How to read 115200 Baud digital signal on Arduino UNO?

Question

I am a beginner to microcontrollers. I am trying to use Arduino UNO to read data at 115200 Bd. I used SoftwareSerial.h as follows. But I do not think I got correct data. Could you help me take a look?

Thank you so much!

#include <SoftwareSerial.h>

SoftwareSerial mySerial(8,9);  //RX,TX

void setup()
{
  mySerial.begin(115200);
  Serial.begin(115200);
  Serial.println("starting...");

}

void loop()
{
  while(mySerial.available())
  {
    Serial.println(mySerial.read());
  }
}

Answer 1

SoftwareSerial only works up to 38400 bps, because running faster, it overloads the computation capability of the CPU. The documentation for SoftwareSerial on the arduino.cc site mentions this.

To read a 115200 kbps signal, you have to use the built-in serial port. If you also use that for programming, you're going to have to do some connecting/disconnecting each time you want to program your part -- or you can get an In-Circuit Serial Programmer and use that rather than the serial port for uploading. I recommend a Avr-ISP-2, which can be had for $35 at digikey. Ignore the CD that comes with it if you're using the Arduino IDE.

In general, a better source of support for Arduino-specific questions is the forums at arduino.cc.