FM Radio with Clock Function

Clock radio using the RDA5807M and RTC DS1302

May 9, 2022

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Components and supplies

rtc ds1302 module

PAM8403 + Volume Control

SSD1306 OLED Display

Arduino Nano

RDA5807M FM Radio Module

Breadboard and hook up wire

Apps and platforms

Arduino IDE

Project description

Code

Clock Radio Final

arduino

1#include <Adafruit_SSD1306.h>
2#include <Wire.h>
3#include <RDA5807M.h>
4#include  <Arduino.h>
5#include <Ds1302.h>
6#include <LowPower.h>
7#include <SPI.h>
8#define  OLED_RESET -1
9#define FIX_BAND RADIO_BAND_FM   
10#define SCREEN_WIDTH 128 //  OLED display width, in pixels
11#define SCREEN_HEIGHT 32 // OLED display heightint  setButton = 9;
12Ds1302 rtc(8,6,7); // RST , CLK , DAT
13
14int dsplyButton =  11;
15int setButton = 9;
16int backButton = 10;
17int potPin = A0;
18
19
20float  displayStation;
21int stationNum, val;
22
23Adafruit_SSD1306 display(SCREEN_WIDTH,  SCREEN_HEIGHT, &Wire, -1);
24RDA5807M radio;
25
26// Select Your own radio frequencies  for your area
27int stations[10] = {9110,9370,9580,9670,9740,9890,10040,10540,10590,10760};
28const  static char* WeekDays[] =
29{
30    "Monday    ",
31    "Tuesday   ",
32    "Wednesday ",
33    "Thursday  ",
34    "Friday    ",
35    "Saturday  ",
36    "Sunday    "
37};
38const static char* MonthText[] =
39{
40    "Jan",
41    "Feb",
42    "Mar",
43    "Apr",
44    "May",
45    "Jun",
46    "Jul",
47    "Aug",
48    "Sep",
49    "Oct",
50    "Nov",
51    "Dec"
52};
53
54void setup() {
55
56  rtc.init();
57  pinMode(dsplyButton,INPUT_PULLUP);
58  pinMode(setButton,INPUT_PULLUP);
59  pinMode(backButton, INPUT_PULLUP);
60  display.begin(SSD1306_SWITCHCAPVCC,  0x3C); 
61  display.display();
62  delay(2000);
63  display.clearDisplay();
64    
65  radio.init();
66  radio.setBandFrequency(FIX_BAND, 9110);
67  radio.setVolume(8);
68  radio.setMono(false);
69  radio.setMute(false);
70  display.setTextSize(3);
71  display.setTextColor(WHITE);
72  display.setCursor(20,10);
73  display.print("91.10");
74  display.display();
75}
76
77void loop() {
78    radio.setVolume(8);
79    Ds1302::DateTime  now;
80    rtc.getDateTime(&now);
81    static uint8_t last_second = 0;
82  
83
84       if (last_second != now.second)
85    {
86        last_second = now.second;
87        display.setTextColor(SSD1306_WHITE);
88        display.setTextSize(1);
89        display.setCursor(40,0);
90        if (now.hour <= 9) { //If Hour is single  figures, put a 0 in front
91        display.print("0");
92        }
93        display.print(now.hour);
94        display.print(":");
95     if (now.minute <= 9) {  //If Minute is single  figures, put a 0 in front
96        display.print("0");
97     }
98        display.print(now.minute);
99        display.print(":"); 
100        if (now.second <= 9) {  //If Seconds is  single figures, put a 0 in front
101        display.print("0");
102     } 
103        display.print(now.second);
104
105        display.display();
106                       
107        display.setTextColor(SSD1306_BLACK);
108        display.setCursor(40,0);
109     if (now.hour <= 9) {
110        display.print("0");
111    }
112       display.print(now.hour);
113       display.print(":");
114     if (now.minute <= 9) {
115       display.print("0");
116  }
117       display.print(now.minute);
118       display.print(":");
119     if  (now.second <= 9) {
120       display.print("0");
121  } 
122      display.print(now.second);  
123  }
124
125    if (digitalRead(backButton)== LOW) {
126  
127    setFrequency();
128}
129if  (digitalRead(dsplyButton) == LOW) {
130
131  while (digitalRead(dsplyButton) ==  LOW) {
132    
133  }
134
135    radio.term();
136    DplyClock();
137
138}
139
140
141
142}
143void  setFrequency(){
144  display.setTextColor(SSD1306_WHITE);
145
146//  radio.setMute(false);
147  while(digitalRead(setButton) == HIGH){
148    display.setTextSize(1);
149    display.setTextColor(WHITE);
150    display.setCursor(0,0);
151    display.print("Select Station");
152    display.setTextSize(3);
153    display.setTextColor(WHITE);
154    display.setCursor(20,10);
155    val = analogRead(potPin);
156    stationNum = map(val, 0, 1023, 0, 9);
157    displayStation = stations[stationNum]/100.0;
158    display.print(displayStation);
159    display.display();
160    display.clearDisplay();
161  }
162  delay(500);
163  radio.setBandFrequency(FIX_BAND, stations[stationNum]);
164  display.setCursor(20,10);
165  display.print(displayStation);
166  display.display();
167}
168
169
170void  DplyClock() {
171
172
173    display.clearDisplay();
174    while (digitalRead(dsplyButton)  == HIGH) {
175  
176      // get the current time
177    Ds1302::DateTime now;
178    rtc.getDateTime(&now);
179    static uint8_t last_second = 0;
180    if (last_second  != now.second)
181    {
182        last_second = now.second;
183        display.setTextColor(SSD1306_WHITE);
184        display.setTextSize(2);
185        display.setCursor(15,2);
186        if  (now.hour <= 9) { //If Hour is single figures, put a 0 in front
187        display.print("0");
188        }
189        display.print(now.hour);
190        display.print(":");
191     if (now.minute <= 9) {  //If Minute is single figures, put a 0 in front
192        display.print("0");
193     }
194        display.print(now.minute);
195        display.print(":"); 
196        if (now.second <= 9) {  //If Seconds is  single figures, put a 0 in front
197        display.print("0");
198     } 
199        display.print(now.second);
200
201        display.setTextSize(1);
202        display.setCursor(17,22);
203        display.print(WeekDays[now.dow -1]);
204        display.print(now.day);
205        display.print(" ");
206        display.print(MonthText[now.month -1]);
207        
208        display.display();
209
210        
211        display.setTextColor(SSD1306_BLACK);
212        display.setCursor(17,22);
213        display.print(WeekDays[now.dow -1]);
214        display.print(now.day);
215        display.print(" ");
216        display.print(MonthText[now.month  -1]);           
217        
218                
219        
220        display.setTextSize(2);
221        display.setCursor(15,2);
222     if (now.hour <= 9) {
223        display.print("0");
224    }
225       display.print(now.hour);
226       display.print(":");
227     if  (now.minute <= 9) {
228       display.print("0");
229  }
230       display.print(now.minute);
231       display.print(":");
232     if (now.second <= 9) {
233       display.print("0");
234  } 
235      display.print(now.second);
236  
237}
238    LowPower.powerDown(SLEEP_250MS,ADC_OFF,BOD_OFF);  // Sleep for 250MS/Sec in Low Power
239}
240while (digitalRead(dsplyButton) ==  LOW){
241  }
242  display.setTextColor(SSD1306_WHITE);
243  radio.init();
244  radio.setBandFrequency(FIX_BAND,  stations[stationNum]);
245  display.clearDisplay();
246  display.setTextSize(3);
247  display.setCursor(20,10);
248  stationNum = map(val, 0, 1023, 0, 9);
249  displayStation  = stations[stationNum]/100.0;
250  display.print(displayStation);
251  display.display();
252}
253

#include <Adafruit_SSD1306.h>
#include <Wire.h>
#include <RDA5807M.h>
#include  <Arduino.h>
#include <Ds1302.h>
#include <LowPower.h>
#include <SPI.h>
#define  OLED_RESET -1
#define FIX_BAND RADIO_BAND_FM   
#define SCREEN_WIDTH 128 //  OLED display width, in pixels
#define SCREEN_HEIGHT 32 // OLED display heightint  setButton = 9;
Ds1302 rtc(8,6,7); // RST , CLK , DAT

int dsplyButton =  11;
int setButton = 9;
int backButton = 10;
int potPin = A0;


float  displayStation;
int stationNum, val;

Adafruit_SSD1306 display(SCREEN_WIDTH,  SCREEN_HEIGHT, &Wire, -1);
RDA5807M radio;

// Select Your own radio frequencies  for your area
int stations[10] = {9110,9370,9580,9670,9740,9890,10040,10540,10590,10760};
const  static char* WeekDays[] =
{
    "Monday    ",
    "Tuesday   ",
    "Wednesday ",
    "Thursday  ",
    "Friday    ",
    "Saturday  ",
    "Sunday    "
};
const static char* MonthText[] =
{
    "Jan",
    "Feb",
    "Mar",
    "Apr",
    "May",
    "Jun",
    "Jul",
    "Aug",
    "Sep",
    "Oct",
    "Nov",
    "Dec"
};

void setup() {

  rtc.init();
  pinMode(dsplyButton,INPUT_PULLUP);
  pinMode(setButton,INPUT_PULLUP);
  pinMode(backButton, INPUT_PULLUP);
  display.begin(SSD1306_SWITCHCAPVCC,  0x3C); 
  display.display();
  delay(2000);
  display.clearDisplay();
    
  radio.init();
  radio.setBandFrequency(FIX_BAND, 9110);
  radio.setVolume(8);
  radio.setMono(false);
  radio.setMute(false);
  display.setTextSize(3);
  display.setTextColor(WHITE);
  display.setCursor(20,10);
  display.print("91.10");
  display.display();
}

void loop() {
    radio.setVolume(8);
    Ds1302::DateTime  now;
    rtc.getDateTime(&now);
    static uint8_t last_second = 0;
  

       if (last_second != now.second)
    {
        last_second = now.second;
        display.setTextColor(SSD1306_WHITE);
        display.setTextSize(1);
        display.setCursor(40,0);
        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(":"); 
        if (now.second <= 9) {  //If Seconds is  single figures, put a 0 in front
        display.print("0");
     } 
        display.print(now.second);

        display.display();
                       
        display.setTextColor(SSD1306_BLACK);
        display.setCursor(40,0);
     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(":");
     if  (now.second <= 9) {
       display.print("0");
  } 
      display.print(now.second);  
  }

    if (digitalRead(backButton)== LOW) {
  
    setFrequency();
}
if  (digitalRead(dsplyButton) == LOW) {

  while (digitalRead(dsplyButton) ==  LOW) {
    
  }

    radio.term();
    DplyClock();

}



}
void  setFrequency(){
  display.setTextColor(SSD1306_WHITE);

//  radio.setMute(false);
  while(digitalRead(setButton) == HIGH){
    display.setTextSize(1);
    display.setTextColor(WHITE);
    display.setCursor(0,0);
    display.print("Select Station");
    display.setTextSize(3);
    display.setTextColor(WHITE);
    display.setCursor(20,10);
    val = analogRead(potPin);
    stationNum = map(val, 0, 1023, 0, 9);
    displayStation = stations[stationNum]/100.0;
    display.print(displayStation);
    display.display();
    display.clearDisplay();
  }
  delay(500);
  radio.setBandFrequency(FIX_BAND, stations[stationNum]);
  display.setCursor(20,10);
  display.print(displayStation);
  display.display();
}


void  DplyClock() {


    display.clearDisplay();
    while (digitalRead(dsplyButton)  == HIGH) {
  
      // 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(SSD1306_WHITE);
        display.setTextSize(2);
        display.setCursor(15,2);
        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(":"); 
        if (now.second <= 9) {  //If Seconds is  single figures, put a 0 in front
        display.print("0");
     } 
        display.print(now.second);

        display.setTextSize(1);
        display.setCursor(17,22);
        display.print(WeekDays[now.dow -1]);
        display.print(now.day);
        display.print(" ");
        display.print(MonthText[now.month -1]);
        
        display.display();

        
        display.setTextColor(SSD1306_BLACK);
        display.setCursor(17,22);
        display.print(WeekDays[now.dow -1]);
        display.print(now.day);
        display.print(" ");
        display.print(MonthText[now.month  -1]);           
        
                
        
        display.setTextSize(2);
        display.setCursor(15,2);
     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(":");
     if (now.second <= 9) {
       display.print("0");
  } 
      display.print(now.second);
  
}
    LowPower.powerDown(SLEEP_250MS,ADC_OFF,BOD_OFF);  // Sleep for 250MS/Sec in Low Power
}
while (digitalRead(dsplyButton) ==  LOW){
  }
  display.setTextColor(SSD1306_WHITE);
  radio.init();
  radio.setBandFrequency(FIX_BAND,  stations[stationNum]);
  display.clearDisplay();
  display.setTextSize(3);
  display.setCursor(20,10);
  stationNum = map(val, 0, 1023, 0, 9);
  displayStation  = stations[stationNum]/100.0;
  display.print(displayStation);
  display.display();
}

Downloadable files

Vero Schematic

Veroboard design. Make sure the data tracks are short to prevent cross track capacitance interference.

Vero Schematic

Clock Radio Wiring Diagram

Vero Schematic

Veroboard design. Make sure the data tracks are short to prevent cross track capacitance interference.

Vero Schematic

Documentation

Radio Fascia

3D Printer STL

Radio Fascia

Radio Housing

3D Printer STL

Radio Housing

Radio Fascia

3D Printer STL

Radio Fascia

Radio Housing

3D Printer STL

Radio Housing

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