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/*
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  Software serial multple serial test
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 Receives from the two software serial ports, 
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 sends to the hardware serial port. 
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 In order to listen on a software port, you call port.listen(). 
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 When using two software serial ports, you have to switch ports
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 by listen()ing on each one in turn. Pick a logical time to switch
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 ports, like the end of an expected transmission, or when the 
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 buffer is empty. This example switches ports when there is nothing
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 more to read from a port
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 The circuit: 
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 Two devices which communicate serially are needed.
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 * First serial device's TX attached to digital pin 2, RX to pin 3
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 * Second serial device's TX attached to digital pin 4, RX to pin 5
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 created 18 Apr. 2011
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 by Tom Igoe
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 based on Mikal Hart's twoPortRXExample
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 This example code is in the public domain.
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 */
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#include <SoftwareSerial.h>
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// software serial #1: TX = digital pin 2, RX = digital pin 3
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SoftwareSerial portOne(2, 3);
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// software serial #2: TX = digital pin 4, RX = digital pin 5
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SoftwareSerial portTwo(4, 5);
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void setup()
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{
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  // Start the hardware serial port
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  Serial.begin(9600);
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  // Start each software serial port
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  portOne.begin(9600);
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  portTwo.begin(9600);
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}
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void loop()
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{
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  // By default, the last intialized port is listening.
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  // when you want to listen on a port, explicitly select it:
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  portOne.listen();
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  Serial.println("Data from port one:");
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  // while there is data coming in, read it
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  // and send to the hardware serial port:
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  while (portOne.available() > 0) {
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    char inByte = portOne.read();
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    Serial.write(inByte);
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  }
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  // blank line to separate data from the two ports:
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  Serial.println();
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  // Now listen on the second port
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  portTwo.listen();
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  // while there is data coming in, read it
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  // and send to the hardware serial port:
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  Serial.println("Data from port two:");
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  while (portTwo.available() > 0) {
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    char inByte = portTwo.read();
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    Serial.write(inByte);
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  }
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  // blank line to separate data from the two ports:
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  Serial.println();
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}
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