Serial Monitor Not Displaying Code From Setup or Main - Baud 9600

Question

In setup() the I have Serial.begin(9600), but there is no text being displayed whenever I have the Serial Monitor print anything. I have tried moving the location of the print() functions (including directly under Serial.begin()), but nothing has worked.

#include <Stepper.h>
#include "CommandTest.h"
#include "BlueSide.h"
#include "RedSide.h"
#include "GreenSide.h"
#include "YellowSide.h"
#include "OrangeSide.h"
#include "WhiteSide.h"

void setup(){
  Serial.begin(9600);
  delay(1);
  Serial.print("test"); //not displaying even this
  char temp[] = "wwwwwwwww";
  WhiteSide::setValue(temp);
  strcpy(temp, "rrrrrrrrr");
  RedSide::setValue(temp);
  strcpy(temp, "bbbbbbbbb");
  BlueSide::setValue(temp);
  strcpy(temp, "ooooooooo");
  OrangeSide::setValue(temp);
  strcpy(temp, "ggggggggg");
  GreenSide::setValue(temp);
  strcpy(temp, "yyyyyyyyy");
  YellowSide::setValue(temp);
  delay(1000);
}

void printCube(){
  Serial.println(WhiteSide::getArray());
  Serial.println(RedSide::getArray());
  Serial.println(BlueSide::getArray());
  Serial.println(OrangeSide::getArray());
  Serial.println(GreenSide::getArray());
  Serial.println(YellowSide::getArray());
}

int main(){
  CommandTest command;
  Serial.print("start");//not displaying this
  command.f();
  printCube();//and it's not printing these arrays
  delay(1000);
  command.fp();
  printCube();
  delay(1000);
  command.r();
  printCube();
  delay(1000);
  command.rp();
  printCube();
  delay(1000);
  command.l();
  printCube();
  delay(1000);
  command.lp();
  printCube();
  delay(1000);
  return 0;
}

jfowkes jfowkes · Accepted Answer · 2019-01-18T08:01:05

In your Arduino sketch you do not need to write a main function. The only required functions are setup and loop.

Your locally declared main is being used instead of the one supplied by the Arduino core (this is allowed because the arduino main comes from a library, so your main supercedes it). Therefore setup is never called.

Rename your int main() to void loop() and remove the return 0; from the end.

Serial Monitor Not Displaying Code From Setup or Main - Baud 9600

2 Answers