Ws2812 and arduino clocks

Using Arduino Programming Questions
1

I am trying to make a ws2812 and Arduino clock for the first time as a beginner, getting the error mentioned below. Tried codes from different authors, but getting the same error. Please help.
"Arduino: 1.8.19 (Windows 10), Board: "Arduino Uno"

C:\Users\we\Downloads\Compressed\231223\calligraphy\JAM DIGITAL PELANGI JUMBO\JAM_DIGITAL_PELANGI_JUMBO\JAM_DIGITAL_PELANGI_JUMBO.ino: In function 'int GetTime()':

JAM_DIGITAL_PELANGI_JUMBO:75:3: error: 'RTC' was not declared in this scope

RTC.read(Now);

^~~

C:\Users\we\Downloads\Compressed\231223\calligraphy\JAM DIGITAL PELANGI JUMBO\JAM_DIGITAL_PELANGI_JUMBO\JAM_DIGITAL_PELANGI_JUMBO.ino: In function 'void TempToArray()':

JAM_DIGITAL_PELANGI_JUMBO:160:3: error: 'RTC' was not declared in this scope

RTC.read(tm);

^~~

C:\Users\we\Downloads\Compressed\231223\calligraphy\JAM DIGITAL PELANGI JUMBO\JAM_DIGITAL_PELANGI_JUMBO\JAM_DIGITAL_PELANGI_JUMBO.ino: In function 'void TimeAdjust()':

JAM_DIGITAL_PELANGI_JUMBO:241:5: error: 'RTC' was not declared in this scope

 RTC.read(Now);

 ^~~

exit status 1

'RTC' was not declared in this scope

This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.
"

2

Welcome to the forum

Although you have not posted your sketch (hint !), I would guess that you have not created an instance of the real time object, or if you have it is not named RTC

3

If you want help, post your code.

Otherwise, it's like asking a mechanic to fix your car without letting her see your car.

4

Similar question

5

@robotlaukinh_tahawa - Even robots need to mind the guidelines and start their own topic and not hijack others.

6

@handy_writer

Anda perlu menyiarkan lakaran anda supaya orang boleh membacanya dan membantu anda.

You need to post your sketch so people can read it and help you.

7

///https://youtu.be/w1XMInQThNI(Please watch and Subscribe )

#include <DS3232RTC.h>
#include <TimeLib.h>
#include <Time.h>
#include <Wire.h>
#include <FastLED.h>
#include <RTClib.h>
)

#define NUM_LEDS 114 // 474 +2 Number of LED controlled
#define COLOR_ORDER GRB // Define color order for your strip
#define LED_PIN 9 // Data pin for led comunication
#define DST_PIN 5 // Define DST adjust button pin
#define MIN_PIN 4 // Define Minutes adjust button pin
#define HUR_PIN 2 // Define Hours adjust button pin
#define BRI_PIN 3 // Define Light sensor pin
CRGB leds[NUM_LEDS]; // Define LEDs strip
// 0,0,0,0
// 1,1,1,1
// 1 2 3 4 5 6 7 8 9 10111213141516171819202122232425262728
byte digits[12][28] = {{0,0,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}, // Digit 0
{0,0,0,0,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1}, // Digit 1
{1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,1,1,1,1,1,1,1,1,0,0,0,0}, // Digit 2
{1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,1}, // Digit 3
{1,1,1,1,1,1,1,1,0,0,0,0,1,1,1,1,0,0,0,0,0,0,0,0,1,1,1,1}, // Digit 4
{1,1,1,1,0,0,0,0,1,1,1,1,1,1,1,1,0,0,0,0,1,1,1,1,1,1,1,1}, // Digit 5
{1,1,1,1,0,0,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}, // Digit 6
{0,0,0,0,1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1}, // Digit 7
{1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}, // Digit 8
{1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,1,1,1,1,1,1,1,1}, // Digit 9 | 2D Array for numbers on 7 segment
{1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0}, // Digit *0
{0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,0}}; // Digit C

bool Dot = true; //Dot state
bool DST = true; //DST state// false to true
bool TempShow = false;
int last_digit = 0;

// int ledColor = 0x0000FF; // Color used (in hex)
long ledColor = CRGB::DarkOrchid; // Color used (in hex)
//long ledColor = CRGB::MediumVioletRed;
//Random colors i picked up
long ColorTable[21] = {
CRGB::Amethyst, //white
CRGB::Aqua, //pink
CRGB::Blue, //Blue
CRGB::Chartreuse,// Gold
CRGB::DarkGreen, //Red
CRGB::DarkMagenta,//Aqua
CRGB::DarkOrange, // yellow green
CRGB::DeepPink, //Aqua
CRGB::Fuchsia, //Sea blue
CRGB::Gold, //Gold
CRGB::GreenYellow,//off white
CRGB::LightCoral,//white
CRGB::Tomato,//white
CRGB::Salmon,//Pure white
CRGB::Red,// Drak Green
CRGB::Orchid,//blue white
CRGB::Sienna,//yellow white
CRGB::Purple,// aqua
CRGB::DarkOrange,//yellow green
CRGB::FloralWhite,//white
CRGB::Yellow //yellow
};

void setup(){
Serial.begin(9600);
Wire.begin();
FastLED.addLeds<WS2812B, LED_PIN, RGB>(leds, NUM_LEDS);
LEDS.setBrightness(20); // Set initial brightness
pinMode(DST_PIN, INPUT_PULLUP); // Define DST adjust button pin
pinMode(MIN_PIN, INPUT_PULLUP); // Define Minutes adjust button pin
pinMode(HUR_PIN, INPUT_PULLUP); // Define Hours adjust button pin
pinMode(BRI_PIN, INPUT_PULLUP); // Define bright adjust
TempShow = false; // do not show temperature
}

// Get time in a single number, if hours will be a single digit then time will be displayed 155 instead of 0155
int GetTime(){
tmElements_t Now;
RTC.read(Now);
//time_t Now = RTC.Now();// Getting the current Time and storing it into a DateTime object
int hour=Now.Hour;
int minute=Now.Minute;
int second =Now.Second;
if (second % 2==0) {Dot = false;}
else {Dot = true;};

if (hour >= 12) {
hour -= 12;
}
// Handle hour 0 (midnight) being shown as 12.
// else if (hour == 0) {
// hour += 12;
// }
return (hour*100+minute);
};

// Check Light sensor and set brightness accordingly
void BrightnessCheck(){
const byte sensorPin = 3; // light sensor pin
const byte brightnessLow = 75; // Low brightness value
const byte brightnessHigh = 20; // High brightness value
int sensorValue = digitalRead(sensorPin); // Read sensor
if (sensorValue == 0) {LEDS.setBrightness(brightnessHigh);}
else {LEDS.setBrightness(brightnessLow);}
};
// Convert time to array needed for display
void TimeToArray(){
int Now = GetTime(); // Get time

int cursor = 114; // last led number

// Serial.print("Time is: ");Serial.println(Now);
if (DST){ // if DST is true then add one hour
Now+=100;
// Serial.print("DST is ON, time set to : ");Serial.println(Now);
};
if (Dot){leds[57]=ledColor;
leds[56]=ledColor;}
else {leds[57]=0x000000;
leds[56]=0x000000;
};

for(int i=1;i<=4;i++){
int digit = Now % 10; // get last digit in time
if (i==1){
// Serial.print("Digit 4 is : ");Serial.print(digit);Serial.print(" ");

  cursor = 86;
  
  for(int k=0; k<=27;k++){ 
    // Serial.print(digits[digit][k]);
    if (digits[digit][k]== 1){leds[cursor]=ledColor;}
     else if (digits[digit][k]==0){leds[cursor]=0x000000;};
     cursor ++;
    };
  // Serial.println();

  if (digit != last_digit)
  {
    cylon();
    ledColor =  ColorTable[random(21)];
  }
  last_digit = digit;
  
  }
else if (i==2){
  // Serial.print("Digit 3 is : ");Serial.print(digit);Serial.print(" ");

  cursor =58;
  
  for(int k=0; k<=27;k++){ 
    // Serial.print(digits[digit][k]);
    if (digits[digit][k]== 1){leds[cursor]=ledColor;}
     else if (digits[digit][k]==0){leds[cursor]=0x000000;};
     cursor ++;
    };
  // Serial.println();
  }
 else if (i==3){
  // Serial.print("Digit 2 is : ");Serial.print(digit);Serial.print(" ");
  cursor =28;
  for(int k=0; k<=27;k++){ 
    // Serial.print(digits[digit][k]);
    if (digits[digit][k]== 1){leds[cursor]=ledColor;}
     else if (digits[digit][k]==0){leds[cursor]=0x000000;};
     cursor ++;
    };
  // Serial.println();
  }
else if (i==4){
  // Serial.print("Digit 1 is : ");Serial.print(digit);Serial.print(" ");
  cursor =0;
  if(digit !=0){
     for(int k=0; k<=27;k++){ 
    // Serial.print(digits[digit][k]);
    if (digits[digit][k]== 1){leds[cursor]=ledColor;}
     else if (digits[digit][k]==0){leds[cursor]=0x000000;};
     cursor ++;
    };
}
  if(digit ==0){
  for(int k=0; k<=27;k++){ 
    // Serial.print(digits[digit][k]);
    if (digits[12][k]== 1){leds[cursor]=ledColor;}
     else if (digits[12][k]==0){leds[cursor]=0x000000;};
     cursor ++;
    };
  
  // Serial.println();
  }
}
 Now /= 10;

};
};

// Convert temp to array needet for display
void TempToArray(){
tmElements_t tm;
RTC.read(tm);

if (tm.Second != 27) {
TempShow = false;
return;
}
TempShow = false;//true to false
int t = RTC.temperature();
int celsius = (t / 4.0) * 100;

Serial.print("Temp is: ");Serial.println(celsius);

int cursor = 114; // last led number

leds[42]=0x000000;
leds[43]=0x000000;

for(int i=1;i<=4;i++){
int digit = celsius % 10; // get last digit in time
if (i==1){
Serial.print("Digit 4 is : ");Serial.print(digit);Serial.print(" ");

  cursor = 86;
  
  for(int k=0; k<=27;k++){ 
    Serial.print(digits[11][k]);
    if (digits[11][k]== 1){leds[cursor]=ledColor;}
     else if (digits[11][k]==0){leds[cursor]=0x000000;};
     cursor ++;
    };
  Serial.println();
}
else if (i==2){
  Serial.print("Digit 3 is : ");Serial.print(digit);Serial.print(" ");

  cursor =58;
  
  for(int k=0; k<=27;k++){ 
    Serial.print(digits[10][k]);
    if (digits[10][k]== 1){leds[cursor]=ledColor;}
     else if (digits[10][k]==0){leds[cursor]=0x000000;};
     cursor ++;
    };
  Serial.println();
  }
else if (i==3){
  Serial.print("Digit 2 is : ");Serial.print(digit);Serial.print(" ");
  cursor =28;
  for(int k=0; k<=27;k++){ 
    Serial.print(digits[digit][k]);
    if (digits[digit][k]== 1){leds[cursor]=ledColor;}
     else if (digits[digit][k]==0){leds[cursor]=0x000000;};
     cursor ++;
    };
  Serial.println();
  }
else if (i==4){
  Serial.print("Digit 1 is : ");Serial.print(digit);Serial.print(" ");
  cursor =0;
  for(int k=0; k<=27;k++){ 
    Serial.print(digits[digit][k]);
    if (digits[digit][k]== 1){leds[cursor]=ledColor;}
     else if (digits[digit][k]==0){leds[cursor]=0x000000;};
     cursor ++;
    };
  Serial.println();
  }
celsius /= 10;

};
};

void DSTcheck(){
int buttonDST = digitalRead(5);
// Serial.print("DST is: ");Serial.println(DST);
if (buttonDST == LOW){
if (DST){
DST=false;
// Serial.print("Switching DST to: ");Serial.println(DST);
}
else if (!DST){
DST=true;
// Serial.print("Switching DST to: ");Serial.println(DST);
};
delay(500);
};
}

void TimeAdjust(){
int buttonH = digitalRead(HUR_PIN);
int buttonM = digitalRead(MIN_PIN);
if (buttonH == LOW || buttonM == LOW)
delay(500);
tmElements_t Now;
RTC.read(Now);
int hour=Now.Hour;
int minutes=Now.Minute;
int second =Now.Second;
if (buttonH == LOW){
if (Now.Hour== 23){Now.Hour=0;}
else {Now.Hour += 1;};
}else {
if (Now.Minute== 59){Now.Minute=0;}
else {Now.Minute += 1;};
// if (Now.Hour > 12){Now.Hour = Now.Hour -12;} // 24 to 12 hr
// else {Now.Hour = Now.Hour ;};
};
RTC.write(Now);
}
}

/* coool effect function*/
void fadeall() { for(int i = 0; i < NUM_LEDS; i++) { leds[i].nscale8(250); } }

void cylon () {
static uint8_t hue = 0;
Serial.print("x");
// First slide the led in one direction
for(int i = 0; i < NUM_LEDS; i++) {
// Set the i'th led to red
leds[i] = CHSV(hue++, 255, 255);
// Show the leds
FastLED.show();
// now that we've shown the leds, reset the i'th led to black
// leds[i] = CRGB::Black;
fadeall();
// Wait a little bit before we loop around and do it again
delay(10);
}
Serial.print("x");

// Now go in the other direction.
for(int i = (NUM_LEDS)-1; i >= 0; i--) {
// Set the i'th led to red
leds[i] = CHSV(hue++, 255, 255);
// Show the leds
FastLED.show();
// now that we've shown the leds, reset the i'th led to black
// leds[i] = CRGB::Black;
fadeall();
// Wait a little bit before we loop around and do it again
delay(10);
}
}

void loop() // Main loop
{
BrightnessCheck(); // Check brightness
DSTcheck(); // Check DST
TimeAdjust(); // Check to se if time is geting modified
TimeToArray(); // Get leds array with required configuration
TempToArray(); // Show Temperature
FastLED.show(); // Display leds array
if (TempShow == true) delay (8000);
}

8

@handy_writer
Please follow the advice given in the link below when posting code, in particular the section entitled 'Posting code and common code problems'

Use code tags (the < CODE/ > icon above the compose window) to make it easier to read and copy for examination

https://forum.arduino.cc/t/how-to-get-the-best-out-of-this-forum

9

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