What is I2C communication in Arduino?

What is I2C communication in Arduino?

I2C, or Inter-Integrated Circuit, is a communication protocol used to connect multiple devices using only two wires: SDA (data line) and SCL (clock line). It's commonly used in Arduino projects to communicate with sensors and other peripherals.

How do I set up I2C on my Arduino?

To set up I2C on your Arduino, you need to include the Wire library in your sketch. Then, initialize the I2C communication using Wire.begin(). You can start sending and receiving data using Wire.beginTransmission() and Wire.endTransmission().

Can you give me an example code for I2C?

Sure! Here's a simple example:

#include <Wire.h>

void setup() {
  Wire.begin(); // Join I2C bus as a master
  Serial.begin(9600);
}

void loop() {
  Wire.requestFrom(8, 1); // Request 1 byte from device with address 8
  while (Wire.available()) {
    char c = Wire.read(); // Receive a byte
    Serial.println(c); // Print the byte
  }
  delay(1000);
}

What devices can I connect using I2C?

You can connect various devices using I2C, such as sensors (like temperature or humidity sensors), displays (like OLED or LCD), and even other microcontrollers. Just make sure they have unique addresses!