This make the communication not byte to byte controlled as I want it to be for my need. I realized that if I wanted to make an Arduino slave, when receiving from master, it actually reads from a buffer that is already previously received. Seems to be 7 bit value with bit0lower bit (not I2C RW bit), so left shifted by 1 when sent over the wire. But let’s start with the problem found in the Wire. When the limitations were somehow fixed, even though the small number of modifications (it is somehow a sort of hacking of the library) I found that the my final result were so useful to me that I thought was worth to write a short article about it. Then, when experimenting with a portability of a project in the Arduino environment, I started to trying the official Wire library, discovering some incompatibilities for my needs. available () inherits from the Stream utility class. This function should be called on a controller device after a call to requestFrom () or on a peripheral inside the onReceive () handler. code with the standard built-in Arduino libraries, such as Wire.h and SPI.h. This function returns the number of bytes available for retrieval with read (). I have spent a lot of time on playing and later working on the I2C buses. I almost always used self developed libraries, both for learning and job requirement purposes. To include a library, go to the code editor and type on an empty line.
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