RTC DS1302 Clock on Nokia5110 with a Nano

Real Time Clock DS1302 using Arduino nano, Power Saver and Pir activated backlight (optional)

Apr 29, 2022

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Components and supplies

Nokia 5110 LCD

rtc ds1302 module

Arduino Nano R3

Breadboard (generic)

Pir module

Project description

Code

RTC Nokia5110 and Nano

arduino

1#include <Arduino.h>
2#include <Ds1302.h>
3#include <Adafruit_PCD8544.h>  // include adafruit PCD8544 (Nokia 5110) library
4#include <LowPower.h>
5  int Pir = 11;
6 int Screen = 10;
7 bool State = false;
8
9 
10// DS1302  RTC instance
11Ds1302 rtc(9,7,8); // 
12// Nokia 5110 LCD module connections CLK,  DIN, D/C, CS, RST (opposite to the actual pin positions !!)
13Adafruit_PCD8544  display = Adafruit_PCD8544(6,5,4,3,2);
14const static char* WeekDays[] =
15{
16    "  Mon   ",
17    " Tues   ",
18    "  Wed   ",
19    " Thurs  ",
20    "  Fri   ",
21    "  Sat   ",
22    "  Sun   "
23};
24
25
26void  setup() {
27    pinMode(Pir,INPUT);
28    pinMode(Screen,OUTPUT);
29    display.begin();
30    // initialize the RTC
31    rtc.init();
32    display.setContrast(60);
33    display.clearDisplay();   // clears the screen and buffer
34    display.drawRect(0,  0, 84, 30, BLACK);
35    display.drawRect(0, 29, 84, 12, BLACK);
36    
37}
38
39
40void  loop()
41{
42    if (digitalRead(Pir) == HIGH && State == false)  {
43      digitalWrite(Screen,HIGH);
44      State = true;
45    }
46    if (digitalRead(Pir) == LOW && State == true)  {
47      digitalWrite(Screen,LOW);
48      State = false;
49    }
50    //  get the current time
51    Ds1302::DateTime now;
52    rtc.getDateTime(&now);
53    static uint8_t last_second = 0;
54    if (last_second != now.second)
55    {
56        last_second = now.second;
57
58        display.setTextColor(BLACK);
59        display.setTextSize(2);
60        display.setCursor(6,10);
61        if  (now.hour <= 9) { //If Hour is single figures, put a 0 in front
62        display.print("0");
63        }
64        display.print(now.hour);
65        display.print(":");
66     if (now.minute <= 9) {  //If Minute is single figures, put a 0 in front
67        display.print("0");
68     }
69        display.print(now.minute);
70  //      display.print(":");
71        display.setTextSize(1); 
72        if  (now.second <= 9) {  //If Seconds is single figures, put a 0 in front
73        display.print("0");
74     } 
75        display.print(now.second);
76
77        
78        display.setCursor(0,31);
79        display.print(WeekDays[now.dow -1]);
80        display.print(now.day);
81        display.print("/");
82        display.print(now.month);
83        
84        display.display();
85
86        
87        display.setTextColor(WHITE);
88        display.setCursor(0,31);
89        display.print(WeekDays[now.dow -1]);
90        display.print(now.day);
91        display.print("/");
92        display.print(now.month);           
93        
94                
95        
96        display.setTextSize(2);
97        display.setCursor(6,10);
98     if (now.hour <= 9) {
99        display.print("0");
100    }
101       display.print(now.hour);
102       display.print(":");
103     if  (now.minute <= 9) {
104       display.print("0");
105  }
106       display.print(now.minute);
107  //     display.print(":");
108       display.setTextSize(1);
109     if (now.second  <= 9) {
110       display.print("0");
111  } 
112      display.print(now.second);
113  
114// No need to display the screen again
115 
116    }
117  //  delay(100);
118  LowPower.powerDown(SLEEP_250MS,ADC_OFF,BOD_OFF);
119}
120

#include <Arduino.h>
#include <Ds1302.h>
#include <Adafruit_PCD8544.h>  // include adafruit PCD8544 (Nokia 5110) library
#include <LowPower.h>
  int Pir = 11;
 int Screen = 10;
 bool State = false;

 
// DS1302  RTC instance
Ds1302 rtc(9,7,8); // 
// Nokia 5110 LCD module connections CLK,  DIN, D/C, CS, RST (opposite to the actual pin positions !!)
Adafruit_PCD8544  display = Adafruit_PCD8544(6,5,4,3,2);
const static char* WeekDays[] =
{
    "  Mon   ",
    " Tues   ",
    "  Wed   ",
    " Thurs  ",
    "  Fri   ",
    "  Sat   ",
    "  Sun   "
};


void  setup() {
    pinMode(Pir,INPUT);
    pinMode(Screen,OUTPUT);
    display.begin();
    // initialize the RTC
    rtc.init();
    display.setContrast(60);
    display.clearDisplay();   // clears the screen and buffer
    display.drawRect(0,  0, 84, 30, BLACK);
    display.drawRect(0, 29, 84, 12, BLACK);
    
}


void  loop()
{
    if (digitalRead(Pir) == HIGH && State == false)  {
      digitalWrite(Screen,HIGH);
      State = true;
    }
    if (digitalRead(Pir) == LOW && State == true)  {
      digitalWrite(Screen,LOW);
      State = false;
    }
    //  get the current time
    Ds1302::DateTime now;
    rtc.getDateTime(&now);
    static uint8_t last_second = 0;
    if (last_second != now.second)
    {
        last_second = now.second;

        display.setTextColor(BLACK);
        display.setTextSize(2);
        display.setCursor(6,10);
        if  (now.hour <= 9) { //If Hour is single figures, put a 0 in front
        display.print("0");
        }
        display.print(now.hour);
        display.print(":");
     if (now.minute <= 9) {  //If Minute is single figures, put a 0 in front
        display.print("0");
     }
        display.print(now.minute);
  //      display.print(":");
        display.setTextSize(1); 
        if  (now.second <= 9) {  //If Seconds is single figures, put a 0 in front
        display.print("0");
     } 
        display.print(now.second);

        
        display.setCursor(0,31);
        display.print(WeekDays[now.dow -1]);
        display.print(now.day);
        display.print("/");
        display.print(now.month);
        
        display.display();

        
        display.setTextColor(WHITE);
        display.setCursor(0,31);
        display.print(WeekDays[now.dow -1]);
        display.print(now.day);
        display.print("/");
        display.print(now.month);           
        
                
        
        display.setTextSize(2);
        display.setCursor(6,10);
     if (now.hour <= 9) {
        display.print("0");
    }
       display.print(now.hour);
       display.print(":");
     if  (now.minute <= 9) {
       display.print("0");
  }
       display.print(now.minute);
  //     display.print(":");
       display.setTextSize(1);
     if (now.second  <= 9) {
       display.print("0");
  } 
      display.print(now.second);
  
// No need to display the screen again
 
    }
  //  delay(100);
  LowPower.powerDown(SLEEP_250MS,ADC_OFF,BOD_OFF);
}

RTC Nokia5110 and Nano

arduino

1#include <Arduino.h>
2#include <Ds1302.h>
3#include <Adafruit_PCD8544.h>
4  // include adafruit PCD8544 (Nokia 5110) library
5#include <LowPower.h>
6
7  int Pir = 11;
8 int Screen = 10;
9 bool State = false;
10
11 
12// DS1302
13  RTC instance
14Ds1302 rtc(9,7,8); // 
15// Nokia 5110 LCD module connections CLK,
16  DIN, D/C, CS, RST (opposite to the actual pin positions !!)
17Adafruit_PCD8544
18  display = Adafruit_PCD8544(6,5,4,3,2);
19const static char* WeekDays[] =
20{
21
22    "  Mon   ",
23    " Tues   ",
24    "  Wed   ",
25    " Thurs  ",
26
27    "  Fri   ",
28    "  Sat   ",
29    "  Sun   "
30};
31
32
33void
34  setup() {
35    pinMode(Pir,INPUT);
36    pinMode(Screen,OUTPUT);
37    display.begin();
38
39    // initialize the RTC
40    rtc.init();
41    display.setContrast(60);
42
43    display.clearDisplay();   // clears the screen and buffer
44    display.drawRect(0,
45  0, 84, 30, BLACK);
46    display.drawRect(0, 29, 84, 12, BLACK);
47    
48}
49
50
51void
52  loop()
53{
54    if (digitalRead(Pir) == HIGH && State == false)  {
55      digitalWrite(Screen,HIGH);
56
57      State = true;
58    }
59    if (digitalRead(Pir) == LOW && State == true)
60  {
61      digitalWrite(Screen,LOW);
62      State = false;
63    }
64    //
65  get the current time
66    Ds1302::DateTime now;
67    rtc.getDateTime(&now);
68
69    static uint8_t last_second = 0;
70    if (last_second != now.second)
71    {
72
73        last_second = now.second;
74
75        display.setTextColor(BLACK);
76
77        display.setTextSize(2);
78        display.setCursor(6,10);
79        if
80  (now.hour <= 9) { //If Hour is single figures, put a 0 in front
81        display.print("0");
82
83        }
84        display.print(now.hour);
85        display.print(":");
86
87     if (now.minute <= 9) {  //If Minute is single figures, put a 0 in front
88
89        display.print("0");
90     }
91        display.print(now.minute);
92
93  //      display.print(":");
94        display.setTextSize(1); 
95        if
96  (now.second <= 9) {  //If Seconds is single figures, put a 0 in front
97        display.print("0");
98
99     } 
100        display.print(now.second);
101
102        
103        display.setCursor(0,31);
104
105        display.print(WeekDays[now.dow -1]);
106        display.print(now.day);
107
108        display.print("/");
109        display.print(now.month);
110        
111
112        display.display();
113
114        
115        display.setTextColor(WHITE);
116
117        display.setCursor(0,31);
118        display.print(WeekDays[now.dow -1]);
119
120        display.print(now.day);
121        display.print("/");
122        display.print(now.month);
123           
124        
125                
126        
127        display.setTextSize(2);
128
129        display.setCursor(6,10);
130     if (now.hour <= 9) {
131        display.print("0");
132
133    }
134       display.print(now.hour);
135       display.print(":");
136     if
137  (now.minute <= 9) {
138       display.print("0");
139  }
140       display.print(now.minute);
141
142  //     display.print(":");
143       display.setTextSize(1);
144     if (now.second
145  <= 9) {
146       display.print("0");
147  } 
148      display.print(now.second);
149
150  
151// No need to display the screen again
152 
153    }
154  //  delay(100);
155
156  LowPower.powerDown(SLEEP_250MS,ADC_OFF,BOD_OFF);
157}
158

#include <Arduino.h>
#include <Ds1302.h>
#include <Adafruit_PCD8544.h>
  // include adafruit PCD8544 (Nokia 5110) library
#include <LowPower.h>

  int Pir = 11;
 int Screen = 10;
 bool State = false;

 
// DS1302
  RTC instance
Ds1302 rtc(9,7,8); // 
// Nokia 5110 LCD module connections CLK,
  DIN, D/C, CS, RST (opposite to the actual pin positions !!)
Adafruit_PCD8544
  display = Adafruit_PCD8544(6,5,4,3,2);
const static char* WeekDays[] =
{

    "  Mon   ",
    " Tues   ",
    "  Wed   ",
    " Thurs  ",

    "  Fri   ",
    "  Sat   ",
    "  Sun   "
};


void
  setup() {
    pinMode(Pir,INPUT);
    pinMode(Screen,OUTPUT);
    display.begin();

    // initialize the RTC
    rtc.init();
    display.setContrast(60);

    display.clearDisplay();   // clears the screen and buffer
    display.drawRect(0,
  0, 84, 30, BLACK);
    display.drawRect(0, 29, 84, 12, BLACK);
    
}


void
  loop()
{
    if (digitalRead(Pir) == HIGH && State == false)  {
      digitalWrite(Screen,HIGH);

      State = true;
    }
    if (digitalRead(Pir) == LOW && State == true)
  {
      digitalWrite(Screen,LOW);
      State = false;
    }
    //
  get the current time
    Ds1302::DateTime now;
    rtc.getDateTime(&now);

    static uint8_t last_second = 0;
    if (last_second != now.second)
    {

        last_second = now.second;

        display.setTextColor(BLACK);

        display.setTextSize(2);
        display.setCursor(6,10);
        if
  (now.hour <= 9) { //If Hour is single figures, put a 0 in front
        display.print("0");

        }
        display.print(now.hour);
        display.print(":");

     if (now.minute <= 9) {  //If Minute is single figures, put a 0 in front

        display.print("0");
     }
        display.print(now.minute);

  //      display.print(":");
        display.setTextSize(1); 
        if
  (now.second <= 9) {  //If Seconds is single figures, put a 0 in front
        display.print("0");

     } 
        display.print(now.second);

        
        display.setCursor(0,31);

        display.print(WeekDays[now.dow -1]);
        display.print(now.day);

        display.print("/");
        display.print(now.month);
        

        display.display();

        
        display.setTextColor(WHITE);

        display.setCursor(0,31);
        display.print(WeekDays[now.dow -1]);

        display.print(now.day);
        display.print("/");
        display.print(now.month);
           
        
                
        
        display.setTextSize(2);

        display.setCursor(6,10);
     if (now.hour <= 9) {
        display.print("0");

    }
       display.print(now.hour);
       display.print(":");
     if
  (now.minute <= 9) {
       display.print("0");
  }
       display.print(now.minute);

  //     display.print(":");
       display.setTextSize(1);
     if (now.second
  <= 9) {
       display.print("0");
  } 
      display.print(now.second);

  
// No need to display the screen again
 
    }
  //  delay(100);

  LowPower.powerDown(SLEEP_250MS,ADC_OFF,BOD_OFF);
}

Downloadable files

Nokia Lcd Nano Rtc Pir

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