The CANABLOX® 16-Key 0-9, A-F Hexadecimal Keypad CX-KEYPAD-S is based on the PCF8574A I/O Expander. The module is available in the Single Slot form factor.
Selectable I2C address: 0x3B, 0x3D, 0x3E
Code example:
Download a demo sketch (tested with XIAO ESP32C6) that sends the hexadecimal number of the currently pressed key (0-F) to the serial monitor
>>> Find the documentation in the comments inside the demo code. <<<
PDF Datasheet:
Download PCF8574A PDF Datasheet
This is in the bag:
1 x CANABLOX® module
1 x male pin header 4-pin
1 x CANABLOX® I2C Cable 5cm
Note:
Through-Hole (TH) connectors, like the I2C pin header or screw terminals, are included but not factory assembled.
The CANABLOX® ecosystem
CANABLOX® is a modular, clean, stackable ecosystem that replaces the chaos of traditional prototyping with I2C-connected building blocks.
CANABLOX® is not just a hobby tool; it’s a stepping stone from prototype to finished product. With over 60 modules envisioned, from environmental sensors to serial bridges and audio applications, CANABLOX® becomes a platform, not just a product.
Every CANABLOX® module connects directly to a sturdy baseplate or standardized cables, letting you build solid, real-world systems – without the clutter.
All modules use standardized CANABLOX® slot sizes and can be connected either through 4-pin JST-SH cables (compatible with Qwiic and Stemma QT) or by direct mounting onto the baseplate with headers. Every baseplate includes I2C headers (not assembled) and mounting hardware.
Baseplate sizes:
Layout examples:
