Hello,
I am trying to boot a custom linux image with tftpboot with uboot, because I have multiple boards connected to my network.
I am able to ping my tftp server, but I don't know where to load the kernel.
Can someone help me with the setup please?
Thank you.

Thank you for your prompt response.
This worked for me:
- unplug the board
- keep pressing the boot button
- replug the board
```
Bus 003 Device 074: ID 2207:110c Fuzhou Rockchip Electronics Company

./upgrade_tool ld
Using /luckfox-pico/tools/linux/Linux_Upgrade_Tool/config.ini
List of rockusb ...

Hi, I have 2 pico pro boards connected to my ubuntu 22 machine. I am unable to list the devices using upgrade_tool!
```
Bus 003 Device 069: ID 2207:0019 Fuzhou Rockchip Electronics Company rk3xxx
```
```
sudo ./upgrade_tool -ld
Using /---/upgrade_tool_v2.17_for_linux/config.ini
No found any rockusb ...