Datasheet

The tiles have 3 address jumpers. You can tile up to 8 PCBs together (for a total of 4x32 or 16x8=128 buttons/leds) on a

single I2C bus, as long as each one has a unique address. All the tiles connect by the edges with solder, and share the

same power, ground, interrupt, and i2c clock/data pins. So, you can easily set up to 128 LEDs and read up to 128

buttons using only 2 I2C wires! The tiles can be arranged in any configuration they want as long as each tile is

connected to another with the 5 edge-fingers.

Each LED is multiplexed with a constant-current driver, so you can mix and match any colors you like. You don't need it