#include SoftwareSerial mySerial(2, 3); // RX, TX void setup() { // Open serial communications and wait for port to open: Serial.begin(9600); while (!Serial) { ; // wait for serial port to connect. Needed for native USB port only } Serial.println("Goodnight moon!"); // set the data rate for the SoftwareSerial port mySerial.begin(9600); mySerial.println("Hello, world?"); } void loop() { // run over and over if (mySerial.available()) { Serial.println(mySerial.read()); } if (Serial.available()) { mySerial.println(Serial.read()); } } ```
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