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Multi-protocol offensive security toolkit for the ESP32 Cheap Yellow Display
Version v3.5.5 | By JesseCHale | HaleHound.com
40+ attack modules across WiFi, Bluetooth, SubGHz, 2.4GHz, and NFC — all running on a $7 touchscreen dev board. External CC1101, NRF24L01+PA+LNA, PN532, and GPS modules plug into the CYD's breakout pins. Everything is touch-driven. All radios transmit at maximum power. No safety nets.
| Board | Build Target | Display | Touch | Status |
|---|---|---|---|---|
| ESP32-2432S028 (2.8") | esp32-cyd |
ILI9341 240x320 | XPT2046 Resistive | Fully Tested |
| QDtech E32R35T (3.5") | esp32-e32r35t |
ST7796 320x480 | XPT2046 Resistive | Fully Tested |
| QDtech E32R28T (2.8") | esp32-e32r28t |
ILI9341 240x320 | XPT2046 Resistive | Fully Tested |
| NM-RF-Hat (2.8") | esp32-cyd-hat |
ILI9341 240x320 | XPT2046 Resistive | Supported |
All UI scales automatically between 240x320 and 320x480. Pick your board, flash, done.
| Module | What It Does |
|---|---|
| CYD board (any above) | Base platform — ESP32 + touchscreen + SD card |
| CC1101 (HW-863 or E07-433M20S) | SubGHz radio: 300-928 MHz capture, replay, jam, brute force |
| NRF24L01+PA+LNA | 2.4GHz radio: BLE jam, WLAN jam, MouseJack, spectrum analysis |
| PN532 V3 (Elechouse, SPI mode) | NFC/RFID: card scan, read, clone, brute force, emulate |
| GPS (GT-U7 or NEO-6M) | Wardriving, Flock You geolocation, live satellite view |
The Ebyte PA modules (E07-433M20S and E01-2G4M27SX) draw too much current for the CYD's onboard 3.3V regulator. You must power them from a separate 5V→3.3V buck converter. Tap 5V from USB and step it down to 3.3V independently — do not share the CYD's 3.3V rail or you'll get brownouts, random resets, and failed radio init.
| Part | Example |
|---|---|
| 5V→3.3V buck converter | AMS1117-3.3 module, MP2307, or any 3.3V reg rated 500mA+ |
| Input | 5V from USB VBUS (before the CYD's regulator) |
| Output | 3.3V to E07 VCC and E01 VCC independently |
| Ground | Common ground with CYD — all GNDs must tie together |
The signal wires (SPI, CS, CE, GDO0, GDO2, TX_EN, RX_EN) still connect directly to ESP32 GPIOs — only VCC gets the independent supply.
| Component | Why |
|---|---|
| E07-433M20S PA module | 20dBm amplified SubGHz — serious range upgrade over stock CC1101 |
| 10uF capacitor | Across NRF24 VCC/GND — stops random resets on PA+LNA modules |
| MicroSD card (FAT32) | Loot storage, .sub files, wardriving logs, OTA updates |
| LiPo battery + boost | Portable operation |
HALEHOUND-CYD v3.5.5
│
├── WiFi
│ ├── Packet Monitor Real-time 802.11 frame capture + graph
│ ├── Beacon Spammer Flood fake SSIDs
│ ├── WiFi Deauther Scan → tap → disconnect all clients
│ ├── Probe Sniffer Capture probes → auto-spawn Evil Twin
│ ├── WiFi Scanner Scan APs → tap to Deauth or Clone
│ ├── Captive Portal GARMR Evil Twin credential harvester
│ ├── Station Scanner Find connected clients + deauth handoff
│ └── Auth Flood Flood AP with auth frames from random MACs
│
├── Bluetooth
│ ├── BLE Jammer NRF24 flood on BLE ad channels 37/38/39
│ ├── BLE Spoofer Multi-platform BLE pairing spam
│ ├── BLE Beacon Custom iBeacon / Eddystone broadcast
│ ├── BLE Predator GATT recon → clone device → honeypot trap
│ ├── WhisperPair CVE-2025-36911 — Fast Pair exploit
│ ├── Airoha RACE CVE-2025-20700 — link key extraction
│ └── Lunatic Fringe ──┐
│ ├── Tracker Scan │ Multi-platform BLE tracker scanner
│ ├── AirTag Detect │ Apple FindMy tracker detection
│ ├── Phantom Flood │ Fake FindMy advertisement flood
│ └── AirTag Replay │ Sniff + replay real AirTag identity
│
├── 2.4GHz (NRF24)
│ ├── Scanner Channel activity across 2400-2525 MHz
│ ├── Spectrum Analyzer Visual RF spectrum + AP-locked zoom
│ ├── NRF Sniffer Promiscuous packet capture (Goodspeed)
│ ├── MouseJack Wireless keyboard keystroke injection
│ ├── WLAN Jammer Broadband 2.4GHz disruption
│ └── Proto Kill Multi-protocol 2.4GHz attack suite
│
├── SubGHz (CC1101)
│ ├── Replay Attack Record + replay RF signals (300-928 MHz)
│ ├── Brute Force Automated code gen (Princeton/CAME/Nice/PT2262)
│ ├── SubGHz Jammer Wideband SubGHz disruption
│ ├── Spectrum Analyzer SubGHz RF spectrum display
│ ├── Saved Profile Load saved signals from SD
│ ├── Tesla Charge Open any Tesla charge port (US/EU/BOTH)
│ └── .Sub Read Flipper .sub file browser + transmitter
│
├── RFID (PN532)
│ ├── Card Scanner Detect + identify NFC/RFID cards
│ ├── Card Reader MIFARE sector data dump
│ ├── Card Clone Clone UID to writable card
│ ├── Key Brute Force MIFARE key A/B brute force
│ └── Card Emulate Replay captured card UID
│
├── Jam Detect
│ ├── WiFi Guardian Detect deauth floods
│ ├── SubGHz Sentinel Detect SubGHz carrier jamming
│ ├── 2.4GHz Watchdog Detect broadband 2.4GHz jamming
│ └── Full Spectrum All bands simultaneously
│
├── SIGINT
│ ├── EAPOL Capture WPA handshake + PMKID capture
│ ├── Karma Attack Auto-respond to all probes → portal
│ ├── Wardriving GPS-tagged AP scanning to SD
│ ├── Saved Captures Browse captured handshakes
│ ├── IoT Recon Automated LAN scanner + credential brute
│ ├── Loot Unified loot browser (5 categories)
│ └── Flock You Flock Safety ALPR camera detector
│
├── Tools
│ ├── Serial Monitor UART passthrough terminal
│ ├── Update Firmware OTA flash from SD card
│ ├── Touch Calibrate 4-corner calibration tool
│ ├── GPS Live satellite view + NMEA data
│ └── Radio Test Hardware verification + wiring diagrams
│
├── Settings
│ ├── Brightness Backlight PWM (10-255)
│ ├── Screen Timeout 30s / 1m / 2m / 5m / 10m / Never
│ ├── Swap Colors BGR ↔ RGB panel toggle
│ ├── Invert Display Inverted color toggle
│ ├── Color Mode Default / Colorblind / High Contrast
│ ├── Rotation 0° / 180° / 90° CW / 90° CCW
│ ├── Device Info Heap, CPU, flash, board name
│ ├── Set PIN 4-digit boot lock
│ └── CC1101 Module Standard HW-863 ↔ E07 PA module
│
└── About
└── Firmware info + armed module list
All WiFi attacks use the ESP32's built-in radio — no external hardware. APSTA mode: STA scans, AP injects raw frames. Max TX at +20.5 dBm.
- Deauther — Scan, tap a target, flood deauth frames. WiFi Scanner has tap-to-deauth built in.
- Probe Sniffer → Evil Twin — Capture what devices are looking for, then become that network. Auto-spawns GARMR captive portal with the probed SSID.
- Auth Flood — Random MAC auth frame flood. Exhausts AP client tables. 85-bar equalizer shows attack rhythm.
- Captive Portal (GARMR) — Fake AP + DNS hijack + credential harvest page. Works standalone or chained from Probe Sniffer / WiFi Scanner.
All BLE uses the ESP32's built-in Bluetooth. Proper WiFi↔BLE radio teardown handled automatically.
- BLE Predator — Three phases: SCAN (discover + threat classify), RECON (GATT enumerate all services/chars), HONEYPOT (clone as connectable server, capture credentials on WRITE). Loot saved to SD.
- Airoha RACE — CVE-2025-20700/20701/20702. Unauthenticated BLE GATT access to Airoha chipsets (Sony XM4/XM5/XM6, Marshall, JBL, Jabra, etc). Extracts Bluetooth link keys, BD_ADDR, firmware version, flash memory. No pairing required.
- WhisperPair — CVE-2025-36911. Probes Google Fast Pair devices for unauthorized pairing vulnerability.
- Lunatic Fringe — Hub for tracker detection and attacks. Scans for AirTags, Samsung SmartTags, Tile, Chipolo, Google FMDN. Phantom Flood spams fake FindMy trackers. AirTag Replay clones real AirTag identities.
External NRF24L01+PA+LNA required. All modes at RF24_PA_MAX (+20 dBm with PA module).
- NRF Sniffer — Travis Goodspeed promiscuous mode. Captures raw packets from wireless keyboards, mice, drones. Tap a captured address → auto-populates MouseJack.
- MouseJack — Keystroke injection into Logitech Unifying, Dell, Microsoft wireless keyboards. HID++ packets, pre-built payloads (reverse shell, WiFi exfil, custom string).
- WLAN Jammer / Proto Kill — Broadband 2.4GHz disruption. Affects WiFi, BLE, Zigbee, wireless peripherals, drones.
External CC1101 required. All TX at setPA(12) max power. Optional E07-433M20S PA module for 20dBm amplified output.
- Replay Attack — Record and replay SubGHz signals. RSSI gating, drain loop, repeat validation. Save profiles to SD.
- Brute Force — Automated code generation with de Bruijn sequences. Princeton, CAME, Nice FLO, PT2262.
- Tesla Charge — Opens the charge port on any Tesla. Static 43-byte OOK payload, zero authentication, zero rolling code. Works on every Tesla ever made. US (315 MHz), EU (433.92 MHz), or both.
- .Sub Read — Browse and transmit Flipper Zero .sub files from SD card. Supports RAW, Princeton, CAME, Nice FLO across full CC1101 frequency range. No .sub files required — shows empty state if folder is missing. Drop files in
/subghz/when you have them.
External PN532 V3 in SPI mode. Scan, read, clone, brute force, and emulate MIFARE Classic cards.
Defensive modules. WiFi Guardian catches deauth floods, SubGHz Sentinel detects carrier jamming, 2.4GHz Watchdog spots broadband disruption, Full Spectrum monitors all bands at once.
- EAPOL Capture — WPA 4-way handshake + PMKID extraction. Deauth to force reauth, capture, save in hashcat format.
- Karma Attack — Auto-respond to every probe request, chain into captive portal for credential harvest.
- IoT Recon — Connect to WiFi, scan the subnet, fingerprint services (HTTP, RTSP, Telnet, MQTT, Modbus, XMEye), brute force default credentials. Dual-core: networking on Core 0, UI on Core 1. Drop custom creds in
/creds.txton SD. - Flock You — Passive detection of Flock Safety ALPR cameras and Raven/ShotSpotter sensors via BLE fingerprinting. 22 OUI prefixes, 8 Raven GATT service UUIDs, firmware version estimation. GPS-tagged saves to SD.
- Loot — Unified browser for all captured data: wardriving CSVs, EAPOL handshakes, WhisperPair/BLE Predator loot, IoT Recon reports, credentials.
Every offensive module is gated behind a liability disclaimer. Accept to unlock offensive tools, decline to enter Blue Team mode — defensive and passive modules only. Blue Team mode persists across reboots. The VALHALLA/BLUE TEAM banner on the home screen shows your current mode.
All external radios share the VSPI bus (GPIO 18/19/23) with the built-in SD card. Only one device talks at a time — the SPI manager handles bus arbitration automatically. The Radio Test module (Tools > Radio Test) also has 4-page visual wiring diagrams built into the firmware.
Note: CiferTech's original firmware had CC1101 TX/RX pins swapped. HaleHound corrects this — GDO0 is TX (to radio), GDO2 is RX (from radio).
┌─────────────────┐ ┌──────────────────┐
│ CC1101 │ │ CYD ESP32 │
│ HW-863 │ │ │
├─────────────────┤ ├──────────────────┤
│ VCC ─────────────┼──────────────┤ 3.3V │
│ GND ─────────────┼──────────────┤ GND │
│ SCK ─────────────┼──────────────┤ GPIO 18 (VSPI) │
│ MOSI ────────────┼──────────────┤ GPIO 23 (VSPI) │
│ MISO ────────────┼──────────────┤ GPIO 19 (VSPI) │
│ CS ──────────────┼──────────────┤ GPIO 27 (CN1 hdr) │
│ GDO0 (TX) ───────┼──────────────┤ GPIO 22 (P3 hdr) │
│ GDO2 (RX) ───────┼──────────────┤ GPIO 35 (P3 hdr) │
└─────────────────┘ └──────────────────┘
E32R28T / E32R35T: CC1101 CS moves to GPIO 21 (GPIO 27 is backlight on 3.5"). All other pins identical.
┌─────────────────┐ ┌──────────────────┐
│ NRF24L01 │ │ CYD ESP32 │
│ +PA+LNA │ │ │
├─────────────────┤ ├──────────────────┤
│ VCC ─────────────┼──────────────┤ 3.3V │
│ GND ─────────────┼──────────────┤ GND │
│ SCK ─────────────┼──────────────┤ GPIO 18 (VSPI) │
│ MOSI ────────────┼──────────────┤ GPIO 23 (VSPI) │
│ MISO ────────────┼──────────────┤ GPIO 19 (VSPI) │
│ CSN ─────────────┼──────────────┤ GPIO 4 (was RGB R)│
│ CE ──────────────┼──────────────┤ GPIO 16 (was RGB G)│
│ IRQ (optional) ──┼──────────────┤ GPIO 17 (was RGB B)│
└─────────────────┘ └──────────────────┘
E32R28T / E32R35T: NRF24 CSN moves to GPIO 26 (GPIO 4 used for CC1101 PA TX_EN). CE and IRQ stay the same.
10uF capacitor between VCC/GND at the NRF24 module if you get random resets.
┌─────────────────┐ ┌──────────────────┐
│ PN532 V3 │ │ CYD ESP32 │
│ (Elechouse) │ │ │
├─────────────────┤ ├──────────────────┤
│ VCC ─────────────┼──────────────┤ 3.3V (CN1 hdr) │
│ GND ─────────────┼──────────────┤ GND (CN1 hdr) │
│ SCK ─────────────┼──────────────┤ GPIO 18 (VSPI) │
│ MOSI ────────────┼──────────────┤ GPIO 23 (VSPI) │
│ MISO ────────────┼──────────────┤ GPIO 19 (VSPI) │
│ SS ──────────────┼──────────────┤ GPIO 17 (was RGB B)│
└─────────────────┘ └──────────────────┘
DIP Switches: CH1=OFF, CH2=ON for SPI mode.
┌─────────────────┐ ┌──────────────────┐
│ GT-U7 │ │ CYD P1 Connector │
│ GPS │ │ (JST header) │
├─────────────────┤ ├──────────────────┤
│ VCC ─────────────┼──────────────┤ VIN │
│ GND ─────────────┼──────────────┤ GND │
│ TX ──────────────┼──────────────┤ RX (GPIO 3) │
│ RX (not used) ───┼──────────────┤ TX (GPIO 1) │
└─────────────────┘ └──────────────────┘
USB Conflict: GPIO 3 is shared with USB serial RX. Firmware calls Serial.end() during GPS, restores on exit.
┌─────────────────┐ ┌──────────────────┐
│ E07-433M20S │ │ E32R28T/E32R35T │
│ (CC1101 + PA) │ │ ESP32 │
├─────────────────┤ ├──────────────────┤
│ VCC ─────────────┼── 3.3V BUCK ─┤ (NOT CYD 3.3V!) │
│ GND ─────────────┼──────────────┤ GND (common) │
│ SCK ─────────────┼──────────────┤ GPIO 18 (VSPI) │
│ MOSI ────────────┼──────────────┤ GPIO 23 (VSPI) │
│ MISO ────────────┼──────────────┤ GPIO 19 (VSPI) │
│ CS ──────────────┼──────────────┤ GPIO 21 │
│ GDO0 (TX) ───────┼──────────────┤ GPIO 22 │
│ GDO2 (RX) ───────┼──────────────┤ GPIO 35 │
│ TX_EN ───────────┼──────────────┤ GPIO 4 │
│ RX_EN ───────────┼──────────────┤ GPIO 0 │
└─────────────────┘ └──────────────────┘
Must be powered from an independent 5V→3.3V buck converter — not the CYD's 3.3V rail. The PA module draws too much current. Same applies to the NRF24 E01-2G4M27SX. Enable PA mode in Settings > CC1101 Module. E32R28T/E32R35T only.
FAT32 formatted MicroSD. Nothing is required — every module handles missing folders gracefully.
/sd/
├── subghz/ .sub files for Sub Read (organize into subfolders)
├── eapol/ EAPOL/PMKID captures
├── wardriving/ GPS-tagged AP logs
├── wp_loot/ WhisperPair + BLE Predator loot
├── loot/ Flock You detection logs
├── creds.txt Custom credentials for IoT Recon (optional)
├── iot_recon.txt IoT Recon attack reports
└── firmware/ OTA update .bin files
Pre-built firmware is in the flash_package/ folder. One binary per board.
Flash HaleHound-<board>-FULL.bin at address 0x0.
- Open esp.huhn.me in Chrome/Edge/Opera
- Connect → select your CYD serial port
- Set address
0x0, select the FULL.bin for your board - Program → power cycle
esptool.py --chip esp32 --baud 115200 write_flash 0x0 HaleHound-CYD-FULL.binIf single-file gives a black screen:
| Address | File |
|---|---|
0x1000 |
bootloader.bin |
0x8000 |
partitions.bin |
0xe000 |
boot_app0.bin |
0x10000 |
HaleHound-<board>.bin |
Touch calibration runs automatically on first boot. Tap the 4 corner crosshairs. If display orientation is wrong, fix it in Settings > Rotation — no reflash needed.
CYD boards use CH340 USB serial. Install if your computer doesn't see the board:
- Windows: CH341SER.EXE
- macOS: CH341SER_MAC.ZIP
- Linux: Built into kernel 5.x+
# Install PlatformIO, plug in CYD, then:
pio run -e esp32-cyd --target upload # 2.8" CYD
pio run -e esp32-e32r35t --target upload # E32R35T 3.5"
pio run -e esp32-e32r28t --target upload # E32R28T
pio run -e esp32-cyd-hat --target upload # NM-RF-Hat
# Serial monitor
pio device monitor -b 115200Requires Python 3.10-3.13 (3.14 needs a platform.py patch).
Every attack radio runs at max.
| Radio | Power |
|---|---|
| WiFi (ESP32) | +20.5 dBm |
| NRF24+PA+LNA | +20 dBm |
| CC1101 | +12 dBm (stock) / +20 dBm (E07 PA) |
| BLE (ESP32) | +9 dBm |
| Issue | Fix |
|---|---|
| NRF24 random resets | Solder 10uF cap across VCC/GND at module |
| GPS shares GPIO 3 with USB serial | Firmware handles this — Serial.end() during GPS |
| Display upside-down after flash | Settings > Rotation |
| Touch offset after flash | Auto-calibrates first boot, or Tools > Touch Calibrate |
| Python 3.14 breaks PlatformIO | Use 3.10-3.13 or patch platform.py |
HaleHound-CYD by JesseCHale
This project exists because of the people who use it, break it, and tell me what to build next.
Duggie (@duggie162-cpu)
- Radio Test upgrade source code (NRF24 spectrum scan, CC1101 signal detection, GPS test)
- RFID module recommendation
@CircuitZ — IoT Recon idea
@ValleytechSolutions — Jam Detect concept
@duggie162-cpu, @ValleytechSolutions, @TalkingSasquach, @Notorious-Squirrel, @Man-In-The-Mayhem, @hamspiced — The efforts and ideas that created the OPSEC of the HaleHound
GitHub: github.com/JesseCHale/HaleHound-CYD
I built this.
