Use Serial Communications with Arduino Hardware Arduino ® hardware has serial ports, also known as UARTs, that can communicate with other devices that have serial interfaces. Hardware You can use serial port 0 to communicate with other devices that have serial ports, or to communicate with a computer over the USB port. Each serial port supports one Serial Transmit and one Serial Receive block, one block per pin.
You can run your model in the External mode for all the Arduino boards. To know pin mapping for different Arduino boards, see Pin Mapping Table in:. Add the block to your model. Connect a data source to the block input on the Serial Transmit block. If the data type is not uint8, use a Data Type Conversion block to convert it to uint8. In the Arduino Serial Transmit block, select a Port number.
Click the Tools menu in the model, and select Run on Target Hardware Options. In the Configuration Parameters dialog that opens, on the Hardware Implementation Serial port properties, set the baud rate for the serial port you selected in the Arduino Serial Transmit block. Connect the appropriate digital transmit pin to the hardware that receives the data. Run the model, as described in. If your model uses the Arduino USB port (Serial port 0) to transmit data to a device that is not your host computer, reconnect the USB cable to that device and press the RESET button.
![Reset Reset](/uploads/1/2/5/4/125481873/485717017.jpg)
Receive Serial Data To receive data through a serial port or USB port on the Arduino hardware. Add the block to your model. On the Arduino Serial Receive block, connect the Data block output to a block that uses the data. Open the Arduino Serial Receive block and specify the Port number. Click the Tools menu in the model, and select Run on Target Hardware Options. In the Configuration Parameters dialog that opens, on the Hardware Implementation Serial port properties, set the baud rate for the serial port you selected in the Arduino Serial Receive block. Connect the digital receive pin to the hardware that transmits the data.
The reason for the reset is that Arduino Uno boards use the DTR signal line as a reset input, for automatic 'rebooting' of the board for loading fresh code from the Arduino IDE. One solution suggested (for Arduino Uno boards) is to connect a 10 μF capacitor between the Reset pin and Ground. This should prevent the auto-reset.
Run the model, as described in. If your model uses the Arduino USB port (Serial port 0) to receive data from a device that is not your host computer, reconnect the USB cable to that device and press the RESET button.
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