Software Serial Arduino

Hello!

In the previous post I have spoken about the JY MCU Bluetooth Module, wiring using the Serial Port of our Arduino and a basic example but, how about if you want to use the Serial Port to another thing and you want to continue using the JY MCU? Can we emulate a Serial Port with digital I/O of our Arduino?. Of course, Yes!.

It's very easy. We only need to connect our JY MCU Bt following this schematic:

TX BT Module ------------------> Digital Pin 10 Arduino

RX BT Module ------------------> Digital Pin 11 Arduino

VCC BT Module <---------------> 3,3V Pin Arduino

GND BT Module <---------------> GND Pin Arduino

Note: Of course, you can choose the Digital I/O which you prefer. Then, in the code source, we configure them.

 Code:


#include <SoftwareSerial.h>

SoftwareSerial mySerial(10, 11); // RX, TX
char lecturaSerie = Serial.read();
int led = 13;

void setup()  
{
   Serial.begin(9600); // Open serial communications and wait for port to open:
  
  mySerial.begin(9600); // set the data rate for the SoftwareSerial port
}

void loop() // run over and over
{
  if (mySerial.available())

   {
     if (mySerial.read() == '1')
      digitalWrite(led, HIGH);   // set the LED on
      Serial.println("LED ON");        
   }
   {
     if (mySerial.read() == '2')
      digitalWrite(led, LOW);   // set the LED on
      Serial.println("LED OFF");      
   }
  delay(100);                    // wait 100ms for next reading
}



In this code source, We use the library SoftwareSerial.h to emulate a Serial Port in the digital ports 10 and 11... and then, if Arduino receives de conditions "1" or "2", it switchs on or switchs off a Led and sends a message through the original Serial Port.


See you!!