mBlock 3.4.12: The Essential Legacy Guide for STEAM Educators and Makers
1. Abandoned & No Future Support This is the biggest red flag. Makeblock no longer supports 3.4.12. It will never support Windows 11 perfectly, nor macOS beyond Catalina (32-bit support was dropped). If you encounter a bug, you are on your own. mblock 3.4.12
Pro Tip: In Edit > Arduino Mode Settings, you can select the exact board type (Uno, Mega, Nano) and the COM port. Save this configuration to avoid re-selecting every session. mBlock 3
Select Port: Click Connect > Serial Port and choose the COM port associated with your device. Arduino Mode Settings