This module is built around NXP PN532, and the maker break out almost all of the I/O pins of the NXP532 chip on this little module. This Arduino-compatible module has the following features: Supports ...

Shown below is the basic hardware setup diagram. Here, Arduino’s (Uno R3) A4 (SDA) and A5 (SCK/SCL) pins are used for the I2C control, and the module is 3.3 V powered by the Arduino itself. It seems ...

All stamp modules are cascade-able thanks to the I2C bus line. This allows you to connect multiple stamp functionalities using the same 2 pins, leaving the other pins free for multi-functional and ...

The GPS module itself can be set to update at anywhere from 1 to 10 Hz, and [Wayne] says that the I 2 C bus blows away the oft-used 9600 baud serial interface.

[Johngineer] found himself in need of an I2C sniffer, but didn’t have one available. Necessity is the mother of invention, so he put together this I2C sniffer sketch for Arduino. The arduino … ...

This module utilizes an Adafruit Bicolor LED Square Pixel Matrix with I2C Backpack and an Adafruit Microphone. It introduces how to download libraries for the LED Backpack and how to use it to display ...