Error with char parameter methods Arduino Code - arduino

Question

I keep getting the following error message when I'm trying to run my code. I can not figure out how to correct these errors so I can test everything. Even though these are just warning messages and the code says it uploads. I don't get any messages on my serial monitor printing any statements.
Code:
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x3F,16,2); // set the LCD address for a 16 chars and 2 line display
const int guessPin = 7;
const int switch0Pin = 13;
const int switch1Pin = 12;
const int switch2Pin = 11;
const int switch3Pin = 10;
const int switch4Pin = 9;
int currentLetterIndex = 0;
int currentClueIndex = 0;
int currentGuess = 0;
int lastGuess = 0;
bool debug = false; // set to false to turn off serial output
unsigned long previousMillis = 0;
long restInterval = 20 * 1000; // 20 second time out to conserve battery
char clueBreak[] = "Get clue at the next house :)";
char hintBreak[] = "ah ah ah... must be patient";
char answerBreak[] = "santa";
char clue1[] = "The place we first meet?";
char hint1[] = "Company... not city";
char answer1[] = "pcc";
char clue2[] = "The play we saw in NY";
char hint2[] = "muppets... no...";
char answer2[] = "avenueq";
char clue3[] = "What we worn in Times Square";
char hint3[] = "look me in the eyes...";
char answer3[] = "diapers";
char clue4[] = "Where I said 'I Love You'";
char hint4[] = "And you later threw up on me...";
char answer4[] = "tonys";
char clue5[] = "";
char hint5[] = "+++ ++ ++++ ++++";
char answer5[] = "";
char clue6[] = "When do we do anything?";
char hint6[] = "'bye' 'see you +++++++'";
char answer6[] = "maybe tomorrow";
char clue7[] = "The animal you pet in gatlinburg";
char hint7[] = "spell the numbers...";
char answer7[] = "jellyfish";
char clue8[] = "These are only in California";
char hint8[] = "the one you used to sleep with";
char answer8[] = "seven eleven";
char clue9[] = "Where did you buy your cat?";
char hint9[] = "(-_-) R-O-B-O-T";
char answer9[] = "japan";
char clue10[] = "The ugliest car color...";
char hint10[] = "your second favorite color";
char answer10[] = "yellow";
char clue11[] = "Our first wine and paint";
char hint11[] = "__ _____ _____";
char answer11[] = "no drama llama";
const int cluesNum = 10; // clues + breaks
char * hints[] = {
hint1,
hint2,
hint3,
hint4,
hint5,
hint6,
hint7,
hint8,
hint9,
hint10,
hint11,
};
char * clues[] = {
clue1,
clue2,
clue3,
clue4,
clue5,
clue6,
clue7,
clue8,
clue9,
clue10,
clue11,
};
char * answers[] = {
answer1,
answer2,
answer3,
answer4,
answer5,
answer6,
answer7,
answer8,
answer9,
answer10,
answer11,
};
char currentLine1[17]; // need extra char for null pointer
char currentLine2[17]; // need extra char for null pointer
bool isDisplayingClue = true;
void setup()
{
pinMode(guessPin, INPUT);
pinMode(switch0Pin, INPUT);
pinMode(switch1Pin, INPUT);
pinMode(switch2Pin, INPUT);
pinMode(switch3Pin, INPUT);
pinMode(switch4Pin, INPUT);
lcd.init();
lcd.backlight();
if (debug)
{
Serial.begin(9600);
}
}
void updateDisplayFromArray(const char *str)
{
int limit = getCharSize(str)-1;
for (int i = 0; i >= 16; i++)
{
if (i <= limit)
{
currentLine1[i] = str[i];
}
if (i+16 <= limit)
{
currentLine2[i] = str[i+16];
}
}
}
int getCharSize(const char *cArray)
{
return sizeof(cArray) / sizeof(char);
}
void logger(const char *message)
{
if (debug)
{
Serial.println(message);
}
}
void restLCD()
{
lcd.setBacklight(0);
lcd.noDisplay();
}
void showLCD()
{
isDisplayingClue = false;
previousMillis = millis();
lcd.setBacklight(50);
lcd.display();
}
void TypeAnimation(const char *line1, const char *line2, int delayTime)
{
lcd.clear();
for (int i = 0; i <= getCharSize(line1)-1; i++) {
lcd.setCursor(i,0);
lcd.print(line1[i]);
delay(delayTime);
}
for (int i = 0; i <= getCharSize(line2)-1; i++) {
lcd.setCursor(i,1);
lcd.print(line2[i]);
delay(delayTime);
if (i == getCharSize(line2)-1) {
delay(1000);
}
}
}
void DelayAnimation(const char *line1, const char *line2, int delayTime)
{
setScreen(line1, line2);
delay(delayTime);
}
void setScreen(const char *line1, const char *line2)
{
lcd.clear();
lcd.setCursor(0,0);
lcd.print(line1);
lcd.setCursor(0,1);
lcd.print(line2);
}
void TestAnimations()
{
showLCD();
PlayGuessingAnimation();
PlayCorrectAnimation();
PlayIncorrectAnimation();
ResetClues();
CurrentStatus();
ShowCurrentGuess();
DisplayClue(5000);
restLCD();
delay(5000);
currentLetterIndex++;
}
void ResetClues()
{
DelayAnimation("Resetting...", "",1500);
DelayAnimation("Merry Christmas!", "My Love :)",4000);
TypeAnimation("Old Man Turtle", "has been taken",250);
TypeAnimation("again...", ":(",250);
TypeAnimation("Solve the clues", "to find him",250);
TypeAnimation("Use the button 2", "submit da letter",250);
DelayAnimation("Now for your 1st", "clue",4000);
TypeAnimation("Goodluck my love", ":)",250);
NextClue();
currentLetterIndex = 0;
currentClueIndex = 0;
}
void ShowFinalAnimation()
{
TypeAnimation("You did it!", "",250);
TypeAnimation("You saved", "Old Man Turtle",250);
TypeAnimation("Old Man Turtle", "has left yo",250);
TypeAnimation("Use the button 2", "submit da letter",250);
DelayAnimation("Now for your 1st", "clue",4000);
TypeAnimation("Goodluck my love", ":)",250);
}
void loop()
{
logger("************* NEW LOOP *************");
//PlayGuessingGame();
TestAnimations();
}
void PlayGuessingGame()
{
bool buttonState = digitalRead(guessPin);
char *state = char(buttonState);
logger(state);
ConvertGuess();
if (buttonState)
{
logger("made it inside button guess clicked");
showLCD();
CheckGuess();
}
else
{
if (lastGuess != currentGuess)
{
logger("The guess has changed");
showLCD();
ShowCurrentGuess();
lastGuess = currentGuess;
}
else
{
logger("The guess hasn't changed :(");
if (!isDisplayingClue)
{
DisplayClue(1);
}
unsigned long currentMillis = millis();
if(currentMillis - previousMillis > restInterval * .7)
{
DelayAnimation(" About to enter ", "-- Rest Mode --",1500);
}
if(currentMillis - previousMillis > restInterval)
{
logger("...REST MODE ACTIVATED...");
restLCD();
}
}
}
if (currentClueIndex > cluesNum)
{
ShowFinalAnimation();
}
}
void ConvertGuess()
{
bitWrite(currentGuess,0, !digitalRead(switch0Pin));
bitWrite(currentGuess,1, !digitalRead(switch1Pin));
bitWrite(currentGuess,2, !digitalRead(switch2Pin));
bitWrite(currentGuess,3, !digitalRead(switch3Pin));
bitWrite(currentGuess,4, !digitalRead(switch4Pin));
logger("Beginning conversion of guess");
logger("Pin 0:" + char(!digitalRead(switch0Pin)));
logger("Pin 1:" + char(!digitalRead(switch1Pin)));
logger("Pin 2:" + char(!digitalRead(switch2Pin)));
logger("Pin 3:" + char(!digitalRead(switch3Pin)));
logger("Pin 4:" + char(!digitalRead(switch4Pin)));
logger("new guess is " + char(ConvertIntToLetter(currentGuess)));
}
void CheckGuess()
{
PlayGuessingAnimation();
char guessLetter = ConvertIntToLetter(currentGuess);
char cLetter = clues[currentClueIndex][currentLetterIndex];
if (guessLetter == '-')
{
ResetClues();
}
else if (guessLetter == '+')
{
CurrentStatus();
}
else if (guessLetter == '?')
{
DisplayHint(5000);
}
else if (guessLetter == cLetter)
{
currentLetterIndex++;
if (currentLetterIndex > getCharSize(clues[currentClueIndex])-1)
{
PlayNextClueAnimation();
currentLetterIndex = 0;
currentClueIndex++;
}
PlayCorrectAnimation();
}
else
{
PlayIncorrectAnimation();
}
}
void ShowCurrentGuess()
{
char guess = char(ConvertIntToLetter(currentGuess));
if (guess == '-')
{
DelayAnimation(" DANGER!!! ", "THIS WILL RESET!",5000);
DelayAnimation("Press the button", "will reset",2000);
}
else if (guess == '+')
{
DelayAnimation("This will", "Show current status",2000);
}
else if (guess == '?')
{
DelayAnimation("This will", "Show you a hint",2000);
}
else if (guess == ' ')
{
DelayAnimation("You're Guessing ", "'_' (space)",1500);
}
else
{
DelayAnimation("You're Guessing ", char(guess),1500);
}
}
void CurrentStatus()
{
char currentAnswer[17] = "";
if (currentLetterIndex == 0)
{
strcpy(currentAnswer, "nothing yet :(");
}
else
{
strcpy(currentAnswer, GetCorrectGuesses());
}
DelayAnimation("You've Guessed ", strcat(char(currentClueIndex), " Clues"), 2000);
DelayAnimation("The Current", "Clues Is...", 2000);
DisplayClue(2000);
DelayAnimation("You've got right", currentAnswer, 3000);
}
char GetCorrectGuesses()
{
char result[17];
for(int i = 0; i >= currentLetterIndex; i++)
{
result[i] = answers[currentClueIndex][i];
}
return result;
}
void DisplayClue(int delayTime)
{
updateDisplayFromArray(clues[currentClueIndex]);
DelayAnimation(currentLine1,currentLine1,delayTime);
isDisplayingClue = true;
}
void DisplayHint(int delayTime)
{
updateDisplayFromArray(hints[currentClueIndex]);
TypeAnimation(currentLine1,currentLine1,delayTime);
}
void NextClue()
{
DelayAnimation(" Are you ready?? ", " Clue #" + char(currentClueIndex+1),3000);
DisplayClue(5000);
}
void PlayGuessingAnimation()
{
TypeAnimation("That is...", "",200);
}
void PlayNextClueAnimation()
{
TypeAnimation("HOORAY!!!", "",200);
DelayAnimation("You Got It Right", " Go You ;) ",2000);
TypeAnimation("On to the next", "",200);
NextClue();
}
void PlayCorrectAnimation()
{
DelayAnimation(" CORRECT!!!! ", "",1500);
}
void PlayIncorrectAnimation()
{
DelayAnimation(" Wrong :( ", " Try Again ",2000);
}
char ConvertIntToLetter(int number)
{
int result = '0';
switch (number)
{
case 0:
result = 'a';
break;
case 1:
result = 'b';
break;
case 2:
result = 'c';
break;
case 3:
result = 'd';
break;
case 4:
result = 'e';
break;
case 5:
result = 'f';
break;
case 6:
result = 'g';
break;
case 7:
result = 'h';
break;
case 8:
result = 'i';
break;
case 9:
result = 'j';
break;
case 10:
result = 'k';
break;
case 11:
result = 'l';
break;
case 12:
result = 'm';
break;
case 13:
result = 'n';
break;
case 14:
result = 'o';
break;
case 15:
result = 'p';
break;
case 16:
result = 'q';
break;
case 17:
result = 'r';
break;
case 18:
result = 's';
break;
case 19:
result = 't';
break;
case 20:
result = 'u';
break;
case 21:
result = 'v';
break;
case 22:
result = 'w';
break;
case 23:
result = 'x';
break;
case 24:
result = 'y';
break;
case 25:
result = 'z';
break;
case 26:
result = '!';
break;
case 27:
result = '%';
break;
case 28:
result = ' ';
break;
case 29:
result = '?';
break;
case 30:
result = '-';
break;
case 31:
result = '+';
}
return result;
}
Error Messages:
C:\Users\jb090\Documents\Arduino\ChristmasBoxV3\ChristmasBoxV3.ino: In function 'void PlayGuessingGame()':
C:\Users\jb090\Documents\Arduino\ChristmasBoxV3\ChristmasBoxV3.ino:263:17: warning: invalid conversion from 'char' to 'char*' [-fpermissive]
char *state = char(buttonState);
^~~~~~~~~~~~~~~~~
C:\Users\jb090\Documents\Arduino\ChristmasBoxV3\ChristmasBoxV3.ino: In function 'void ShowCurrentGuess()':
C:\Users\jb090\Documents\Arduino\ChristmasBoxV3\ChristmasBoxV3.ino:378:40: warning: invalid conversion from 'char' to 'const char*' [-fpermissive]
DelayAnimation("You're Guessing ", char(guess),1500);
^~~~~~~~~~~
C:\Users\jb090\Documents\Arduino\ChristmasBoxV3\ChristmasBoxV3.ino:198:6: note: initializing argument 2 of 'void DelayAnimation(const char*, const char*, int)'
void DelayAnimation(const char *line1, const char *line2, int delayTime)
^~~~~~~~~~~~~~
C:\Users\jb090\Documents\Arduino\ChristmasBoxV3\ChristmasBoxV3.ino: In function 'void CurrentStatus()':
C:\Users\jb090\Documents\Arduino\ChristmasBoxV3\ChristmasBoxV3.ino:391:44: warning: invalid conversion from 'char' to 'const char*' [-fpermissive]
strcpy(currentAnswer, GetCorrectGuesses());
~~~~~~~~~~~~~~~~~^~
In file included from C:\Program Files (x86)\Arduino\hardware\arduino\avr\cores\arduino/Arduino.h:25:0,
from sketch\ChristmasBoxV3.ino.cpp:1:
c:\program files (x86)\arduino\hardware\tools\avr\avr\include\string.h:305:14: note: initializing argument 2 of 'char* strcpy(char*, const char*)'
extern char *strcpy(char *, const char *);
^~~~~~
C:\Users\jb090\Documents\Arduino\ChristmasBoxV3\ChristmasBoxV3.ino:393:44: warning: invalid conversion from 'char' to 'char*' [-fpermissive]
DelayAnimation("You've Guessed ", strcat(char(currentClueIndex), " Clues"), 2000);
^~~~~~~~~~~~~~~~~~~~~~
In file included from C:\Program Files (x86)\Arduino\hardware\arduino\avr\cores\arduino/Arduino.h:25:0,
from sketch\ChristmasBoxV3.ino.cpp:1:
c:\program files (x86)\arduino\hardware\tools\avr\avr\include\string.h:248:14: note: initializing argument 1 of 'char* strcat(char*, const char*)'
extern char *strcat(char *, const char *);
^~~~~~
C:\Users\jb090\Documents\Arduino\ChristmasBoxV3\ChristmasBoxV3.ino: In function 'char GetCorrectGuesses()':
C:\Users\jb090\Documents\Arduino\ChristmasBoxV3\ChristmasBoxV3.ino:406:10: warning: invalid conversion from 'char*' to 'char' [-fpermissive]
return result;
^~~~~~
C:\Users\jb090\Documents\Arduino\ChristmasBoxV3\ChristmasBoxV3.ino:401:8: warning: address of local variable 'result' returned [-Wreturn-local-addr]
char result[17];
^~~~~~

Answer 1

char and char* is very different !
const char* can be slightly more tricky, but you first have to get the difference between a text and a character.
"Hello World" is a text, and usually treated as a pointer or [const] array.
'A' is a character, and internally stored the same way as the number 65 in a variable of type char.
More:
c# (or java) and c++ are very different, too. And there's a lot of truth in the saying "c++ is for masochists" :)
Your first problem
warning: invalid conversion from 'char' to 'char*'
char *state = char(buttonState);
comes from these lines:
bool buttonState = digitalRead(guessPin);
char *state = char(buttonState);
logger(state);
logger(const char*) needs a text to log, but you have a bool. Not sure how you wrote that in c#, and casting won't help. You eventually might want something like
bool buttonState = digitalRead(guessPin);
logger(buttonState? "guessPin is set": "guessPin is LOW");

Answer 2

You cannot cast a variable as a char by doing char(buttonState). In C you cast as follows: (char)buttonState.

Answer 3

There were some minor errors in my code (like incorrect for loop syntax) that was causing me to have run time errors.