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Newbie asking for help

newbie156 (6)
This is not my code, i found it as part of a geocache description on instructables, but havent gotten anny help on there.... it's basicly hangman for arduino, but i can't get the game to chose a random word from defined list and then implement that into the game, maybe someone here sees the error and can help me??
Untitled_Project.ino:193:25: error: no member named 'getChars' in 'String'
secretWord = guessWord.getChars();

code part 1

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#include <TrueRandom.h>
#include <Servo.h>  //Needed to control servo
#include <LiquidCrystal.h>
#include <WString.h>
#include <Print.h>

#define POTPIN 3
#define SPEAKERPIN 5
#define BUTTONPIN 6
#define servon 3  //power to servo
#define LASTBUTTONSTATE HIGH
#define DEBOUNCEDELAY 50
#define NUMWORDS 10
#define button2 3 //button inside box

//define notes for buzzer
#define LOWNOTE 100
#define ALOW 440
#define CLOW 261
#define ELOW 329
#define FLOW 349
#define CHIGH 523
#define EHIGH 659
#define GHIGH 784
#define FSHIGH 740
#define AHIGH 880

void(* resetFunc) (void) = 0;             //declare reset function @ address 0

const char* words[] = {"ATMOSPHERE", "VERBATIM", "POSTSCRIPT", "DEADLINE", "CENSORSHIP", "SHORTHAND", "MONKEY", "DICKHEAD", "DILEMMA", "INTERFACE"};
const char letterVal[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
char guessLetter;
//char guessWord;
char guessLast;
char guessed[25];
char* secretWord;
int guessedCount = 1;
int wordSize;
int gotOne = 0;
int alreadyGuessed = 0;
int showAsterisk = 0;
int buttonState;
int hangman = 0;
int totalRight = 0;
long lastDebounceTime = 0;
Servo lock;                   //create a servo object called lock
int button2on;                //integer for button inside box

LiquidCrystal lcd(12, 11, 2, 7, 8, 9, 10);
String guessWord = String(10);

// hangman graphic characters
byte topleft[] = { 0x1F, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10 };
byte topright[] = { 0x1C, 0x04, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00 };
byte bottomleft[] = { 0x10, 0x10, 0x10, 0x10, 0x10, 0x1F, 0x1F, 0x1F };
byte bottomright[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
byte head[] = { 0x1C, 0x04, 0x04, 0x0E, 0x0E, 0x00, 0x00, 0x00 };
byte topbody[] = { 0x1C, 0x04, 0x04, 0x0E, 0x0E, 0x04, 0x04, 0x04 };
byte bottombody[] = { 0x04, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
byte rightarm[] = { 0x1C, 0x04, 0x04, 0x0E, 0x0E, 0x05, 0x06, 0x04 };
byte leftarm[] = { 0x1C, 0x04, 0x04, 0x0E, 0x0E, 0x15, 0x0E, 0x04 };
byte rightleg[] = { 0x04, 0x04, 0x02, 0x02, 0x01, 0x00, 0x00, 0x00 };
byte leftleg[] = { 0x04, 0x04, 0x0A, 0x0A, 0x11, 0x00, 0x00, 0x00 };
byte leftarrow[] = { 0x10, 0x18, 0x1C, 0x1E, 0x1E, 0x1C, 0x18, 0x10 };
byte rightarrow[] = { 0x01, 0x03, 0x07, 0x0F, 0x0F, 0x07, 0x03, 0x01 };

void setup()
{
  
  lock.write(160);                //set lock servo to locked position before it is attatched to prevent servo from moving to 90 degrees on startup
  lock.attach(4);                 // Connected to servo to control lock
  Serial.begin(9600);
  pinMode (POTPIN, INPUT);
  pinMode (BUTTONPIN, INPUT);
  pinMode (SPEAKERPIN, OUTPUT);
//  pinMode (servon, OUTPUT);
  pinMode (button2, INPUT);
  
  lcd.begin(16, 2);
  
  lcd.clear();
  lcd.setCursor(1,0);
  lcd.print("Guess the word");
  lcd.setCursor(1,1);
  lcd.print("to get inside!");
  delay(2000);
  
  // pick a random word using analog 5 for random data
  randomSeed(analogRead(5));
    newWord();
  draw_board();
}

  
  //draw the board
  //draw_board();
  
 //digitalWrite(servon, HIGH);
 //lock.write(90);
 //delay(500);
//digitalWrite(servon, LOW);
  
//}

void newWord(){
  
  //pick a random word from the list
  int pick = TrueRandom.random(NUMWORDS);
 const char* pickWord = words[pick];
  guessWord = pickWord;
 secretWord = guessWord.getChars();
 wordSize = guessWord.length();
  Serial.println(guessWord);          // print the word to serial for cheaters like me ;) ...or for testing purposes.
}

void draw_board(){
  
  // define the custom characters
  lcd.createChar(0, topleft);
  lcd.createChar(1, topright);
  lcd.createChar(2, bottomleft);
  lcd.createChar(3, bottomright);
  lcd.createChar(4, leftarrow);
  lcd.createChar(5, rightarrow);
  
  // draw blank hangman table
  lcd.clear();
  lcd.home();
  lcd.write((uint8_t)0);
  lcd.write(1);
  lcd.setCursor(0,1);
  lcd.write(2);
  lcd.write(3);
  
  // print underlines
  lcd.setCursor(3,1);
  for (int x=0; x < wordSize; x++){
    lcd.print("_");
  }
}

void loop(){

 //enable button to open lock from inside to allow the lid to be closed when the box is open
  button2on = digitalRead(button2);
  if (button2on == HIGH)
  {
       digitalWrite(servon, HIGH);   //apply power to servo
      lock.write(10);               //move servo to position 10 degrees
      delay(5000);                  //Hold door lock open for 5 seconds
      lock.write(160);              //move servo to position 160 degrees
      delay(1000);                  //wait for servo to catch up
      digitalWrite(servon, LOW);   //shut off power to servo
  }
  
  
    

 // letter selection via potentiometer
  int potVal = analogRead(POTPIN) / 35;      // 1024 / 26 ~= 39
  guessLetter = letterVal[potVal];
  
  // if letter is different from last, print to lcd
  // this prevents from printing the same char over and over
  if (guessLetter != guessLast){
    guessLast = guessLetter;
    showAsterisk = 0;
    
    // cycle through all guessed letters and determine whether to show * or the letter
    for (int x=0; x < guessedCount; x++){
      if (guessLetter == guessed[x]){
        showAsterisk = 1;
      }
    }
    // print letters to the left of selected letter
    lcd.setCursor(3,0);
    for (int x=5; x >= 1 ; x--){
      if (potVal - x >= 0){ 
        lcd.print(letterVal[potVal - x]);
      }
      else{
        lcd.print("|");
      }
    }
    
    // print left arrow
    lcd.write(4);
    
    // print the letter
    if (showAsterisk == 0){
      lcd.setCursor(9,0);
      lcd.print(guessLetter);
      alreadyGuessed = 0;
    }
    // print a *
    else{
      lcd.setCursor(9,0);
      lcd.print("*");
      alreadyGuessed = 1;
    }
        
    // print right arrow
    lcd.write(5);
    
    // print letters to the right of selected letter
    lcd.setCursor(11,0);
    for (int x=1; x <= 5 ; x++){
      if (potVal + x <= 25){ 
        lcd.print(letterVal[potVal + x]);
      }
      else{
        lcd.print("|");
      }
    }
  }
  
  
  // select button...debounced
  int reading = digitalRead(BUTTONPIN);
  
  // filter out noise and debounce
  if (reading != LASTBUTTONSTATE) {
    lastDebounceTime = millis();
  }
  
  // if select button is pressed, check word for selected letter
  if ((millis() - lastDebounceTime) > DEBOUNCEDELAY) {
    gotOne = 0;
    if (alreadyGuessed == 0){
      alreadyGuessed = 1;
      lcd.setCursor(9,0);
      lcd.print("*");
      for (int i = 0; i < wordSize; i++) {
        if (secretWord[i] == guessLetter) {
          lcd.setCursor(i+3,1);
          lcd.print(guessLetter);
          gotOne = 1;
          totalRight = totalRight + 1;
        }
      }
 
      // add letter to guessed letter array
      guessed[guessedCount] = guessLetter;
      guessedCount++;
      lastDebounceTime = millis();

      // none of the letters match, draw the next body part on the hangman
      if (gotOne == 0){
        buzz(LOWNOTE, 500);
        hangman++;
        draw_hangman(hangman);
      }
      else{
        // letter is in word, sound buzzer
        buzz(FSHIGH, 30);
        buzz(AHIGH, 50); 
      }
      
      //all letters have been guessed...WIN!
      if (totalRight == wordSize){
        gameOver(1);
      }
    }
    // this letter has already been guessed, sound buzzer
  }
}

Last edited on
newbie156 (6)
code part 2

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void draw_hangman(int var){
  
  switch (var){
    case 1:  
      lcd.createChar(1, head);           // head
      break;
    case 2:
      lcd.createChar(1, topbody);        // body
      lcd.createChar(3, bottombody);
      break;
    case 3:
      lcd.createChar(1, rightarm);       // right arm
      break;
    case 4:
      lcd.createChar(1, leftarm);        // left arm
      break;
    case 5:
      lcd.createChar(3, rightleg);       // right leg
      break;
    case 6:
      lcd.createChar(3, leftleg);        // left leg
      break;
    case 7:
      gameOver(0);
    default:
      break;
  }
}

void gameOver(int whatToDo){
  
  // decide whether win, lose or restart game  
  switch (whatToDo){
    case 0:  // GAME OVER
      lcd.clear();
      lcd.setCursor(6,0);
      lcd.print("ACCESS");
      lcd.setCursor(6,1);
      lcd.print("DENIED");
    
      //buzzer sound
      buzz(ELOW, 500);                  // GAME OVER!
      buzz(CLOW, 1000);                 // sound buzzer
      break;
    case 1:  // WINNER
    
          // buzzer sound
      buzz(ALOW, 150);
      buzz(CHIGH, 150);
      buzz(EHIGH, 150);
      buzz(AHIGH, 150);
      delay(150);
      buzz(GHIGH, 150);
      buzz(AHIGH, 500);
      
      lcd.clear();
      lcd.setCursor(4,0);
      lcd.print("ACCESS");
      lcd.setCursor(4,1);
      lcd.print("GRANTED");
     digitalWrite(servon, HIGH);    //apply power to servo
      lock.write(10);               //move servo to position 10 degrees
      delay(5000);                  // Hold door lock open for 5 seconds
      lock.write(160);              //move servo to position 160 degrees
      delay(1000);                  //wait for servo to catch up
  //    digitalWrite(servon, LOW);   //shut off power to servo
       
    

  }
  delay(2000);
  resetFunc();      // reset arduino for a new game
}

void buzz (int frequencyInHertz, long timeInMilliseconds){  
  Serial.println(frequencyInHertz);	 
    long delayAmount = (long)(1000000/frequencyInHertz);
    long loopTime = (long)((timeInMilliseconds*1000)/(delayAmount*2));
    for (int x=0; x < loopTime; x++){ 	 
      digitalWrite(SPEAKERPIN, HIGH);
      delayMicroseconds(delayAmount);
      digitalWrite(SPEAKERPIN, LOW);
      delayMicroseconds(delayAmount);
    } 
    delay(20);
}
Last edited on
Albatross (4553)
This thread should really be in the General C++ Programming forum. Thanks for using code tags, though!

I'm going to assume that you're using Adruino's strings here. Indeed, in Adruino strings, I don't see a member called getChars(). There is, however, c_str(), which appears to do what you want.

https://www.arduino.cc/en/Reference/CStr

-Albatross
newbie156 (6)
Sorry my bad i thought i had it in the General C++ Programming forum, Can i or must a mod move it?
but if i replace secretWord = guessWord.getChars(); withsecretWord = guessWord.c_str(); i still get this error when trying to validate the code
Untitled_Project.ino:193:13: error: assigning to 'char *' from incompatible type 'const char *'
secretWord = guessWord.c_str();
so i can't transfer the script into my arduino.... :(
Albatross (4553)
If secretWord never gets modified, you could always declare it as const char* and fix that issue.

-Albatross
newbie156 (6)
but i thought that secretWord would get "modified" every time the game restart's and a new word get's picked from the word list...
newbie156 (6)
I'm not that good at reading codes but I'm guessing that:
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//pick a random word from the list
  int pick = TrueRandom.random(NUMWORDS);
 const char* pickWord = words[pick];
  guessWord = pickWord;
 secretWord = guessWord.getChars();
 wordSize = guessWord.length();
  Serial.println(guessWord);          // print the word to serial for cheaters like me ;) ...or for testing purposes.
}

Means that: first pick a random word from the list, then that word gets filtered into different definitions and in the end, the secret word line should tell the arduino wich word/letters I'm suposed to guess??
Albatross (4553)
Correction. If the values pointed to by secretWord never get modified through dereferencing secretWord (which I don't think they do), then you could always declare it as const char* and fix that issue.

-Albatross
newbie156 (6)
Took me some time to understand what you meant, but have now changed the beginning of the code to this:
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#include <Servo.h>  //Needed to control servo
#include <LiquidCrystal.h>
#include <WString.h>
#include <TrueRandom.h>

#define POTPIN 3
#define SPEAKERPIN 5
#define BUTTONPIN 6
#define servon 3  //power to servo
#define LASTBUTTONSTATE HIGH
#define DEBOUNCEDELAY 50
#define NUMWORDS 42
#define button2 3 //button inside box

//define notes for buzzer
#define LOWNOTE 100
#define ALOW 440
#define CLOW 261
#define ELOW 329
#define FLOW 349
#define CHIGH 523
#define EHIGH 659
#define GHIGH 784
#define FSHIGH 740
#define AHIGH 880

void(* resetFunc) (void) = 0;             //declare reset function @ address 0

const char* words[] = {"ab", "abb", "abbb", "abac", "abcd", "abcde",
                        "abcdes", "sadav", "fanon", "shintiyan", "avsdvas", "asdv", "nawab",
                       "avddv", "avdavs", "asdvasdv", "asdavae", "gamic", "avsad", "abvds",
                      "hygeia", "azygous", "bavin", "asdv", "asdvasdv", "bayadere",
                     "assegai", "homoousian", "pawky", "argrcvcvb", "abfdb", "adfbbadffg",
                       "hamose", "japanning", "canakin", "abfdbedh", "mazard", "abelectrolyze",
                       "agulpha", "amethodize", "hadji", "acequia"};
                     
const char letterVal[] = "abcdefghijklmnopqrstuvwxyz";
char guessLetter;
char guessLast;
char guessed[25];
const char* secretWord;
int guessedCount = 1;
int wordSize;
int gotOne = 0;
int alreadyGuessed = 0;
int showAsterisk = 0;
int buttonState;
int hangman = 0;
int totalRight = 0;
long lastDebounceTime = 0;
Servo lock;                   //create a servo object called lock
int button2on;                //integer for button inside box

LiquidCrystal lcd(12, 11, 2, 7, 8, 9, 10);
String guessWord = String(42);

// hangman graphic characters
byte topleft[] = { 0x1F, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10 };
byte topright[] = { 0x1C, 0x04, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00 };
byte bottomleft[] = { 0x10, 0x10, 0x10, 0x10, 0x10, 0x1F, 0x1F, 0x1F };
byte bottomright[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
byte head[] = { 0x1C, 0x04, 0x04, 0x0E, 0x0E, 0x00, 0x00, 0x00 };
byte topbody[] = { 0x1C, 0x04, 0x04, 0x0E, 0x0E, 0x04, 0x04, 0x04 };
byte bottombody[] = { 0x04, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
byte rightarm[] = { 0x1C, 0x04, 0x04, 0x0E, 0x0E, 0x05, 0x06, 0x04 };
byte leftarm[] = { 0x1C, 0x04, 0x04, 0x0E, 0x0E, 0x15, 0x0E, 0x04 };
byte rightleg[] = { 0x04, 0x04, 0x02, 0x02, 0x01, 0x00, 0x00, 0x00 };
byte leftleg[] = { 0x04, 0x04, 0x0A, 0x0A, 0x11, 0x00, 0x00, 0x00 };
byte leftarrow[] = { 0x10, 0x18, 0x1C, 0x1E, 0x1E, 0x1C, 0x18, 0x10 };
byte rightarrow[] = { 0x01, 0x03, 0x07, 0x0F, 0x0F, 0x07, 0x03, 0x01 };

void setup()
{
  
  lock.write(160);                //set lock servo to locked position before it is attatched to prevent servo from moving to 90 degrees on startup
  lock.attach(4);                 // Connected to servo to control lock
  Serial.begin(9600);
  pinMode (POTPIN, INPUT);
  pinMode (BUTTONPIN, INPUT);
  pinMode (SPEAKERPIN, OUTPUT);
//  pinMode (servon, OUTPUT);
  pinMode (button2, INPUT);
  
  lcd.begin(16, 2);
  
  lcd.clear();
  lcd.setCursor(1,0);
  lcd.print("Guess the word");
  lcd.setCursor(1,1);
  lcd.print("to get inside!");
  delay(2000);
  
  // pick a random word using analog 5 for random data
  //randomSeed(analogRead(4));
  newWord();
  
  //draw the board
  draw_board();
  
// digitalWrite(servon, HIGH);
 lock.write(160);
 delay(1000);
// digitalWrite(servon, LOW);
  
}

void newWord(){
  
  //pick a random word from the list
  int pick = TrueRandom.random(NUMWORDS);
  const char* pickWord = words[pick];
  guessWord = pickWord;
  secretWord = guessWord.c_str();
  wordSize = guessWord.length();
  Serial.println(guessWord);          // print the word to serial for cheaters like me ;) ...or for testing purposes.
}

And now everything works... :D thanks alot for all the help..... :D
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