here’s the code I used:
int i = 0;
void setup() {
// put your setup code here, to run once:
SerialUSB.begin(115200);
Serial.begin(115200);
Serial1.begin(115200);
}
void loop() {
Serial.print(“Serial Loop #”);
Serial.println(i);
Serial1.print(“Serial1 Loop #”);
Serial1.println(i);
SerialUSB.print(“Serial USB Loop #”);
SerialUSB.println(i);
i++;
delay(500);
}