I understand that you have an Arduino UNO connected to IMU that collects data from a gyroscope (presumably measuring X, Y, and Z axes) and the Arduino is sending this data as a data frame over a serial connection to MATLAB to read and interpret these variables.
The Arduino code you provided is writing a simple packet of data to the serial port. The first two bytes are random numbers, which can be used to synchronize the sender and receiver. The third byte is a packet sequence number, which can be used to detect lost or out-of-order packets. The fourth and fifth bytes are random numbers, which can be used to fill up the packet and make it a consistent length. The sixth to ninth bytes are the data values that you want to measure, in this case the X, Y, and Z gyroscope readings. Also, different functions used for this are:
- serialport("COM6", 9600): This line creates a serial port object named arduinoObj to establish communication with the Arduino. It specifies the COM port ("COM6") and the baud rate (9600) to match the settings on your Arduino.
- flush(arduinoObj): This line flushes any existing data in the input buffer of the serial port. It ensures that you are reading fresh data.
- read(arduinoObj, 4, "uint8"): This line reads 4 bytes from the serial port using the read function. It specifies that the data should be interpreted as unsigned 8-bit integers (uint8). This matches the data format you're sending from Arduino.
For further information, refer to the documentation links below:
