in the log. JetKVM restarts, so the bottom left now says No Devices Found. That's expected.

RKDevTool showing Download Firmware Success after recovery

Download and extract upgrade_tool:upgrade_tool v2.44 for macOS
Open Terminal and change to the extracted folder containing upgrade_tool:
Terminal
```
$ cd "/path/to/extracted/folder"
```
Check that JetKVM is detected:
Terminal
```
$ sudo ./upgrade_tool ld
```
Flash the image, replacing the path with your downloaded .img file:
Terminal
```
$ sudo ./upgrade_tool uf "/path/to/your/firmware.img"
```

Wait for Upgrade firmware ok. before disconnecting USB.

Clone the JetKVM system repository and enter the tool directory:jetkvm/rv1106-system

Terminal

$ git clone https://github.com/jetkvm/rv1106-system.git$ cd rv1106-system/tools/linux/Linux_Upgrade_Tool

Check that JetKVM is detected:
Terminal
```
$ sudo ./upgrade_tool ld
```
Flash the image, replacing the path with your downloaded .img file:
Terminal
```
$ sudo ./upgrade_tool uf "/path/to/your/firmware.img"
```

Wait for Upgrade firmware ok. before disconnecting USB.

Troubleshooting

Device not detected

Hold the button before plugging in USB, and for three seconds after.
Use another data cable or port, not a hub.
On Windows, reinstall the driver with Driver Assistant, then reconnect and reopen RKDevTool.
Unplug any other Rockchip device in recovery mode.

Windows blocks a download

Leave the file quarantined and keep Defender enabled. Use the Linux or macOS instructions instead.

Flashing fails

If the image will not load, download it again from step 1 and select it under Upgrade Firmware → Firmware.

If flashing fails, save the error message, check the USB cable, and re-enter DFU mode before retrying.