Arduino Wire.h Library Fixed Jun 2026

Let's use an LED driver like the PCA9685 as an example. The PCA9685 uses the I2C protocol to control the LEDs.

#include <Wire.h>

The Wire library is included in the Arduino IDE by default, so you don't need to install any additional libraries. To use the Wire library, simply include it at the top of your sketch: arduino wire.h library

// Request 5 bytes (3 pressure, 2 temp) Wire.requestFrom(SENSOR_ADDR, 5); Let's use an LED driver like the PCA9685 as an example

It sets specific bits in the to determine the speed. It configures the prescaler . It enables the "Two-Wire Interface" hardware inside the chip. 2 temp) Wire.requestFrom(SENSOR_ADDR

const int BMP180_ADDRESS = 0x77; // BMP180 I2C address