Interfacing of CO2 sensor module with Arduino ATMega328 through ttl

Projects Programming
11

Dear Sir, I have written the general code and getting output as a ~€.
#include <SoftwareSerial.h>
SoftwareSerial mySerial(4, 5); // RX, TX
byte GetData[] = {0x80,0x02,0x00,0x7E};
void setup() {
// initialize serial:
Serial.begin(19200);
}
void loop()
{
Serial.write(GetData,sizeof(GetData));
}

while compiling the code, i am also getting overbaudrate 115200.