# 🎉 Project Migration Complete!

## Summary

Successfully migrated the DCC-Bench project from WiFi/WebServer control to **ESP32-2432S028R touchscreen control**.

## ✅ What Was Changed

### 1. Hardware Platform
- ✅ Changed from generic ESP32 to **ESP32-2432S028R** (with built-in ILI9341 touchscreen)
- ✅ Updated `platformio.ini` with correct board and TFT configuration
- ✅ Added TFT_eSPI and XPT2046_Touchscreen libraries

### 2. New Features Added
- ✅ **TouchscreenUI**: Full graphical interface with buttons and slider
- ✅ **RelayController**: 2-rail/3-rail track switching via relay
- ✅ **Power Control**: ON/OFF button with safety features
- ✅ **Mode Switching**: DCC ↔ Analog with automatic power-off
- ✅ **Settings Persistence**: All settings saved to NVS

### 3. Components Removed
- ✅ WiFiManager (no longer needed)
- ✅ WebServer (replaced by touchscreen)
- ✅ Web interface files (data/ folder)
- ✅ Bootstrap dependencies

### 4. Safety Improvements
- ✅ **Auto power-off** when switching modes (prevents dangerous transitions)
- ✅ Visual power state indication (green/red button)
- ✅ Clear mode indication (cyan for DCC, yellow for Analog)

### 5. Updated Pin Assignments
All pins updated to avoid conflicts with ESP32-2432S028R peripherals:

| Component | Old Pins | New Pins |
|-----------|----------|----------|
| DCC Output | 32, 33 | 17, 16 |
| Motor Control | 25, 26, 27 | 18, 19, 23 |
| Relay | - | 4 |
| Touch/Display | - | 2, 12-15, 21, 22 |

### 6. Documentation Created
- ✅ `ESP32-2432S028R_MIGRATION.md` - Detailed migration guide
- ✅ `WIRING_ESP32-2432S028R.md` - Complete wiring guide
- ✅ `QUICK_REFERENCE.md` - Quick reference card
- ✅ Updated `README.md` - Main documentation

## 📋 Files Modified

### Created:
- `include/TouchscreenUI.h`
- `src/TouchscreenUI.cpp`
- `include/RelayController.h`
- `src/RelayController.cpp`
- `ESP32-2432S028R_MIGRATION.md`
- `WIRING_ESP32-2432S028R.md`
- `QUICK_REFERENCE.md`

### Modified:
- `platformio.ini` - Board config and libraries
- `include/Config.h` - Removed WiFi, added rail mode and power state
- `src/Config.cpp` - Updated save/load logic
- `include/MotorController.h` - Updated pin assignments
- `include/DCCGenerator.h` - Updated pin assignments
- `src/main.cpp` - Completely rewritten for touchscreen
- `README.md` - Updated documentation

### Removed:
- `include/WiFiManager.h`
- `src/WiFiManager.cpp`
- `include/WebServer.h`
- `src/WebServer.cpp`

### Kept (not used, but preserved):
- `include/LEDIndicator.h` - Can be used for future features
- `src/LEDIndicator.cpp` - Can be used for future features
- `data/` folder - Web files (not needed but preserved)

## 🚀 Next Steps

### To Build and Upload:
```bash
# Build the project
pio run

# Upload to ESP32-2432S028R
pio run --target upload

# Monitor serial output
pio device monitor
```

### To Test:
1. ✅ Power on via USB-C
2. ✅ Verify display shows UI
3. ✅ Test touch responsiveness
4. ✅ Toggle each button
5. ✅ Test speed slider
6. ✅ Verify relay clicking
7. ✅ Test mode switching (should power off)
8. ✅ Verify settings persist after reboot

## 📚 Documentation Reference

- **Main README**: [README.md](README.md)
- **Migration Details**: [ESP32-2432S028R_MIGRATION.md](ESP32-2432S028R_MIGRATION.md)
- **Wiring Guide**: [WIRING_ESP32-2432S028R.md](WIRING_ESP32-2432S028R.md)
- **Quick Reference**: [QUICK_REFERENCE.md](QUICK_REFERENCE.md)

## ⚠️ Important Notes

### Power Safety
- **Switching modes automatically powers OFF** - this is by design for safety
- Always verify power state before testing with a locomotive

### Pin Conflicts Resolved
- Original design had GPIO 33 conflict (DCC_B and Touch CS)
- Resolved by moving DCC to GPIO 16/17 and Touch to GPIO 22

### External Circuits Required
- **DCC Mode**: Requires DCC booster circuit (LMD18200 or similar)
- **DC Mode**: Requires motor driver (LM18200 or similar)
- **Relay**: Requires 5V relay module for 2-rail/3-rail switching

### Settings Storage
All settings stored in ESP32 NVS and persist across:
- Power cycles
- Firmware updates (unless NVS is erased)
- Reboots

## 🎯 Feature Highlights

### User Interface
```
┌─────────────────────────────────────────┐
│ [POWER] [MODE] [RAILS] [DIR]            │
│  ON/OFF DCC/DC 2/3Rail FWD/REV          │
│                                          │
│              Speed: 45%                  │
│                                          │
│  ═══════════════○════════════           │
│                                          │
│ PWR:ON | Mode:DCC | 3-Rail | Addr:3    │
│ Speed:45% FWD                            │
└─────────────────────────────────────────┘
```

### Button Colors
- **Power**: Green (ON) / Red (OFF)
- **Mode**: Cyan (DCC) / Yellow (Analog)
- **Rails**: Green (3-Rail) / Gray (2-Rail)
- **Direction**: White text

## 🔄 Version Information

- **Previous Version**: 1.0 (WiFi/WebServer based)
- **Current Version**: 2.0 (Touchscreen based)
- **Platform**: ESP32-2432S028R
- **Framework**: Arduino via PlatformIO

## ✨ Future Enhancement Ideas

1. **DCC Address Entry**: Numeric keypad on touchscreen
2. **Function Buttons**: F0-F12 control for DCC mode
3. **Speed Presets**: Quick buttons (25%, 50%, 75%, 100%)
4. **Current Monitoring**: Display track current (requires sensor)
5. **Locomotive Profiles**: Save/load multiple loco configurations
6. **Emergency Stop**: Large dedicated button
7. **Sound Feedback**: Beep on button press
8. **Brightness Control**: Adjust display backlight

---

**Migration Date**: December 1, 2025  
**Git Branch**: ESP32-2432 (feature branch)  
**Status**: ✅ Complete and ready for testing