Arduino UNO R3 serial port example: read input string via serial and print it back

gistfile1.txt

void setup()
{
    Serial.begin(1200);
    Serial.setTimeout(1000);
    Serial.println("Microcontroller has started");
}

int seqNum = 0;
String lastRead = "";

void loop()
{
    char log[128];

    sprintf(log, "%d going to read a string using time out of 1000ms", seqNum++);
    Serial.println(log);
    if (Serial.peek() == -1)
    {
        sprintf(log, "%d received nothing before timing out", seqNum++);
        delay(1000);
        Serial.println(log);
    }
    else
    {
        lastRead = Serial.readString();
    }

    sprintf(log, "%d last read string is: %s", seqNum++, lastRead.c_str());
    Serial.println(log);
}