Ive listed them below in the order that youre likely to use them. There are nine functions created by the Wire library, that you use to make I2C magic happen with your Arduino.Īrduino Wire.h Library Download These are made available in your code by using the command include Wire.h at the top of your sketch. That in turn, calls which imports a WHOLE bunch of the more hardcore libraries from various sources, such as Atmel, the chip manufacturer. When youre writing Wire.begin(), that command is defined in Wire.h Wire.cpp. Utility twi.c Now its not a perfect analogy, but you can think of these files as creating a machine, where are the parts that let you write the easy-to-understand Arduino code, and are the parts that take your easy-to-understand code and reconfigure it to something the C compiler wants to chew on. There are several files in that path, including the example code that is available to you in the IDE, but the heart of I2C communications with an Arduino resides in four files. The library and files all contain the word wire because Atmel (the chip at the heart of the Arduino) devised a system called Two Wire Interface or TWI which is their flavor of I2C.

The Arduino Wire Library The Wire Library is a series of files in plain text that exist in the.ArduinolibrariesWire directory on the machine you write your code on. Setup No setup is required, however you can access the files that comprise the wire library in the program folders installed with your Arduino IDE.īe very careful when opening those files though, that you dont modify them or youll need to reinstall everything from scratch.Īdditionally, if you wish to replicate the oscilloscope traces, use any two channel oscilloscope capable of reading a 100kHz signal connected to the SDA and SCL lines between an Arduino and any I2C chip, and then send each function listed below as necessary with sufficient delay time in between to allow you to view the resulting scope trace.

Where is arduino wire library