Fixed: Mblock 3.4.12

Choose a sprite, drag "when green flag clicked" and "move 10 steps" to create animations.

The interface of mBlock 3.4.12 is strategically divided into four primary zones designed to streamline the workflow from logic design to hardware deployment. 1. Stage and Sprite Management

Click Connect > Serial Port and choose the COM port associated with your device. mblock 3.4.12

The LED should now blink on and off every second. Congratulations! You have just used mBlock 3.4.12 for physical computing.

Even great software has quirks. Here is a troubleshooting table for version 3.4.12: Choose a sprite, drag "when green flag clicked"

If the COM port does not appear under the Connect menu, the operating system cannot communicate with the hardware's USB-to-Serial chip.

Go to the yellow category and snap a forever loop directly underneath the cap block. Stage and Sprite Management Click Connect > Serial

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.