Mi Home IoT Development Board Alternative | Mi Home IoT Module Debugging Demo Board

The cover image is from a community user; the project has not been actually verified!
Log
2023/12/23: Redrawn the schematic of the official development board; PCB replica of the official development board with minimal adjustments.
2024/01/25: Draw a demo board for easy debugging.
2024/01/29: Demo board debugging and soldering tests passed.
Features : The dimensions

of the replicated development board
are kept as consistent as possible with the official development board;
all resistors and capacitors use 06030402 packages, making manual soldering user-friendly;
silkscreen markings for corresponding pins are added to the back for easy identification. All resistors and capacitors


in the demo
board use 06030402 packages, making manual soldering user-friendly;
Type-C interface for easy versatility;
Added SL2.1A USB HUB chip, supporting log and command
serial port connections; Command serial port pin headers and jumpers are provided, with reserved pin headers for external modules.
Disadvantages: Forgot to reserve ground and power pin headers qwq.



Note:
2023/12/23
The author only redrawn the original schematic in LCSC EDA and then did a preliminary PCB design; it has not been actually verified.
Students with limited hands-on skills should proceed with caution when replicating this. For modules disassembling the official development board (
January 29, 2024) , it's recommended to use a hot air gun to heat the back of the module, then gently pry it off. Dragging the soldering iron from both sides won't work well because there's a small solder pad underneath. Due to time constraints, I forgot to include an external power connector. The project has been updated, but there aren't many changes, so this hasn't been verified. Attached are related links: Development Process , Firmware Development Guide, Serial Communication Protocol.