Wire. Wire.write(byte(0x55)) // sends instruction byte Wire.beginTransmission(44) // transmit to device #44 (0x2c) Wire.begin() // join i2c bus (address optional for master) If I reduce the transmission to just the step #2 instruction single data byte, the same result is shown. There are Core Libraries which are platform specific and Cross-platform Libraries which are. The 2 data bytes are not being transmitted. The Wire library allows you to communicate with I2C devices, often also called 2 wire or TWI (Two Wire Interface). The following libraries are included with the Wiring software.
The only byte I can see in my oscilloscope is just the first one (please see picture below).
Wire library for arduino code#
Arduino/libraries/Wire directory on the machine you write your code on.