Recovery Pins
The Radxa ROCK 4D features dedicated Recovery pins for entering Loader mode.

User Guide
Entering Loader Mode
Before powering on the board, short the Recovery pins using a jumper cap or DuPont wires. The short can be removed after powering on.
Verifying Device Mode
Use the RKDevTool utility to verify if the device has entered Loader mode.
tip
For instructions on using RKDevTool, please refer to the RKDevTool Guide tutorial.
Normally, the RKDevTool software will automatically detect the current mode of the ROCK 4D board. If the device is not detected, please repeat the above steps.
- Windows
- Linux/MacOS
Open the RKDevTool software to view the detected device information:

Use the rkdeveloptool ld
command to view the detected device information:
Linux/MacOS-Host$
sudo rkdeveloptool ld
Example output showing a detected Loader device:
Linux/MacOS-Host$
DevNo=1 Vid=0x2207,Pid=0x350e,LocationID=109 Loader