How to Add 12h time code

Projects General Guidance
1

I have this R2D2 project and it has a code that shows time but it only shows 24h style or military time. i would like to ask how to add 12h time to the code. The code works and functional. thank you

I am using a this items

image
image1920×1086 119 KB

and this is the code it came with it.

#include "WiFiManager.h"
#include "NTPClient.h"
#include "TM1637Display.h"
#include "DFRobotDFPlayerMini.h"
#include "AiEsp32RotaryEncoder.h"

//========================USEFUL VARIABLES=============================
uint16_t notification_volume= 15;
const char *ssid     = "SSID"; // put your SSID between the quotes mark
const char *password = "PASSWORD"; // put your wifi password between the quotes mark
int UTC = 2; // UTC + value in hour - Summer time
int Display_backlight = 3; // Set displays brightness 0 to 7;
//=====================================================================

#define ROTARY_ENCODER_A_PIN 25
#define ROTARY_ENCODER_B_PIN 26
#define ROTARY_ENCODER_BUTTON_PIN 27
#define RED_LED 32
#define WHITE_LED 33
#define ROTARY_ENCODER_STEPS 4
#define ROTARY_ENCODER_VCC_PIN -1

const byte RXD2 = 16; // Connects to module's TX 
const byte TXD2 = 17; // Connects to module's RX
const long utcOffsetInSeconds = 3600; // UTC + 2H / Offset in second
bool res;

AiEsp32RotaryEncoder rotaryEncoder = AiEsp32RotaryEncoder(ROTARY_ENCODER_A_PIN, ROTARY_ENCODER_B_PIN, ROTARY_ENCODER_BUTTON_PIN, ROTARY_ENCODER_VCC_PIN, ROTARY_ENCODER_STEPS);

void IRAM_ATTR readEncoderISR()
{
    rotaryEncoder.readEncoder_ISR();
}

#define FPSerial Serial1
DFRobotDFPlayerMini myDFPlayer;
void printDetail(uint8_t type, int value);

float counter = 0;
String currentDir = "";
unsigned long lastButtonPress = 0;
int btnState = 0;

int secondes = 0;
int minutes = 0;
float inc_red_led = 0;


// Define NTP Client to get time
WiFiUDP ntpUDP;
NTPClient timeClient(ntpUDP, "pool.ntp.org", utcOffsetInSeconds*UTC);
TM1637Display red1(21, 22);

void setup() {

  pinMode(RED_LED, OUTPUT);
  pinMode(WHITE_LED, OUTPUT);
    // configure LED PWM functionalitites
  ledcSetup(0, 5000, 8);
  // attach the channel to the GPIO to be controlled
  ledcAttachPin(RED_LED, 0);
  red1.setBrightness(Display_backlight);
  Serial.begin(9600);
  WiFi.begin(ssid, password);

  while ( WiFi.status() != WL_CONNECTED ) {
    delay ( 500 );
    Serial.print ( "." );
  }

  timeClient.begin();

  FPSerial.begin(9600, SERIAL_8N1, RXD2, TXD2);
  Serial.println();
  Serial.println(F("DFRobot DFPlayer Mini Demo"));
  Serial.println(F("Initializing DFPlayer ... (May take 3~5 seconds)"));
  
  if (!myDFPlayer.begin(FPSerial, /*isACK = */true, /*doReset = */true)) {  //Use serial to communicate with mp3.
    Serial.println(F("Unable to begin:"));
    Serial.println(F("1.Please recheck the connection!"));
    Serial.println(F("2.Please insert the SD card!"));
    while(true){
      delay(0); // Code to compatible with ESP8266 watch dog.
    }
  }
  Serial.println(F("DFPlayer Mini online."));
  
  myDFPlayer.volume(20);  //Set volume value. From 0 to 30
  myDFPlayer.play(1);  //Play the first mp3

  Serial.println("\n Starting");

  rotaryEncoder.begin();
  rotaryEncoder.setup(readEncoderISR);
  rotaryEncoder.setBoundaries(0, 3500, true); //minValue, maxValue, circleValues true|false (when max go to min and vice versa)
  rotaryEncoder.setAcceleration(250);

}

void loop() {

 timeClient.update();
 red1.showNumberDecEx(timeClient.getHours(),0b01000000,true,2,0);
 red1.showNumberDecEx(timeClient.getMinutes(),0b01000000,true,2,2);

  Serial.print("Time: ");
  Serial.println(timeClient.getFormattedTime());
  unsigned long epochTime = timeClient.getEpochTime();
  struct tm *ptm = gmtime ((time_t *)&epochTime); 
  int currentYear = ptm->tm_year+1900;
  Serial.print("Year: ");
  Serial.println(currentYear);
  
  int monthDay = ptm->tm_mday;
  Serial.print("Month day: ");
  Serial.println(monthDay);

  int currentMonth = ptm->tm_mon+1;
  Serial.print("Month: ");
  Serial.println(currentMonth);

  if (myDFPlayer.available()) {
    printDetail(myDFPlayer.readType(), myDFPlayer.read()); //Print the detail message from DFPlayer to handle different errors and states.
  }

  btnState = digitalRead(ROTARY_ENCODER_BUTTON_PIN);
  ledcWrite(0, inc_red_led);
  digitalWrite(WHITE_LED, LOW);

  //If we detect LOW signal, button is pressed
  if (btnState == LOW) {
    //if 50ms have passed since last LOW pulse, it means that the
    //button has been pressed, released and pressed again
    if (millis() - lastButtonPress > 50) {
      Serial.println("Button pressed!");
      Setup_timer();
    }

    // Remember last button press event
    lastButtonPress = millis();
  }

if ( inc_red_led <= 254)
   inc_red_led = inc_red_led + 0.1;
else inc_red_led = 0;

  delay(1);
if((currentMonth*30 + monthDay) >= 121 && (currentMonth*30 + monthDay) < 331){
timeClient.setTimeOffset(utcOffsetInSeconds*UTC);} // Change daylight saving time - Summer - change 31/03 at 00:00
else {timeClient.setTimeOffset((utcOffsetInSeconds*UTC) - 3600);} // Change daylight saving time - Winter - change 31/10 at 00:00

}

void Setup_timer() {

  red1.showNumberDecEx(88,0b01000000,true,2,0);
  red1.showNumberDecEx(88,0b01000000,true,2,2);

  digitalWrite(RED_LED, HIGH);
  digitalWrite(WHITE_LED, HIGH);
  myDFPlayer.play(2);
  delay(500);

  btnState = digitalRead(ROTARY_ENCODER_BUTTON_PIN);
  while (digitalRead(ROTARY_ENCODER_BUTTON_PIN) == HIGH) {
  
    if (rotaryEncoder.encoderChanged())
    {
        Serial.println(rotaryEncoder.readEncoder());
        counter = rotaryEncoder.readEncoder();
    }
    if (rotaryEncoder.isEncoderButtonClicked())
    {
        Serial.println("button pressed");
    }

    minutes = counter / 60;
    secondes =  ((counter / 60) - minutes) * 60;
    red1.showNumberDecEx(minutes,0b01000000,true,2,0);
    red1.showNumberDecEx(secondes,0b01000000,true,2,2);
    

  }
  Countdown(counter);
  Serial.println("Sortie de la boucle");
}


void Countdown (float timer_counter) {
  
  myDFPlayer.play(8);;
  delay(1000);
  btnState = digitalRead(ROTARY_ENCODER_BUTTON_PIN);

  while (btnState == HIGH )
  { 
    btnState = digitalRead(ROTARY_ENCODER_BUTTON_PIN);
    for (int i = 10 ; i > 0; i--) {

      timer_counter = timer_counter - 0.1;
      minutes = timer_counter / 60;
      secondes =  ((timer_counter / 60) - minutes) * 60;
  red1.showNumberDecEx(minutes,0b01000000,true,2,0);
  red1.showNumberDecEx(secondes,0b01000000,true,2,2);
      delay(70);
      digitalWrite(RED_LED, LOW);
    }

    if (timer_counter <= 0) {

      myDFPlayer.play(3);

      for ( int i = 0 ; i < 9 ; i++) {
        ledcWrite(0, 255);
        waitMilliseconds(random(10, 150));
        digitalWrite(WHITE_LED, HIGH);
        waitMilliseconds(random(10, 150));
        ledcWrite(0, 0);
        waitMilliseconds(random(10, 150));
        digitalWrite(WHITE_LED, LOW);
        waitMilliseconds(random(10, 150));
      }

      myDFPlayer.play(5);
      
      for ( int i = 0 ; i < 9 ; i++) {
        ledcWrite(0, 255);
        waitMilliseconds(random(10, 150));
        digitalWrite(WHITE_LED, HIGH);
        waitMilliseconds(random(10, 150));
        ledcWrite(0, 0);
        waitMilliseconds(random(10, 150));
        digitalWrite(WHITE_LED, LOW);
        waitMilliseconds(random(10, 150));
      }

      myDFPlayer.play(7);

      for ( int i = 0 ; i < 9 ; i++) {
        ledcWrite(0, 255);
        waitMilliseconds(random(10, 150));
        digitalWrite(WHITE_LED, HIGH);
        waitMilliseconds(random(10, 150));
        ledcWrite(0, 0);
        waitMilliseconds(random(10, 150));
        digitalWrite(WHITE_LED, LOW);
        waitMilliseconds(random(10, 150));
      }

      btnState = LOW;
      counter = 0;
    };
  }

}


void waitMilliseconds(uint16_t msWait)
{
  uint32_t start = millis();

  while ((millis() - start) < msWait)
  {
    // calling mp3.loop() periodically allows for notifications
    // to be handled without interrupts
    delay(1);
  }
}

void printDetail(uint8_t type, int value){
  switch (type) {
    case TimeOut:
      Serial.println(F("Time Out!"));
      break;
    case WrongStack:
      Serial.println(F("Stack Wrong!"));
      break;
    case DFPlayerCardInserted:
      Serial.println(F("Card Inserted!"));
      break;
    case DFPlayerCardRemoved:
      Serial.println(F("Card Removed!"));
      break;
    case DFPlayerCardOnline:
      Serial.println(F("Card Online!"));
      break;
    case DFPlayerUSBInserted:
      Serial.println("USB Inserted!");
      break;
    case DFPlayerUSBRemoved:
      Serial.println("USB Removed!");
      break;
    case DFPlayerPlayFinished:
      Serial.print(F("Number:"));
      Serial.print(value);
      Serial.println(F(" Play Finished!"));
      break;
    case DFPlayerError:
      Serial.print(F("DFPlayerError:"));
      switch (value) {
        case Busy:
          Serial.println(F("Card not found"));
          break;
        case Sleeping:
          Serial.println(F("Sleeping"));
          break;
        case SerialWrongStack:
          Serial.println(F("Get Wrong Stack"));
          break;
        case CheckSumNotMatch:
          Serial.println(F("Check Sum Not Match"));
          break;
        case FileIndexOut:
          Serial.println(F("File Index Out of Bound"));
          break;
        case FileMismatch:
          Serial.println(F("Cannot Find File"));
          break;
        case Advertise:
          Serial.println(F("In Advertise"));
          break;
        default:
          break;
      }
      break;
    default:
      break;
  }
  
}
2

Hello, do yourself a favour and please read How to get the best out of this forum and post accordingly (including details about your question, your code with code tags and necessary documentation for your ask like your exact circuit and power supply, links to components etc).

Please do not post in "Uncategorized"; see the sticky topics in https://forum.arduino.cc/c/using-arduino/uncategorized/184.

In the future, please take some time to pick the forum category that best suits the subject of your topic. There is an "About the _____ category" topic at the top of each category that explains its purpose.
This is an important part of responsible forum usage, as explained in the "How to get the best out of this forum" guide. The guide contains a lot of other useful information. Please read it.
Thanks in advance for your cooperation.

1 Like
3

Welcome! You have an interesting project, but first please read the advice in the topic "How to get the best from this forum". There is a proper way to post code, this allows us to help you. Taking what you posted and putting into a readable form takes a lot of time many do not want to spend. It will only take you another 10 seconds after your figure it out. l have no clue as to what each hardware device is or how it interacts with your code, post an annotated schematic, the language of electronics, showing how you have wired it, not pictures such as frizzy (wiring) drawings they are useless for troubleshooting. Do include links to "Technical information" on the hardware parts, links to sales outlets like azon are next to useless. Doing this will have a big positive effect on your answers and will improve the accuracy of the answer a lot.

I would sure like to help you but since you did not take the time to read the forum guidelines I will not burn the time trying to figure out the gibberish you posted. All I can say is good luck!

4

getHours(24);

5

Thank for this information. I fixed my post and hopefully this is right now and can be more helpful.

6

thanks for fixing your post.

in your code there is

  timeClient.update();
  red1.showNumberDecEx(timeClient.getHours(), 0b01000000, true, 2, 0);
  red1.showNumberDecEx(timeClient.getMinutes(), 0b01000000, true, 2, 2);

I assume this is the part where the hours and minutes are fetched and displayed.

if you want to display 5:25 when it's 17:25 you need to test the hours and if you are after 12 then subtract 12

may be something like this

  timeClient.update();
  int currentHour = timeClient.getHours();
  if (currentHour > 12) currentHour -= 12;
  red1.showNumberDecEx(currentHour, 0b01000000, true, 2, 0);
  red1.showNumberDecEx(timeClient.getMinutes(), 0b01000000, true, 2, 2);
1 Like
7

i will try this and see what if its going to show 12h format. thaks

8

It uploaded without any errors but , That did not work

9

Best to show what you changed otherwise it is of zero help to those trying to help you. Show some consideration.

10

Also tell us what happened on the screen

11

that is the thing. i did change the code to what it was shared by J-M-L Jackson but there is no change on the results. I uploaded it and show me it was uploaded and done compiling to the board and nothing change from the time format.

#include "WiFiManager.h"
#include "NTPClient.h"
#include "TM1637Display.h"
#include "DFRobotDFPlayerMini.h"
#include "AiEsp32RotaryEncoder.h"

//========================USEFUL VARIABLES=============================
uint16_t notification_volume= 15;
const char *ssid     = "SSID"; // put your SSID between the quotes mark
const char *password = "PASSWORD"; // put your wifi password between the quotes mark
int UTC = 2; // UTC + value in hour - Summer time
int Display_backlight = 3; // Set displays brightness 0 to 7;
//=====================================================================

#define ROTARY_ENCODER_A_PIN 25
#define ROTARY_ENCODER_B_PIN 26
#define ROTARY_ENCODER_BUTTON_PIN 27
#define RED_LED 32
#define WHITE_LED 33
#define ROTARY_ENCODER_STEPS 4
#define ROTARY_ENCODER_VCC_PIN -1

const byte RXD2 = 16; // Connects to module's TX 
const byte TXD2 = 17; // Connects to module's RX
const long utcOffsetInSeconds = 3600; // UTC + 2H / Offset in second
bool res;

AiEsp32RotaryEncoder rotaryEncoder = AiEsp32RotaryEncoder(ROTARY_ENCODER_A_PIN, ROTARY_ENCODER_B_PIN, ROTARY_ENCODER_BUTTON_PIN, ROTARY_ENCODER_VCC_PIN, ROTARY_ENCODER_STEPS);

void IRAM_ATTR readEncoderISR()
{
    rotaryEncoder.readEncoder_ISR();
}

#define FPSerial Serial1
DFRobotDFPlayerMini myDFPlayer;
void printDetail(uint8_t type, int value);

float counter = 0;
String currentDir = "";
unsigned long lastButtonPress = 0;
int btnState = 0;

int secondes = 0;
int minutes = 0;
float inc_red_led = 0;


// Define NTP Client to get time
WiFiUDP ntpUDP;
NTPClient timeClient(ntpUDP, "pool.ntp.org", utcOffsetInSeconds*UTC);
TM1637Display red1(21, 22);

void setup() {

  pinMode(RED_LED, OUTPUT);
  pinMode(WHITE_LED, OUTPUT);
    // configure LED PWM functionalitites
  ledcSetup(0, 5000, 8);
  // attach the channel to the GPIO to be controlled
  ledcAttachPin(RED_LED, 0);
  red1.setBrightness(Display_backlight);
  Serial.begin(9600);
  WiFi.begin(ssid, password);

  while ( WiFi.status() != WL_CONNECTED ) {
    delay ( 500 );
    Serial.print ( "." );
  }

  timeClient.begin();

  FPSerial.begin(9600, SERIAL_8N1, RXD2, TXD2);
  Serial.println();
  Serial.println(F("DFRobot DFPlayer Mini Demo"));
  Serial.println(F("Initializing DFPlayer ... (May take 3~5 seconds)"));
  
  if (!myDFPlayer.begin(FPSerial, /*isACK = */true, /*doReset = */true)) {  //Use serial to communicate with mp3.
    Serial.println(F("Unable to begin:"));
    Serial.println(F("1.Please recheck the connection!"));
    Serial.println(F("2.Please insert the SD card!"));
    while(true){
      delay(0); // Code to compatible with ESP8266 watch dog.
    }
  }
  Serial.println(F("DFPlayer Mini online."));
  
  myDFPlayer.volume(20);  //Set volume value. From 0 to 30
  myDFPlayer.play(1);  //Play the first mp3

  Serial.println("\n Starting");

  rotaryEncoder.begin();
  rotaryEncoder.setup(readEncoderISR);
  rotaryEncoder.setBoundaries(0, 3500, true); //minValue, maxValue, circleValues true|false (when max go to min and vice versa)
  rotaryEncoder.setAcceleration(250);

}

void loop() {

 timeClient.update();
int currentHour = timeClient.getHours();
  if (currentHour > 12) currentHour -= 12;
 red1.showNumberDecEx(timeClient.getHours(),0b01000000,true,2,0);
 red1.showNumberDecEx(timeClient.getMinutes(),0b01000000,true,2,2);

  Serial.print("Time: ");
  Serial.println(timeClient.getFormattedTime());
  unsigned long epochTime = timeClient.getEpochTime();
  struct tm *ptm = gmtime ((time_t *)&epochTime); 
  int currentYear = ptm->tm_year+1900;
  Serial.print("Year: ");
  Serial.println(currentYear);
  
  int monthDay = ptm->tm_mday;
  Serial.print("Month day: ");
  Serial.println(monthDay);

  int currentMonth = ptm->tm_mon+1;
  Serial.print("Month: ");
  Serial.println(currentMonth);

  if (myDFPlayer.available()) {
    printDetail(myDFPlayer.readType(), myDFPlayer.read()); //Print the detail message from DFPlayer to handle different errors and states.
  }

  btnState = digitalRead(ROTARY_ENCODER_BUTTON_PIN);
  ledcWrite(0, inc_red_led);
  digitalWrite(WHITE_LED, LOW);

  //If we detect LOW signal, button is pressed
  if (btnState == LOW) {
    //if 50ms have passed since last LOW pulse, it means that the
    //button has been pressed, released and pressed again
    if (millis() - lastButtonPress > 50) {
      Serial.println("Button pressed!");
      Setup_timer();
    }

    // Remember last button press event
    lastButtonPress = millis();
  }

if ( inc_red_led <= 254)
   inc_red_led = inc_red_led + 0.1;
else inc_red_led = 0;

  delay(1);
if((currentMonth*30 + monthDay) >= 121 && (currentMonth*30 + monthDay) < 331){
timeClient.setTimeOffset(utcOffsetInSeconds*UTC);} // Change daylight saving time - Summer - change 31/03 at 00:00
else {timeClient.setTimeOffset((utcOffsetInSeconds*UTC) - 3600);} // Change daylight saving time - Winter - change 31/10 at 00:00

}

void Setup_timer() {

  red1.showNumberDecEx(88,0b01000000,true,2,0);
  red1.showNumberDecEx(88,0b01000000,true,2,2);

  digitalWrite(RED_LED, HIGH);
  digitalWrite(WHITE_LED, HIGH);
  myDFPlayer.play(2);
  delay(500);

  btnState = digitalRead(ROTARY_ENCODER_BUTTON_PIN);
  while (digitalRead(ROTARY_ENCODER_BUTTON_PIN) == HIGH) {
  
    if (rotaryEncoder.encoderChanged())
    {
        Serial.println(rotaryEncoder.readEncoder());
        counter = rotaryEncoder.readEncoder();
    }
    if (rotaryEncoder.isEncoderButtonClicked())
    {
        Serial.println("button pressed");
    }

    minutes = counter / 60;
    secondes =  ((counter / 60) - minutes) * 60;
    red1.showNumberDecEx(minutes,0b01000000,true,2,0);
    red1.showNumberDecEx(secondes,0b01000000,true,2,2);
    

  }
  Countdown(counter);
  Serial.println("Sortie de la boucle");
}


void Countdown (float timer_counter) {
  
  myDFPlayer.play(8);;
  delay(1000);
  btnState = digitalRead(ROTARY_ENCODER_BUTTON_PIN);

  while (btnState == HIGH )
  { 
    btnState = digitalRead(ROTARY_ENCODER_BUTTON_PIN);
    for (int i = 10 ; i > 0; i--) {

      timer_counter = timer_counter - 0.1;
      minutes = timer_counter / 60;
      secondes =  ((timer_counter / 60) - minutes) * 60;
  red1.showNumberDecEx(minutes,0b01000000,true,2,0);
  red1.showNumberDecEx(secondes,0b01000000,true,2,2);
      delay(70);
      digitalWrite(RED_LED, LOW);
    }

    if (timer_counter <= 0) {

      myDFPlayer.play(3);

      for ( int i = 0 ; i < 9 ; i++) {
        ledcWrite(0, 255);
        waitMilliseconds(random(10, 150));
        digitalWrite(WHITE_LED, HIGH);
        waitMilliseconds(random(10, 150));
        ledcWrite(0, 0);
        waitMilliseconds(random(10, 150));
        digitalWrite(WHITE_LED, LOW);
        waitMilliseconds(random(10, 150));
      }

      myDFPlayer.play(5);
      
      for ( int i = 0 ; i < 9 ; i++) {
        ledcWrite(0, 255);
        waitMilliseconds(random(10, 150));
        digitalWrite(WHITE_LED, HIGH);
        waitMilliseconds(random(10, 150));
        ledcWrite(0, 0);
        waitMilliseconds(random(10, 150));
        digitalWrite(WHITE_LED, LOW);
        waitMilliseconds(random(10, 150));
      }

      myDFPlayer.play(7);

      for ( int i = 0 ; i < 9 ; i++) {
        ledcWrite(0, 255);
        waitMilliseconds(random(10, 150));
        digitalWrite(WHITE_LED, HIGH);
        waitMilliseconds(random(10, 150));
        ledcWrite(0, 0);
        waitMilliseconds(random(10, 150));
        digitalWrite(WHITE_LED, LOW);
        waitMilliseconds(random(10, 150));
      }

      btnState = LOW;
      counter = 0;
    };
  }

}


void waitMilliseconds(uint16_t msWait)
{
  uint32_t start = millis();

  while ((millis() - start) < msWait)
  {
    // calling mp3.loop() periodically allows for notifications
    // to be handled without interrupts
    delay(1);
  }
}

void printDetail(uint8_t type, int value){
  switch (type) {
    case TimeOut:
      Serial.println(F("Time Out!"));
      break;
    case WrongStack:
      Serial.println(F("Stack Wrong!"));
      break;
    case DFPlayerCardInserted:
      Serial.println(F("Card Inserted!"));
      break;
    case DFPlayerCardRemoved:
      Serial.println(F("Card Removed!"));
      break;
    case DFPlayerCardOnline:
      Serial.println(F("Card Online!"));
      break;
    case DFPlayerUSBInserted:
      Serial.println("USB Inserted!");
      break;
    case DFPlayerUSBRemoved:
      Serial.println("USB Removed!");
      break;
    case DFPlayerPlayFinished:
      Serial.print(F("Number:"));
      Serial.print(value);
      Serial.println(F(" Play Finished!"));
      break;
    case DFPlayerError:
      Serial.print(F("DFPlayerError:"));
      switch (value) {
        case Busy:
          Serial.println(F("Card not found"));
          break;
        case Sleeping:
          Serial.println(F("Sleeping"));
          break;
        case SerialWrongStack:
          Serial.println(F("Get Wrong Stack"));
          break;
        case CheckSumNotMatch:
          Serial.println(F("Check Sum Not Match"));
          break;
        case FileIndexOut:
          Serial.println(F("File Index Out of Bound"));
          break;
        case FileMismatch:
          Serial.println(F("Cannot Find File"));
          break;
        case Advertise:
          Serial.println(F("In Advertise"));
          break;
        default:
          break;
      }
      break;
    default:
      break;
  }
  
}
12

This is not what I suggested…

Check again precisely my code…

13

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