Initial KiCad project

README.md

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+# Midea AC Controller PCB Design
+
+This folder contains the KiCad project files and documentation for the custom Midea AC Controller PCB with BLE beacon capabilities.
+
+## Project Structure
+
+```
+PCB_Board/
+├── Midea_ESP/                    # KiCad project folder
+│   ├── Midea_ESP.kicad_pro       # KiCad project file
+│   ├── Midea_ESP.kicad_sch       # Schematic file
+│   ├── Midea_ESP.kicad_pcb       # PCB layout file
+│   ├── libs/                     # Custom component library
+│   │   └── Midea_AC_Controller.kicad_sym  # Custom symbols
+│   ├── LIBRARY_SETUP.md          # How to add libraries
+│   └── COMPONENT_REFERENCE.md    # Component quick reference
+├── DESIGN_SPEC.md                 # Complete design specification
+├── KICAD_GUIDE.md                # Step-by-step KiCad guide
+└── SCHEMATIC_CONNECTIONS.txt     # Detailed connection list
+```
+
+## Quick Start
+
+1. **Setup Libraries**: See `Midea_ESP/LIBRARY_SETUP.md`
+2. **Read Design Spec**: See `DESIGN_SPEC.md`
+3. **Create Schematic**: Follow `KICAD_GUIDE.md`
+4. **Reference Connections**: Use `SCHEMATIC_CONNECTIONS.txt`
+
+## Key Components
+
+- **ESP32-WROOM-32E**: Main microcontroller (WiFi + BLE)
+- **TXB0104PWR**: Logic level shifter (3.3V ↔ 5V)
+- **AMS1117-3.3**: Voltage regulator
+- **JST-XH Connector**: Midea AC interface
+
+## Documentation Files
+
+- `DESIGN_SPEC.md`: Complete hardware design specification
+- `KICAD_GUIDE.md`: Detailed KiCad schematic and PCB guide
+- `SCHEMATIC_CONNECTIONS.txt`: Pin-to-pin connection reference
+- `Midea_ESP/LIBRARY_SETUP.md`: Library setup instructions
+- `Midea_ESP/COMPONENT_REFERENCE.md`: Component quick reference
+