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/*
Software serial multple serial test
Receives from the two software serial ports,
sends to the hardware serial port.
In order to listen on a software port, you call port.listen().
When using two software serial ports, you have to switch ports
by listen()ing on each one in turn. Pick a logical time to switch
ports, like the end of an expected transmission, or when the
buffer is empty. This example switches ports when there is nothing
more to read from a port
The circuit:
Two devices which communicate serially are needed.
* First serial device's TX attached to digital pin A0, RX to pin A1
* Second serial device's TX attached to digital pin A2, RX to pin A3
This example code is in the public domain.
*/
#include <SoftwareSerial.h>
// software serial #1: TX = digital pin A1, RX = digital pin A0
SoftwareSerial portOne(A0, A1);
// software serial #2: TX = digital pin A3, RX = digital pin A2
SoftwareSerial portTwo(A2, A3);
void setup()
{
// Open serial communications and wait for port to open:
Serial.begin(115200);
while ( !Serial ) delay(10); // for nrf52840 with native usb
// Start each software serial port
portOne.begin(9600);
portTwo.begin(9600);
}
void loop()
{
// By default, the last intialized port is listening.
// when you want to listen on a port, explicitly select it:
portOne.listen();
Serial.println("Data from port one:");
// while there is data coming in, read it
// and send to the hardware serial port:
while (portOne.available() > 0) {
char inByte = portOne.read();
Serial.write(inByte);
}
// blank line to separate data from the two ports:
Serial.println("");
// Now listen on the second port
portTwo.listen();
// while there is data coming in, read it
// and send to the hardware serial port:
Serial.println("Data from port two:");
while (portTwo.available() > 0) {
char inByte = portTwo.read();
Serial.write(inByte);
}
// blank line to separate data from the two ports:
Serial.println();
}
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