Arduino two wire library9/24/2023 ![]() ![]() I☬ technology can simplify and enhance many of your applications we’ll demonstrate how to set up an I☬ encoder as well as a small OLED display. If you’re unsure about your device’s address, and especially if you’re only going to use one I☬ device in your project, use a program called Arduino I2C Scanner to see each connected device’s address. I☬ modules include a default value for their address, but to set them up you’ll need to use jumpers or connect certain solder pads. ![]() Take note: you only need one resistor for each line, even if you’ve chained together multiple modules. Some boards even include built-in accommodations for these resistors. We use a 4.7kohm value for this setup, which is standard, but not essential. You’ll also need to attach SDA and SCL to a positive voltage through a pull-up resistor. Interrupt: Depends on the module and programming.Vcc: +5V, or potentially +3.3V depending on the module.Find more information on Arduino’s Wire library documentation, a piece of code that’s usually involved with I☬ technology. For this tutorial, we’ll assume you’re using an Arduino Uno, though you can use any Arduino or even a different computing system. Let’s start first with the basics of what you’ll need to get an I☬ module running. I2C Wiring: Setting Up the Physical Wiring ![]()
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