The HardWire lib instantiates a Wire object, so that if in the code were previously used the Wire, no changes are required, except for the header, which shall be "HardWire.h" instead of "Wire.h". NACK received in slave mode after byte is sentĪs a result, the user can take action at each step, in real time, of the I2C bus cycle where an example is depicted here below:.ACK received in slave mode after every byte sent.The user can take a custom action in the following I2C states: With the conventional Wire library, you can take action only after the STOP or when addressed as a Slave Transmit. This gives more controlĪt the lower layer of the I2C protocol, without affecting the simplicity of the original library. This is an I2C Arduino library, equivalent to the Arduino Wire lib, but with more functionality. Licensing information is attached on the header of each file.
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