DCC-Bench/MIGRATION_COMPLETE.md

🎉 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:

# 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
• Migration Details: ESP32-2432S028R_MIGRATION.md
• Wiring Guide: WIRING_ESP32-2432S028R.md
• Quick Reference: 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

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