While the I☬ format stays the same physically, the versatility of this bus means that there are quite a few variations on how to implement it on the software side. You may also choose a different line to comment or uncomment depending on what type of encoder you use. Once all the connections are in place, load the appropriate example code and a pair of corresponding libraries that must reside in the same directory as the sketch.ĭepending on your device, you may need to change the address, which ranges from 0 to 127 in hexadecimal – expressed as 0x00 to 0x7F. This wire isn’t going to an Arduino interrupt pin instead, it prompts the Arduino master to receive from the encoder slave module.ģ. This pinout stays consistent between most modules, but you’ll need to connect a fifth wire, labeled as “INT” for interrupt, to A2. First, we soldered the encoder along with the five lines that would go to the Arduino Uno, all of which we plugged into the appropriate Arduino header pins.Ģ. This interface does not include the encoder itself.ġ. We used an encoder I☬ interface that comes as a small board with the I☬ components. 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
0 kommentar(er)
