I don't think RT-Thread Studio IDE supports Raspberry Pi4, but it does support the PICO.
However, you can try to use RT-Thread Env to develop the Raspberry PI4, here's the tutorial video you may need to check first: https://youtu.be/dEK94o_YoSo
it's quite easy to get started.
This is how I used RT-Thread ENV to build for Raspberry Pi 4:
https://youtu.be/Gz9amRmX0DY
Hi,
Yes, it is possible to develop for the Raspberry Pi 4 using RT-Thread Studio, but there is an important limitation: the Raspberry Pi 4 BSP is not currently included in the default SDK Manager packages of RT-Thread Studio 2.1.5.
https://youtu.be/Gz9amRmX0DY
To use RT-Thread with the Raspberry Pi 4, you generally need to manually import the BSP from the RT-Thread source repository instead of installing it through the SDK Manager.
