Card-Crack: Cardputer ESP32-S3 home-lab recon toolkit

Manual-trigger firmware toolkit for pentesting owned devices:
- Pin Scan: UART/JTAG/SWD detection (baud est + IDCODE reads)
- V-Sense: target voltage probe w/ logic-family guess
- UART Sniff: passive capture + manual-only frame replay
- USB Enum: ESP32-S3 host, read-only descriptor fingerprinting
- DefCred: single-host factory-default login check, rate-limited

Modular shell (core/ + modules/), PlatformIO build, hardware/safety docs.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01AAhMHMRAQLQ9hSbBECKNfn

platformio.ini

@@ -0,0 +1,23 @@
+; Card-Crack — Cardputer (ESP32-S3) pentest recon toolkit
+; Home-lab / authorized use only.
+[platformio]
+default_envs = cardputer
+src_dir = src
+
+[env:cardputer]
+platform = espressif32@6.9.0
+board = m5stack-stamps3
+framework = arduino
+board_build.flash_mode = qio
+board_build.f_flash = 80000000L
+board_build.partitions = default_16MB.csv
+monitor_speed = 115200
+upload_speed = 1500000
+build_flags =
+    -D CORE_DEBUG_LEVEL=1
+    -D ARDUINO_USB_MODE=1
+    -D ARDUINO_USB_CDC_ON_BOOT=1
+    -D CARDCRACK_VERSION=\"0.1.0\"
+lib_deps =
+    m5stack/M5Cardputer@^1.0.3
+    m5stack/M5GFX@^0.2.3