Golang and Arduino

You can send command without any libraries to arduino. in this example "message" ( protocol) is "2 chars + number + number" -> "GO 123 -512" 

void setup() {
  Serial.begin(9600);
}

void loop() {
  // check if something on Serial
  if(Serial.available()) {
    // define variables
    long number1, number2;
    char cmd[2];
    memset(cmd, 0, 2);
    // read data from Serial
    String s = Serial.readStringUntil('\n');
    char buff[64];
    memset(buff, 0, 64);
    // convert string to char array
    s.toCharArray(buff, 64);
    // parse cmd to variables
    sscanf(buff, "%2c %ld %ld",cmd, &number1, &number2);
    char pr[128];
    memset(pr, 0, 128);
    // print template to buffer
    sprintf(pr, "got 2 numbers from serial: %ld and %ld and command %s", number1, number2, cmd);
    // print buffer back to Serial
    Serial.println(pr);
  }

}