Serial Communication Arduino-Matlab

I want to send values from matlab to arduino, i found in some sites that i should use Serial.available and Serial.read and it works, but unfortunaly, it doesn't work, what's should i do? please help me, i need a solution and thanks.

Answer 1

[Sanskar]

Hi Rouis

If you are experiencing issues with sending values from MATLAB to Arduino using the Serial.available() and Serial.read() functions, there might be a few potential reasons. Here are some troubleshooting steps you can follow to identify and resolve the problem:

1. Verify Serial Communication Settings:

• Ensure that the baud rate setting in your MATLAB code matches the baud rate configured in your Arduino sketch. Both the MATLAB code and Arduino sketch should use the same baud rate for successful communication.
• Double-check that you have correctly opened the serial port in MATLAB using the serial function with the correct port name and baud rate.

2. Check Serial Port Connection:

• Confirm that the Arduino is properly connected to the computer via the USB cable.
• Verify that the correct serial port is selected in MATLAB using the serialportlist function or by checking the Port menu in the MATLAB command window.

3. Allow Sufficient Time for Arduino Initialization:

• Ensure that you are allowing enough time for the Arduino to initialize after opening the serial connection. You can add a delay in your MATLAB code after opening the serial port to allow the Arduino board to reset and establish the connection.

4. Debugging Arduino Code:

• Examine your Arduino code to verify that you are properly reading the incoming data using Serial.available() and Serial.read(). Make sure you are using the correct syntax and handling the received data appropriately.
• Add some debugging statements in your Arduino sketch to print the received data or other relevant information to the serial monitor. This can help you identify any issues with the data transmission.

5. Test with a Simple Example:

• Start with a simple example to test the serial communication between MATLAB and Arduino. For example, try sending a single value or a predefined message from MATLAB to Arduino, and then echo it back from Arduino to MATLAB. This can help isolate the problem and ensure that the basic communication is functioning correctly.

6. Update Drivers and Software:

• Make sure you have the latest version of MATLAB, Arduino IDE, and the necessary drivers installed. Outdated software or drivers can sometimes cause communication problems.

7. Check Hardware Connections:

• Ensure that all hardware connections between the Arduino and any external devices or sensors are correct and secure. Loose connections or incorrect wiring can disrupt the communication.

Hope it helps!