If you want to learn more about the I2C protocol and how it works, you can check the I2C standards. When this information is sent, the called upon device executes the request and transmits it's data back, if required, to the board over the same line using the clock signal still generated by the writer on SCL. The I2C protocol involves using two lines to send and receive data: a serial clock pin (SCL) where the Arduino writer board pulses at a regular interval, and a serial data pin (SDA) over which data is sent between the two devices.Īs the clock line changes from low to high, a single bit of information that will form the address of a specific device, and a command or data is transferred from the board to the I2C device over the SDA line. The only requisite is that each of those sensors have a unique address. It allows us to connect multiple readers to a single writer, meaning that, you could have more than one sensor connected to the same pins of your Arduino board through I2C. I2C (Inter Integrated Circuits) is a well known and widely used protocol. Arduino Nano Every (or any other Arduino board that supports I2C).Use I2C communication between two Arduino boards.In this example, we will power both the Arduino boards through a computer, then through the Serial Monitor, we will introduce some commands to turn ON or OFF the LED of the Nano Every board. If the connections vary, it may happen that the code might also need changes to match with the I2C pins of the different boards. Note: This example would work connecting an Arduino Nano Every board with any other Arduino board, but be mindful that by using any other board the connections might differ. To do so, we will connect both boards using a wired communication protocol called I2C. In this tutorial we will control the built-in LED of an Arduino Nano Every from another Arduino Nano Every.
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