![]() This is the ultimate guide for Arduino I2C communication. It’s a prerequisite for this tutorial so you can smoothly proceed with the example projects we’ll implement hereafter. You need to refer to the tutorial below to help you understand the basics of Arduino I2C communication and how to use the Wire.h library functions. I’ll give you a brief use case for each form of communication to help you make a guided design decision when you’re choosing the configuration that suits the needs of your next projects in the future. ![]() Next, we’ll implement each of the 3 possible forms of I2C communication between the two Arduino boards that we’ve mentioned above. This will be the basis on which you’ll choose the most suitable form of communication between the two Arduino boards (I2C devices). ![]() Which depends on your target application and what you’re trying to achieve. Therefore, the I2C communication between the two Arduino boards can take one of the following forms: In other words, the Two Arduino boards will form a Single-Master Single-Slave I2C bus. Given that we’re only considering Two Arduino boards (I2C devices), then it’s a one-to-one communication. I2C Communication Between Two Arduino BoardsĪn I2C device (Master or Slave) can be a transmitter or a receiver and it’s up to you, the system designer & programmer, to decide whether a specific I2C device on the bus (Master or Slave) will be a data transmitter or receiver.
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