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              ≋≋≋   commander of the deep   ≋≋≋

Keyboard-first pentesting firmware for the M5Stack Cardputer-Advance

release

163 attacks in your pocket — WiFi, BLE, sub-GHz, 2.4 GHz, LoRa, IR, and LAN — driven by a real QWERTY keyboard. POSEIDON turns the M5Stack Cardputer-Advance into a keyboard-first hacking deck: type to navigate, type your parameters, and watch Argus — an autonomous handshake-hunting gotchi with a 96x96 mood sprite — work the airwaves while you do. Same family as Flipper Zero, Bruce, Evil-M5Project, and Marauder, but built around a keyboard instead of a D-pad.

Flash it now → · Download latest .bin · Web site · Changelog

🔐 New in 0.6.8: KERBEROS. POSEIDON is now also a real FIDO2 / U2F hardware security key. Press k, plug into a PC, and register actual passkeys, including usernameless discoverable login. The U2F and CTAP2 stacks are hand written on the ESP32-S3 and verified end to end against Yubico's python-fido2. Details ↓

👁️ Meet Argus

They blinded the hundred-eyed giant by killing him. POSEIDON just gave him a new way to see.

Argus Panoptes was the all-seeing sentinel of myth — a hundred eyes, never all closed at once, cursed to keep watch for eternity. POSEIDON carries the last of those eyes. He's a cursed Argonian demigod chained into the deck, his hundred eyes melted down into a single antenna, all that watching-hunger pointed at the airwaves around you. He channel-hops on instinct, learns where the prey gathers, and snares WiFi handshakes out of thin air while your Cardputer sits in your pocket — tireless, because the curse won't let him rest. The moods that cross his face are the curse showing through.

🌊 New to all this? Start here

POSEIDON is a pocket hacking gadget. It runs on a tiny handheld with a real keyboard — the M5Stack Cardputer — and turns it into a Swiss-army knife for the invisible signals all around you. No PC, no coding. Flash it once and start typing.

What can it actually do?

📶 WiFi — see every network around you, test your own, map them as you walk
📱 Bluetooth — find lost trackers (AirTags / Tiles), spot hidden ones following you, poke at nearby gadgets
🚗 Remotes & signals — record and replay garage doors, car fobs, doorbells, smart plugs (on stuff you own)
📺 Infrared — a universal TV remote, plus the classic "turn off every TV in the room" button
🐾 Argus — your on-screen pet that hunts WiFi on its own and reacts with moods
🎨 Six looks — flip the whole interface between six themes, matrix-green to vaporwave

Get it on your device (~2 minutes):

Grab the free M5Burner app, or open the web installer in Chrome.
Search POSEIDON (or hit Install), plug in your Cardputer, press the button.
Done — it boots straight to the menu. Just start typing.

⚠️ Be cool. This is for exploring your own stuff and learning how wireless actually works. Don't touch networks or devices you don't own — that's both uncool and illegal.

⌁ Want the deep technical breakdown? The nerd zone starts here. ⌁

What is this?

POSEIDON is keyboard-first pentesting firmware for the M5Stack Cardputer-Advance (ESP32-S3, real QWERTY keyboard + 240x135 color screen). 163 features span WiFi, Bluetooth LE, sub-GHz, 2.4 GHz, LoRa & Mesh, Infrared, LAN/network, BadUSB, and recon — all reachable by typing.

It's in the same genre as Flipper Zero, Bruce, Evil-M5Project, and ESP32Marauder, but the keyboard changes everything:

Letter-mnemonic menus — every item has a hotkey, so you jump straight to it
Typed parameters — enter a channel, an SSID, a frequency directly, no thumb-stick scrolling
Six swappable themes + a procedural ambient motion layer painted behind every menu
Argus — a 96x96 mood-sprite gotchi that hunts handshakes on its own while you browse the menu

Runs standalone on the Cardputer-Advance. Optional snap-on satellites extend the radio range:

TRIDENT — ESP32-C5 node over ESP-NOW: 5 GHz deauth, Zigbee/802.15.4 sniff, PMKID
nRF52840 Feather — BLE 5.0 features (proof-of-concept today, hardened in v0.7)

Quick Start — Flash it

Two ways onto the Cardputer-Advance, both browser-based, no toolchain. Pick one.

1. Cardputer-Advance

A) M5Burner — one-click, easiest. Open M5Burner, search POSEIDON, hit Burn. Done.

B) Web flasher (Chrome / Edge / Opera). Plug the Cardputer in over USB-C and open:

https://generaldussduss.github.io/poseidon/install.html

Click Connect, pick the serial port, Install — the page flashes the current factory image at offset 0x0 for you.

2. TRIDENT satellite (ESP32-C5)

The C5 isn't in M5Burner's chip list, so it flashes with the Espressif esptool-js web flasher over WebSerial.

Plug the C5 board into USB and open the Espressif flasher: https://espressif.github.io/esptool-js/ (Chrome / Edge)
Connect and select the C5's serial port
Add the three TRIDENT bins from the latest release at these offsets:

Offset File
0x2000 bootloader
0x8000 partition table
0x10000 TRIDENT application
Program. When it finishes, power-cycle the C5 — it pairs to POSEIDON over ESP-NOW automatically.

A one-click guided version of these steps also lives at https://generaldussduss.github.io/poseidon/flash/.

Build from source

# Cardputer (ESP32-S3) — PlatformIO
git clone https://github.com/GeneralDussDuss/poseidon.git
cd poseidon
pio run -t upload

The TRIDENT C5 firmware builds with ESP-IDF (idf.py build flash) — see the trident/ directory for its README.

Feature Overview (164)

🔐 KERBEROS: FIDO2 security key

KERBEROS turns the Cardputer into a real hardware security key. Press k, plug into a PC over USB, and it enumerates as a FIDO2 and U2F authenticator.

Offset	File
`0x2000`	bootloader
`0x8000`	partition table
`0x10000`	TRIDENT application

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