arduino mega serial

hello,

how can i see serial monitor of serial3 ?

  • Connect a serial adapter to the Serial3 pins (an FT232 or CH340 breakout for example).
  • Connect the serial adapter to your computer. If it's the first time connecting you may need to install the driver.
  • Select the port of the serial adapter from the Tools > Port menu in the Arduino IDE.
  • Open Serial Monitor.
  • Make sure the baud rate menu in the bottom right corner matches the baud rate you set via Serial3.begin() in your sketch.

i am using the 4 serials but need to monitor serial 3 only how can i do so ?

I just told you. If you follow those instructions and encounter a problem then you will need to provide detailed information so we can help you.

samarhefina:
hello,

how can i see serial monitor of serial3 ?

Let's assume, you have connected a GPS module to Serial3:

You could read incoming characters from Serial3 and write them back to Serial.

void loop()
{
if(Serial3.available()) Serial.write(Serial3.read());
}

That way you ca redirect incoming chars from the GPS module to the serial monitor