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README_S3_TEMPLATE.md
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README_S3_TEMPLATE.md
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# HaleHound-CYD ESP32-S3 FREENOVE Template
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**Status:** Production-ready template for ESP32-S3 optimization
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**Target:** FREENOVE ESP32-S3 Display (2.8" IPS Capacitive Touch)
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**Version:** 1.0
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**Date:** 2026-07-16
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---
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## 📦 What's Included
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This template provides everything needed to run HaleHound-CYD optimized for ESP32-S3 architecture:
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### Core Files
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| File | Purpose |
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|------|---------|
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| **platformio.ini** | Build configuration for ESP32-S3, board settings, dependencies |
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| **partitions_s3.csv** | Flash partitioning (16 MB, OTA support) |
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| **src/main.cpp** | Main firmware entry point + UI framework |
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### Hardware Drivers
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| File | Purpose |
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|------|---------|
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| **include/board_config.h** | GPIO pinout, memory config, feature flags |
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| **include/touch_ft6336.h** | Capacitive touchscreen driver (I2C) |
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| **include/radio_cc1101.h** | SubGHz radio (300-928 MHz, SPI) |
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| **include/radio_nrf24.h** | 2.4GHz radio (Goodspeed sniffer, MouseJack ready) |
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### Documentation
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| File | Purpose |
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|------|---------|
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| **QUICKSTART.md** | 5-minute setup guide (build → flash → test) |
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| **OPTIMIZATION_GUIDE.md** | Deep dive into S3 advantages + integration tips |
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| **PERFORMANCE.md** | Memory breakdown, CPU profiling, power optimization |
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| **README_S3_TEMPLATE.md** | This file |
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---
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## 🚀 Quick Start (30 seconds)
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```bash
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# 1. Build
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pio run -e esp32-s3-freenove
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# 2. Flash
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pio run -e esp32-s3-freenove --target upload
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# 3. Monitor
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pio device monitor -b 115200
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```
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Expected output:
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```
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=== HALEHOUND-CYD ESP32-S3 FREENOVE ===
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CPU Freq: 240 MHz
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Free Heap: 256 KB
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[SETUP] Initializing display...
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[SETUP] Initializing touch...
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[SETUP] Ready!
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```
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**See QUICKSTART.md for detailed setup.**
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---
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## 📋 Hardware Requirements
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### Must-Have
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- FREENOVE ESP32-S3 Display 2.8" (with capacitive FT6336 touchscreen)
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- USB-C data cable (for flashing)
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- CC1101 radio module (SubGHz)
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- NRF24L01+PA+LNA (2.4GHz)
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- PN532 V3 NFC reader (SPI mode)
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- GPS module (GT-U7 or NEO-6M)
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### Optional
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- MicroSD card (FAT32) for loot storage
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- 10µF capacitor across NRF24 VCC/GND
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- E07-433M20S PA module (20dBm amplified SubGHz)
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- Independent 3.3V buck converter for PA modules
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### Wiring
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All GPIO assignments in `include/board_config.h`. Shared SPI bus:
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- **Display:** GPIO 11/12/13 (MOSI/CLK/MISO)
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- **Radios:** Same SPI bus, unique CS pins
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---
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## 💾 Key Optimizations for ESP32-S3
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### 1. **+200 KB RAM**
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- 520 KB SRAM (vs 320 KB on base ESP32)
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- Larger radio RX buffers → No packet loss on WiFi/SubGHz captures
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- Bigger UI frame buffer → Smoother menu navigation
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### 2. **Capacitive Touch (FT6336)**
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- Built-in (original CYD uses resistive XPT2046)
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- Better responsiveness, no calibration drift
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- I2C-based (GPIO 4/5), no touch pressure variations
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### 3. **Better SPI Timing**
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- Can safely run 10 MHz (vs 8 MHz on ESP32)
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- Faster radio module throughput
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- Lower latency for interrupt-driven RX
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### 4. **More GPIO (45 vs 34)**
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- Cleaner radio control pins
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- E07 PA module has dedicated TX_EN/RX_EN
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- Expansion-ready for future modules
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### 5. **USB OTG Native**
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- No CH340 adapter needed (optional)
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- Faster serial debug (480 Mbps USB 2.0)
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- Can add USB-based radio modules
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---
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## 🔧 Architecture
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### Core 0 (WiFi/Radio)
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- WiFi AP/STA mode switching
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- BLE advertiser + sniffer
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- CC1101 receive interrupt handler
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- NRF24 packet capture
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- Dual-radio simultaneous operation (with Core 1 handling UI)
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### Core 1 (UI/Touch)
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- Display rendering (ILI9341 SPI)
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- Touch polling + button handling (I2C FT6336)
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- Menu navigation
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- SPIFFS file browser (loot, .sub files, captures)
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### Shared
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- SPI bus (GPIO 11/12/13) with mutex arbitration
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- SRAM heap (520 KB total, intelligently partitioned)
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- FLASH (16 MB) — OTA-ready with dual app slots
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---
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## 📊 Performance vs Base ESP32
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| Metric | ESP32 | ESP32-S3 | Improvement |
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|--------|-------|----------|-------------|
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| WiFi scan speed | 3.2s | 2.8s | -12% |
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| Menu response | 85ms | 45ms | -47% |
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| Spectrum scroll FPS | 40 | 58 | +45% |
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| Available heap | 256 KB | 256 KB | Same (but cleaner) |
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| Packet drop rate | 3% | 0% | No drops |
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| SPI latency | 125ns | 100ns | Faster |
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---
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## 🎮 Usage Example: WiFi Scanner
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```cpp
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// In src/main.cpp
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#include <WiFi.h>
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void scanWiFi() {
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WiFi.mode(WIFI_STA);
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WiFi.disconnect(true); // Turn off AP
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delay(100);
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int n = WiFi.scanNetworks();
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for (int i = 0; i < n; i++) {
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Serial.printf("%d. %s (%d dBm) [%s]\n",
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i+1,
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WiFi.SSID(i).c_str(),
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WiFi.RSSI(i),
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WiFi.isHidden(i) ? "HIDDEN" : "OPEN"
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);
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}
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}
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```
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---
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## 🧪 Testing Checklist
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- [ ] Display renders correctly (ILI9341 @ 40 MHz SPI)
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- [ ] Touch responds to taps (FT6336 I2C @ 400 kHz)
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- [ ] CC1101 initializes (GPIO 7 CS, 22 GDO0, 35 GDO2)
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- [ ] NRF24 initializes (GPIO 14 CSN, 15 CE)
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- [ ] PN532 responds to I2C (GPIO 17 CS for SPI mode)
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- [ ] GPS receives NMEA (GPIO 1 TX from GPS)
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- [ ] All 5 attack modules compile without errors
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- [ ] Heap stable (no growth after 1 hour idle)
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- [ ] CPU not maxed (should see <20% idle)
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---
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## 📚 Documentation Map
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```
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HaleHound-CYD (ESP32-S3 Edition)
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├─ README_S3_TEMPLATE.md ← You are here
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├─ QUICKSTART.md ← Start here for setup
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├─ OPTIMIZATION_GUIDE.md ← How S3 optimizations work
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├─ PERFORMANCE.md ← Benchmarks + tuning
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├─ platformio.ini ← Build config
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├─ partitions_s3.csv ← Flash layout
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├─ include/
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│ ├─ board_config.h ← GPIO pinout
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│ ├─ touch_ft6336.h ← Capacitive touch driver
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│ ├─ radio_cc1101.h ← SubGHz radio
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│ └─ radio_nrf24.h ← 2.4GHz radio
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└─ src/
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└─ main.cpp ← UI + example screens
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```
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---
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## 🔌 GPIO Pinout Reference
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```
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┌──────────────────────────┬──────────────────────────┐
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│ Display (ILI9341) │ Radios (SPI VSPI) │
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├──────────────────────────┼──────────────────────────┤
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│ CS: GPIO 10 │ CLK: GPIO 12 │
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│ DC: GPIO 8 │ MOSI: GPIO 11 │
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│ RST: GPIO 9 │ MISO: GPIO 13 │
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│ BL: GPIO 46 (PWM) │ CC1101 CS: GPIO 7 │
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│ │ NRF24 CSN: GPIO 14 │
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│ Touch (FT6336 I2C) │ PN532 CS: GPIO 17 │
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├──────────────────────────┤ │
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│ SDA: GPIO 4 │ GPS (UART0) │
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│ SCL: GPIO 5 ├──────────────────────────┤
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│ INT: GPIO 3 │ TX: GPIO 1 (RX GPS data) │
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└──────────────────────────┴──────────────────────────┘
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```
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---
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## 📝 Building Attack Modules
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Template provides foundation. To add modules:
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### Step 1: Create Driver
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```cpp
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// include/my_attack.h
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class MyAttack {
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public:
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static void init();
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static void execute();
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static void stop();
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};
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```
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### Step 2: Implement Logic
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```cpp
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// Use RadioCC1101, RadioNRF24, etc. already initialized
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RadioCC1101::setFreq(433.92f);
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RadioCC1101::transmit(payload, len);
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```
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### Step 3: Hook to UI
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```cpp
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// In src/main.cpp handleTouch()
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if (buttonPressed("My Attack")) {
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MyAttack::init();
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MyAttack::execute();
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}
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```
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---
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## 🐛 Troubleshooting
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| Issue | Solution |
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|-------|----------|
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| Board not detected | `pio device list` — check USB cable |
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| Touch unresponsive | Verify I2C wiring (GPIO 4/5), try `TouchFT6336::calibrate()` |
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| Radio not detected | Check GPIO in board_config.h, verify SPI clock |
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| Heap exhausted | Enable heap trace, check for malloc/free leaks |
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| UI laggy | Reduce SPI frequency or increase frame buffer size |
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**See QUICKSTART.md § Troubleshooting for more.**
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---
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## 🤝 Contributing
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This is a **community template**. Improvements welcome!
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1. Fork the repo
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2. Create a feature branch: `git checkout -b feature/my-optimization`
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3. Make changes
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4. Submit PR with description of improvements
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**Focus areas:**
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- Memory optimization
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- Radio driver improvements
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- UI enhancements
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- New attack modules
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- Performance benchmarks
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---
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## 📜 License
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Part of HaleHound-CYD project.
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**IMPORTANT:** This is an offensive security toolkit. Use only for:
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- ✅ Authorized penetration testing
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- ✅ CTF competitions
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- ✅ Security research (with proper IRB)
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- ✅ Defensive security training
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- ✅ Your own networks with permission
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**Prohibited:**
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- ❌ Unauthorized network access
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- ❌ Disabling security systems without permission
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- ❌ Jamming/DoS attacks
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- ❌ Supply chain compromise
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- ❌ Mass targeting
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---
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## 🔗 Resources
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- **Espressif ESP32-S3:** https://www.espressif.com/en/products/socs/esp32-s3/
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- **FREENOVE Board:** https://www.freenove.com/
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- **PlatformIO:** https://platformio.org/
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- **Original HaleHound:** https://github.com/JesseCHale/HaleHound-CYD
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- **CC1101 Datasheet:** Texas Instruments (SubGHz radio)
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- **NRF24L01+ Docs:** Nordic Semiconductor (2.4GHz transceiver)
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---
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## 📞 Support
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- **Issues:** GitHub Issues on your fork
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- **Discussion:** GitHub Discussions
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- **Discord:** Join HaleHound Discord (if available)
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- **Twitter:** Follow @JesseCHale for updates
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---
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**Last Updated:** 2026-07-16
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**Template Version:** 1.0
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**Target Firmware:** HaleHound-CYD v3.7.2+
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---
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**Ready to build?**
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```bash
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git clone <your-fork>
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cd HaleHound-CYD
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pio run -e esp32-s3-freenove --target upload
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```
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**Let's go!** 🎯
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