Clock Sketch (RTC) modified for 1.8" LCD

[palmerfarmer]

Just embarking on making the 'Real Time Clock Module, LCD Display and Controller Time' sketch to use with a 1.8" lcd 128x160 ST7735. Problem i have is trying to get it to display the correct format of time.
eg I would like to display:-
06:03:09 instead of 6: 3: 9 for the time and equivelant for the date too. This is a problem when the numbers reach double figures as you get false times because it doenst clear.

I think i need to use something similar to this;

if (digits < 10)
myGLCD.printNumI('0');

I am using the UTFT libraires but cannot work out the correct syntax.
the pic below is not a great example as the time when i took this was all double digit numbers the date and month are single. but need it to say 06/01/20

below is my code

/**
   The MySensors Arduino library handles the wireless radio link and protocol
   between your home built sensors/actuators and HA controller of choice.
   The sensors forms a self healing radio network with optional repeaters. Each
   repeater and gateway builds a routing tables in EEPROM which keeps track of the
   network topology allowing messages to be routed to nodes.

   Created by Henrik Ekblad <henrik.ekblad@mysensors.org>
   Copyright (C) 2013-2015 Sensnology AB
   Full contributor list: https://github.com/mysensors/Arduino/graphs/contributors

   Documentation: http://www.mysensors.org
   Support Forum: http://forum.mysensors.org

   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License
   version 2 as published by the Free Software Foundation.

 *******************************

  NB uses 1.8inch LCD rememeber to edit the memorysaver.h file and only leave ST7735

   REVISION HISTORY
   Version 1.0 - Henrik Ekblad

   DESCRIPTION
   Example sketch showing how to request time from controller which is stored in RTC module
   The time and temperature (DS3231/DS3232) is shown on an attached Crystal LCD display


   Wiring (radio wiring on www.mysensors.org)
   ------------------------------------
   Arduino   RTC-Module     I2C Display
   ------------------------------------
   GND       GND            GND
   +5V       VCC            VCC
   A4        SDA            SDA
   A5        SCL            SCL

   http://www.mysensors.org/build/display

*/

// Enable debug prints to serial monitor
//#define MY_DEBUG

// Enable and select radio type attached
#define MY_RADIO_RF24
#define MY_RF24_PA_LEVEL (RF24_PA_MIN)
#define MY_NODE_ID 40


//#define MY_RADIO_RFM69

#include <SPI.h>
#include <MySensors.h>
#include <TimeLib.h> //this is where tm.Hour tm.Min comes from
#include <DS3232RTC.h>  // A  DS3231/DS3232 library
#include <Wire.h>
#include <UTFT.h>

extern uint8_t BigFont[];
//extern uint8_t SmallFont[];
extern uint8_t Grotesk16x32[];


UTFT myGLCD(ITDB18SP, 5, 4, 8, 7, 6); //remember to edit the memorysaver.h file and only leave ST7735XX


bool timeReceived = false;
unsigned long lastUpdate = 0, lastRequest = 0;


void setup()
{
  // the function to get the time from the RTC
  setSyncProvider(RTC.get);

  // Request latest time from controller at startup
  requestTime();

  // initialize the lcd fort

  myGLCD.InitLCD(LANDSCAPE);// or PORTRAIT
  myGLCD.clrScr();

}

void presentation()  {
  // Send the sketch version information to the gateway and Controller
  sendSketchInfo("Clock Basic Master", "2.0");
}

// This is called when a new time value was received
void receiveTime(unsigned long controllerTime) {
  // Ok, set incoming time
  //Serial.print("Time value received: ");
  //Serial.println(controllerTime);
  RTC.set(controllerTime); // this sets the RTC to the time from controller - which we do want periodically
  timeReceived = true;
}

void loop()
{

  myGLCD.setColor(255, 255, 255);

  unsigned long now = millis();

  // If no time has been received yet, request it every 10 second from controller
  // When time has been received, request update every hour
  if ((!timeReceived && (now - lastRequest) > (10UL * 1000UL))
      || (timeReceived && (now - lastRequest) > (60UL * 1000UL * 60UL))) {
    // Request time from controller.
    //Serial.println("requesting time");
    requestTime();
    lastRequest = now;
  }

  // Update display every second
  if (now - lastUpdate > 1000) {
    updateDisplay();
    lastUpdate = now;
  }
}


void updateDisplay() {
  tmElements_t tm;
  RTC.read(tm);


  // Print date and time
  //lcd.home();

  myGLCD.setColor(80, 80, 200);
  myGLCD.setFont(Grotesk16x32);
  myGLCD.printNumI(tm.Hour, 10 , 20);
  myGLCD.print(":", 45, 20);
  myGLCD.printNumI(tm.Minute, CENTER, 20);
  myGLCD.print(":", 100, 20);
  myGLCD.printNumI(tm.Second, 115, 20);


  myGLCD.setFont(BigFont);
  myGLCD.setColor(255, 255, 0);
  myGLCD.printNumI(tm.Day, 15 , 65);
  myGLCD.print("/", 45, 65);
  myGLCD.printNumI(tm.Month, CENTER, 65);
  myGLCD.print("/" , 90, 65);
  myGLCD.printNumI(tmYearToCalendar(tm.Year) - 2000, 110, 65);


  myGLCD.print("T: ", 30, 95);
  myGLCD.printNumI(RTC.temperature() / 4, CENTER, 95 );
  myGLCD.print("o", 95, 90); // Degree-sign
  myGLCD.print("C", 107, 95);


}

/*
  void print2digits(int number) {
  if (number >= 0 && number < 10) {
    myGLCD.print("0",CENTER, 65 );
  }
  //   myGLCD.print(number);
  }




  /*

  void printNumI(int digits) {
  if (digits < 10)
  myGLCD.printNumI('0');
  myGLCD.print(digits);

  /*
  original sketch had this below for 16x4 LCD

  void printDigits(int digits) {
  if (digits < 10)
    lcd.print('0');
  lcd.print(digits);




  }
*/

[mfalkvidd]

@palmerfarmer printNumI actually accepts two more parameters:

UTFT::printNumI(long num, int x, int y, int length, char filler)

You want the length to be 2 and the filler to be '0'.

So change

myGLCD.printNumI(tm.Hour, 10 , 20);

to

myGLCD.printNumI(tm.Hour, 10 , 20, 2, '0');

(And similar for the other calls to printNumI where you want 2 numbers)

[palmerfarmer]

Thanks for the speedy reply, I owe you a beer! works perfectly.