Issue in Reading serial data from the Arduino MEGA in Simulink using Serial Receive block

I am trying to read serial data from an Arduino Mega 2560 using Simulink.

My setup is as follows:

Arduino Code:

I am sending the sensor value over the serial ports (Serial and Serial1) every 20 ms using the following code:

    unsigned long previousTime = 0;  // Initialize previousTime outside the loop
    
    void setup() {
      Serial.begin(115200);   // Begin Serial communication (COM14)
      Serial1.begin(115200);  // Begin Serial1 communication
    }
    
    void loop() {
      int sensorValue = 20;  // Example sensor value
      unsigned long currentTime = millis();   // Get the current time in milliseconds
    
      if (currentTime - previousTime > 20) {  // Check if 20 ms have passed
        Serial.println(sensorValue);          // Print to Serial (USB connection)
        Serial1.println(sensorValue);         // Print to Serial1 (TX1/RX1 on Mega)
        previousTime = currentTime;           // Update previousTime to the current time
      }
    }

Simulink Setup:

• I am using the Serial Receive block to capture the data sent from the Arduino.
• The block is configured to read from Serial1 (Port 1).
• 
• 
• The Host-board connection and Connected I/O are both set to Serial 0 with the same baud rate (115200).
• 
• 
• The Arduino board's TX and RX LEDs are blinking, indicating communication.

Problem:

Despite this setup, the data I receive in Simulink is consistently zero instead of the expected value of 20. I have double-checked that the baud rates and serial ports are correctly configured, and the Simulink model runs without any errors.

Has anyone encountered a similar issue or can provide guidance on how to properly receive the data in Simulink?

Answer 1

[Danaish]

I have used Instrument Control Toolbox for serial communication and it worked.