SGP CARD joker
SGP CARD joker
SGP CARD JOKER
Your complete wireless prototyping lab, right in your wallet. Scan. Analyze. Prototype. A credit-card-sized development lab — driven entirely from your phone over the card's own Wi-Fi panel. No app, no cloud, no internet required.
🃏 Core Capabilities
ESP32-S3 Core
Dual-core Xtensa LX7 @ 240 MHz with 8 MB flash and native USB. A complete wireless computer on a card — 100% open and reprogrammable.
13.56 MHz NFC / RFID
Onboard PN532 front-end to read, write and explore 13.56 MHz ISO-14443A / MIFARE tags — ideal for NFC development, tag experiments and DIY projects.
Wi-Fi Signal Lab
Survey nearby 2.4 GHz networks and analyze channels, devices and signal quality to understand your own wireless environment in detail.
Bluetooth LE Scanner
Discover, identify and log nearby Bluetooth 5 (LE) devices with live RSSI and vendor lookup — a clear map of the BLE activity around you.
Proximity Radar
A combined Wi-Fi + BLE "sonar" that detects nearby wireless devices in real time on a live sweep display — instant awareness of the signals around you.
Signal Strength (CSI)
Read the live link intensity between the card and your phone for presence and motion experiments — turn ordinary Wi-Fi into a sensing tool.
Addressable RGB
Four chainable WS2812B LEDs with dozens of effects — status auras, siren, amber, Morse / SOS and a hold-to-read battery gauge across all four lights.
Sound Engine
An onboard buzzer with a full tone library — alerts, locators and long chiptune soundtracks — for feedback, signalling and just plain fun.
USB-C OTG
Native USB-C for keyboard / mouse (HID) prototyping and automation on computers you own, plus fast one-cable firmware flashing from the browser.
GPIO Expansion Header
14 programmable pins (GPIO / I²C / UART / 3V3 / GND) to dock sensors, actuators and external modules and drive them live from the panel.
Phone-Controlled Panel
The card raises its own Wi-Fi access point and serves a green web console. Every module is a tap away in any browser — nothing to install.
100% Open Source
Arduino / ESP-IDF compatible with a fully documented pin map. Fork the firmware, add your own modules and make the card truly yours.
⚡ Applications & Use Cases
💳 01. NFC / RFID Projects
Read, write and compare NFC / RFID tags and learn how contactless technology works, using tags that belong to you.
📡 02. Wireless Analysis
Survey and analyze your own or your organization's Wi-Fi / BLE environment to understand coverage, channels and connected devices.
🔎 03. BLE Discovery
Discover the Bluetooth devices around you, identify vendors and study advertising and signal behaviour.
⌨️ 04. USB Automation
Prototype keyboard and mouse macros to automate repetitive tasks on computers you own.
🎓 05. Embedded Education
A pocket laboratory for learning C / C++, wireless protocols and secure hardware — Arduino and ESP-IDF ready.
⚙️ 06. Hardware Prototyping
Drive the GPIO header to breadboard sensors, actuators and I²C / UART peripherals on the fly.
🔧 Technical Specifications
- Processor ESP32-S3, dual-core LX7 @ 240 MHz
- Memory 8 MB flash, native USB
- NFC / RFID PN532 · 13.56 MHz · ISO-14443A
- Wireless 2.4 GHz Wi-Fi + Bluetooth 5 (LE)
- Lighting 4 × WS2812B addressable RGB
- Audio Piezo buzzer, tone engine
- Connectivity USB-C (OTG) + 14-pin header
- Header GPIO / I²C / UART / 3V3 / GND
- Control Self-hosted Wi-Fi AP + web panel
- Firmware Open source · Arduino-compatible
✅ Why the Card Joker
- ✓ No app & no cloud — runs from its own Wi-Fi
- ✓ Works with any phone, tablet or laptop browser
- ✓ Credit-card format — genuinely pocketable
- ✓ Every module in one green console
- ✓ Flash new firmware over a single USB-C cable
- ✓ Fully documented, open and expandable
🔒 Responsible Use
Engineered for education, electronics development and personal IoT projects. Operators must comply with all applicable laws and only use the device on networks and hardware they own or have explicit permission to use.