Electronic – Can a standard Rx/Tx bluetooth module send and receive at the same time

One possible solution is to treat of the two wireless part-keyboards as separate independent keyboards i.e. Bluetooth HID keyboard devices.

• Each of the parts has only a subset of keystrokes it can send to the host.
• The two parts do not need to know about or interact with each other (if there is such a need, this solution is no longer a contender).
• That way, if a particular application needs only numeric, or only alphanumeric inputs, that keyboard alone could be used independently.
• The host Bluetooth device (tablet, PC, ...) needs to pair with both HID devices.

#include <SoftwareSerial.h>

SoftwareSerial mySerial(10, 11); // RX, TX
String Data = "";

void setup()  
{
    mySerial.begin(9600);
}

void loop() // run over and over
{
    while (mySerial.available())
    {
        char character = mySerial.read(); // Receive a single character from the software serial port
        Data.concat(character); // Add the received character to the receive buffer
        if (character == '\n')
        {
            Serial.print("Received: ");
            Serial.println(Data);

            // Add your code to parse the received line here....

            // Clear receive buffer so we're ready to receive the next line
            Data = "";
        }
    }
}