Comparison
Robin nano V3 is an upgraded version of Robin Nano V2.0. The upgrade changes are quite large, including upgrading the MCU to the M4 core, and adding support for USB disk.
*Note: As MKS Robin Nano V2.0 doesn't has an independent serial port, so if using with the MKS H43, V2.0 cannot work with Wifi module, but V3.0 can make it.
The hardware design is openned source on : https://github.com/makerbase-mks/MKS-Robin-Nano-V3.X/tree/main/hardware
The same as the Robin Nano V2.0, firmware of MKS Robin Nano V3.0 is also based on Marlin 2.X. Actually, we directly use the same respository:https://github.com/makerbase-mks/Mks-Robin-Nano-Marlin2.0-Firmware. Just modify the type of motherboard to compile the related firmware.