SGP Card Joker – ESP32 Wireless Multi-Tool & IoT Dev Board
SGP Card Joker – ESP32 Wireless Multi-Tool & IoT Dev Board
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- ✈️Fast air shipping
- 🛡️Replacement if it arrives faulty
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- ♾️Free software updates
SGP Card Joker
Your complete wireless prototyping lab, right in your wallet. Scan, analyze and prototype from your phone, over the card’s own Wi‑Fi panel. No app, no cloud, no internet required.
Print your own case.
Printable files for your own case — fully included. Pick any color or material and print it at home.
Core capabilities
Every module.
One console.
The card raises its own access point and serves a web panel. Every tool is one tap away in any browser.
ESP32‑S3 core240 MHz
Dual-core Xtensa LX7 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 study blank or your own 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, for a clear map of the BLE activity around you.
Proximity radar
A combined Wi‑Fi and BLE panel that shows nearby wireless activity in real time on a live sweep display.
Signal strength (CSI)
Read the live link intensity between the card and your phone for presence and motion experiments. It turns ordinary Wi‑Fi into a sensing tool.
Addressable RGB4 LEDs
Chainable WS2812B lights with dozens of effects: status auras, siren, amber, Morse / SOS and a hold-to-read battery gauge across all four.
Sound engine
An onboard buzzer with a full tone library, from alerts and locators to 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 header14 pins
Programmable 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 web console. Every module is a tap away in any browser, with nothing to install and no account to create.
100% open source
Arduino and ESP‑IDF compatible with a fully documented pin map. Fork the firmware, add your own modules and make the card truly yours.
Applications
Six ways in.
From a first NFC read to a full breadboard project.
NFC / RFID projects
Read, write and compare NFC / RFID tags and learn how contactless technology works, using tags that belong to you.
Wireless analysis
Survey and analyze your own or your organization’s Wi‑Fi / BLE environment to understand coverage, channels and connected devices.
BLE discovery
Discover the Bluetooth devices around you, identify vendors and study advertising and signal behaviour.
USB automation
Prototype keyboard and mouse macros to automate repetitive tasks on computers you own.
Embedded education
A pocket laboratory for learning C / C++, wireless protocols and secure hardware. Arduino and ESP‑IDF ready.
Hardware prototyping
Drive the GPIO header to breadboard sensors, actuators and I²C / UART peripherals on the fly.
Tech specs
On the board.
A full development board, bank-card sized.
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
Nothing to install.
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.