Code samples in the reference are released into the public domain. The text of the Arduino reference is licensed under aĬreative Commons Attribution-ShareAlike 3.0 License. shift the value one bit to the right), yielding an address between 0 and 127.Ĭorrections, suggestions, and new documentation should be posted to the Forum.
If you have a datasheet or sample code that uses 8 bit address, you'll want to drop the low bit (i.e. The Wire library uses 7 bit addresses throughout. 7 bits identify the device, and the eighth bit determines if it's being written to or read from. There are both 7- and 8-bit versions of I2C addresses. Because of this, send() and receive() have been replaced with read() and write(). On the Arduino Mega, SDA is digital pin 20 and SCL is 21.Īs of Arduino 1.0, the library inherits from the Stream functions, making it consistent with other read/write libraries. On most Arduino boards, SDA (data line) is on analog input pin 4, and SCL (clock line) is on analog input pin 5. This library can only be used on some specific pins of the board, those pins are called SCL and SDA, on the Arduino Nano family boards, the SDA (data line) and SCL. This library allows you to communicate with I2C / TWI devices. The Wire Library To simplify the use of the I2C protocol, Arduino uses the 'Wire' library, which allows you to implement and use this protocol throughout different Arduino boards. The variant file is in variants/feathernrf52832/variant.h The nRF52 MCU can use any pair of pins for I2C. The location of the folder on Windows is in users home directory in C:\Users\\AppData\Local\Arduino15\packages. Reference Language | Libraries | Comparison | Changes 4 Answers Sorted by: 0 The hardware packages are istalled into the Arduino15 folder.
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