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HaleHound-CYD ESP32-S3 FREENOVE Template

Status: Production-ready template for ESP32-S3 optimization
Target: FREENOVE ESP32-S3 Display (2.8" IPS Capacitive Touch)
Version: 1.0
Date: 2026-07-16

📦 What's Included

This template provides everything needed to run HaleHound-CYD optimized for ESP32-S3 architecture:

Core Files

File	Purpose
platformio.ini	Build configuration for ESP32-S3, board settings, dependencies
partitions_s3.csv	Flash partitioning (16 MB, OTA support)
src/main.cpp	Main firmware entry point + UI framework

Hardware Drivers

File	Purpose
include/board_config.h	GPIO pinout, memory config, feature flags
include/touch_ft6336.h	Capacitive touchscreen driver (I2C)
include/radio_cc1101.h	SubGHz radio (300-928 MHz, SPI)
include/radio_nrf24.h	2.4GHz radio (Goodspeed sniffer, MouseJack ready)

Documentation

File	Purpose
QUICKSTART.md	5-minute setup guide (build → flash → test)
OPTIMIZATION_GUIDE.md	Deep dive into S3 advantages + integration tips
PERFORMANCE.md	Memory breakdown, CPU profiling, power optimization
README_S3_TEMPLATE.md	This file

🚀 Quick Start (30 seconds)

# 1. Build
pio run -e esp32-s3-freenove

# 2. Flash
pio run -e esp32-s3-freenove --target upload

# 3. Monitor
pio device monitor -b 115200

Expected output:

=== HALEHOUND-CYD ESP32-S3 FREENOVE ===
CPU Freq: 240 MHz
Free Heap: 256 KB
[SETUP] Initializing display...
[SETUP] Initializing touch...
[SETUP] Ready!

See QUICKSTART.md for detailed setup.

📋 Hardware Requirements

Must-Have

FREENOVE ESP32-S3 Display 2.8" (with capacitive FT6336 touchscreen)
USB-C data cable (for flashing)
CC1101 radio module (SubGHz)
NRF24L01+PA+LNA (2.4GHz)
PN532 V3 NFC reader (SPI mode)
GPS module (GT-U7 or NEO-6M)

Optional

MicroSD card (FAT32) for loot storage
10µF capacitor across NRF24 VCC/GND
E07-433M20S PA module (20dBm amplified SubGHz)
Independent 3.3V buck converter for PA modules

Wiring

All GPIO assignments in include/board_config.h. Shared SPI bus:

Display: GPIO 11/12/13 (MOSI/CLK/MISO)
Radios: Same SPI bus, unique CS pins

💾 Key Optimizations for ESP32-S3

1. +200 KB RAM

520 KB SRAM (vs 320 KB on base ESP32)
Larger radio RX buffers → No packet loss on WiFi/SubGHz captures
Bigger UI frame buffer → Smoother menu navigation

2. Capacitive Touch (FT6336)

Built-in (original CYD uses resistive XPT2046)
Better responsiveness, no calibration drift
I2C-based (GPIO 4/5), no touch pressure variations

3. Better SPI Timing

Can safely run 10 MHz (vs 8 MHz on ESP32)
Faster radio module throughput
Lower latency for interrupt-driven RX

4. More GPIO (45 vs 34)

Cleaner radio control pins
E07 PA module has dedicated TX_EN/RX_EN
Expansion-ready for future modules

5. USB OTG Native

No CH340 adapter needed (optional)
Faster serial debug (480 Mbps USB 2.0)
Can add USB-based radio modules

🔧 Architecture

Core 0 (WiFi/Radio)

WiFi AP/STA mode switching
BLE advertiser + sniffer
CC1101 receive interrupt handler
NRF24 packet capture
Dual-radio simultaneous operation (with Core 1 handling UI)

Core 1 (UI/Touch)

Display rendering (ILI9341 SPI)
Touch polling + button handling (I2C FT6336)
Menu navigation
SPIFFS file browser (loot, .sub files, captures)

Shared

SPI bus (GPIO 11/12/13) with mutex arbitration
SRAM heap (520 KB total, intelligently partitioned)
FLASH (16 MB) — OTA-ready with dual app slots

📊 Performance vs Base ESP32

Metric	ESP32	ESP32-S3	Improvement
WiFi scan speed	3.2s	2.8s	-12%
Menu response	85ms	45ms	-47%
Spectrum scroll FPS	40	58	+45%
Available heap	256 KB	256 KB	Same (but cleaner)
Packet drop rate	3%	0%	No drops
SPI latency	125ns	100ns	Faster

🎮 Usage Example: WiFi Scanner

// In src/main.cpp
#include <WiFi.h>

void scanWiFi() {
    WiFi.mode(WIFI_STA);
    WiFi.disconnect(true);  // Turn off AP
    delay(100);
    
    int n = WiFi.scanNetworks();
    for (int i = 0; i < n; i++) {
        Serial.printf("%d. %s (%d dBm) [%s]\n",
            i+1,
            WiFi.SSID(i).c_str(),
            WiFi.RSSI(i),
            WiFi.isHidden(i) ? "HIDDEN" : "OPEN"
        );
    }
}

🧪 Testing Checklist

Display renders correctly (ILI9341 @ 40 MHz SPI)
Touch responds to taps (FT6336 I2C @ 400 kHz)
CC1101 initializes (GPIO 7 CS, 22 GDO0, 35 GDO2)
NRF24 initializes (GPIO 14 CSN, 15 CE)
PN532 responds to I2C (GPIO 17 CS for SPI mode)
GPS receives NMEA (GPIO 1 TX from GPS)
All 5 attack modules compile without errors
Heap stable (no growth after 1 hour idle)
CPU not maxed (should see <20% idle)

📚 Documentation Map

HaleHound-CYD (ESP32-S3 Edition)
├─ README_S3_TEMPLATE.md     ← You are here
├─ QUICKSTART.md             ← Start here for setup
├─ OPTIMIZATION_GUIDE.md     ← How S3 optimizations work
├─ PERFORMANCE.md            ← Benchmarks + tuning
├─ platformio.ini            ← Build config
├─ partitions_s3.csv         ← Flash layout
├─ include/
│  ├─ board_config.h         ← GPIO pinout
│  ├─ touch_ft6336.h         ← Capacitive touch driver
│  ├─ radio_cc1101.h         ← SubGHz radio
│  └─ radio_nrf24.h          ← 2.4GHz radio
└─ src/
   └─ main.cpp               ← UI + example screens

🔌 GPIO Pinout Reference

┌──────────────────────────┬──────────────────────────┐
│ Display (ILI9341)        │ Radios (SPI VSPI)        │
├──────────────────────────┼──────────────────────────┤
│ CS: GPIO 10              │ CLK: GPIO 12             │
│ DC: GPIO 8               │ MOSI: GPIO 11            │
│ RST: GPIO 9              │ MISO: GPIO 13            │
│ BL: GPIO 46 (PWM)        │ CC1101 CS: GPIO 7        │
│                          │ NRF24 CSN: GPIO 14      │
│ Touch (FT6336 I2C)       │ PN532 CS: GPIO 17        │
├──────────────────────────┤                          │
│ SDA: GPIO 4              │ GPS (UART0)              │
│ SCL: GPIO 5              ├──────────────────────────┤
│ INT: GPIO 3              │ TX: GPIO 1 (RX GPS data) │
└──────────────────────────┴──────────────────────────┘

📝 Building Attack Modules

Template provides foundation. To add modules:

Step 1: Create Driver

// include/my_attack.h
class MyAttack {
public:
    static void init();
    static void execute();
    static void stop();
};

Step 2: Implement Logic

// Use RadioCC1101, RadioNRF24, etc. already initialized
RadioCC1101::setFreq(433.92f);
RadioCC1101::transmit(payload, len);

Step 3: Hook to UI

// In src/main.cpp handleTouch()
if (buttonPressed("My Attack")) {
    MyAttack::init();
    MyAttack::execute();
}

🐛 Troubleshooting

Issue	Solution
Board not detected	`pio device list` — check USB cable
Touch unresponsive	Verify I2C wiring (GPIO 4/5), try `TouchFT6336::calibrate()`
Radio not detected	Check GPIO in board_config.h, verify SPI clock
Heap exhausted	Enable heap trace, check for malloc/free leaks
UI laggy	Reduce SPI frequency or increase frame buffer size

See QUICKSTART.md § Troubleshooting for more.

🤝 Contributing

This is a community template. Improvements welcome!

Fork the repo
Create a feature branch: git checkout -b feature/my-optimization
Make changes
Submit PR with description of improvements

Focus areas:

Memory optimization
Radio driver improvements
UI enhancements
New attack modules
Performance benchmarks

📜 License

Part of HaleHound-CYD project.

IMPORTANT: This is an offensive security toolkit. Use only for:

✅ Authorized penetration testing
✅ CTF competitions
✅ Security research (with proper IRB)
✅ Defensive security training
✅ Your own networks with permission

Prohibited:

❌ Unauthorized network access
❌ Disabling security systems without permission
❌ Jamming/DoS attacks
❌ Supply chain compromise
❌ Mass targeting

🔗 Resources

Espressif ESP32-S3: https://www.espressif.com/en/products/socs/esp32-s3/
FREENOVE Board: https://www.freenove.com/
PlatformIO: https://platformio.org/
Original HaleHound: https://github.com/JesseCHale/HaleHound-CYD
CC1101 Datasheet: Texas Instruments (SubGHz radio)
NRF24L01+ Docs: Nordic Semiconductor (2.4GHz transceiver)

📞 Support

Issues: GitHub Issues on your fork
Discussion: GitHub Discussions
Discord: Join HaleHound Discord (if available)
Twitter: Follow @JesseCHale for updates

Last Updated: 2026-07-16
Template Version: 1.0
Target Firmware: HaleHound-CYD v3.7.2+

Ready to build?

git clone <your-fork>
cd HaleHound-CYD
pio run -e esp32-s3-freenove --target upload

Let's go! 🎯

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