cant make calculations

Projects Programming
1

hi this is my first time using arduino and I'm currently trying to make a heat sensor based on a value that can be keyed in.
when trying to run half way through, i received an error message that the calculation was not declared.

code:

#include <Wire.h>
#include <LiquidCrystal.h>
#include <Keypad.h>

float tempCelsius; // temperature in Celsius

const int rs = 12, en = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
LiquidCrystal lcd (12, 11, 5, 4, 3, 2);

const byte ROWS = 4;
const byte COLS = 4;

char Keys[ROWS][COLS] = {
{'1', '2', '3', 'A'},
{'4', '5', '6', 'B'},
{'7', '8', '9', 'C'},
{'*', '0', '=', 'D'}
};

byte rowPins[ROWS] = {9, 8, 7, 6};
byte colPins[COLS] = {5, 4, 3, 2};

Keypad customKeypad = Keypad(makeKeymap(Keys), rowPins, colPins, ROWS, COLS);

long Num1,Num2,Nombor;
char key,action;
boolean result = false;

const int buzzer = 10;
const int Sensor = A0;

void setup()
{
pinMode(Sensor, INPUT);
pinMode(buzzer, OUTPUT);

lcd.begin(16, 2);
lcd.setCursor(0, 0);
lcd.print(" Digital ");
lcd.setCursor(0, 1);
lcd.print(" Thermometer ");
delay(4000);
lcd.clear();

}

void loop()
{

float temp_reading =analogRead(Sensor);
float Temp =temp_reading*(5.0/1023.0)*100;

key = customKeypad.getKey();

if (key!=NO_KEY)
DetectButtons();

if (result==true)
CalculateResult();

DisplayResult();
}

void DetectButtons()

{
lcd.clear();
if (key=='*')
{Serial.println ("Button Cancel"); Nombor=Num1=Num2=0; result=false;}

if (key == '1')
{Serial.println ("Button 1");

if (Nombor==0)
Nombor=1;
else
Nombor = (Nombor*10) + 1;
}

error message:

In function 'void loop()':
61:17: error: 'CalculateResult' was not declared in this scope
63:15: error: 'DisplayResult' was not declared in this scope
In function 'void DetectButtons()':
80:5: error: expected '}' at end of input

any help is appreciated

2

Where are the function declarations and definitions for the CalculateResult() and DisplayResult() functions.

You are missing the } to close the DetectButtons() function.

Read the how to use this forum-please read sticky to see how to properly post code and some advice on how to ask an effective question. Remove useless white space and format the code with the IDE autoformat tool (crtl-t or Tools, Auto Format) before posting code.

Please include the entire error message. It is easy to do. There is a button (lower right of the IDE window) called "copy error message". Copy the error and paste into a post in code tags. Paraphrasing the error message leaves out important information.

3

Please edit your post to add code tags.

4

Exactly where are the DisplayResult() and CalculateResult() functions declared ?

Formatted using Auto format in the IDE and posted using code tags, which is the preferred method, your code looks like this

#include <Wire.h>
#include <LiquidCrystal.h>
#include <Keypad.h>

float tempCelsius;    // temperature in Celsius

const int rs = 12, en = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
LiquidCrystal lcd (12, 11, 5, 4, 3, 2);


const byte ROWS = 4;
const byte COLS = 4;

char Keys[ROWS][COLS] =
{
  {'1', '2', '3', 'A'},
  {'4', '5', '6', 'B'},
  {'7', '8', '9', 'C'},
  {'*', '0', '=', 'D'}
};

byte rowPins[ROWS] = {9, 8, 7, 6};
byte colPins[COLS] = {5, 4, 3, 2};

Keypad customKeypad = Keypad(makeKeymap(Keys), rowPins, colPins, ROWS, COLS);

long Num1, Num2, Nombor;
char key, action;
boolean result = false;

const int buzzer = 10;
const int Sensor = A0;

void setup()
{
  pinMode(Sensor, INPUT);
  pinMode(buzzer, OUTPUT);
  lcd.begin(16, 2);
  lcd.setCursor(0, 0);
  lcd.print("    Digital    ");
  lcd.setCursor(0, 1);
  lcd.print("  Thermometer   ");
  delay(4000);
  lcd.clear();
}

void loop()
{
  float temp_reading = analogRead(Sensor);
  float Temp = temp_reading * (5.0 / 1023.0) * 100;
  key = customKeypad.getKey();
  if (key != NO_KEY)
    DetectButtons();
  if (result == true)
    CalculateResult();
  DisplayResult();
}

void DetectButtons()
{
  lcd.clear();
  if (key == '*')
  {
    Serial.println ("Button Cancel");
    Nombor = Num1 = Num2 = 0;
    result = false;
  }
  if (key == '1')
  {
    Serial.println ("Button 1");
    if (Nombor == 0)
      Nombor = 1;
    else
      Nombor = (Nombor * 10) + 1;
  }

That shows up the third error as the final function does not end on the left margin. Did you miss out a large section of code when you posted it here by any chance ?

Incidentally I don't think that your DetectButtons() will do what you want but you have not explained what it should do

Maybe take a look at Keypad data entry