Which required popular Radio module called RDA5807M.
The RDA5807M series support frequency range is from 50MHz to 115MHz.
Easily available in the market
i simply find this module in MP3 players available in the market ,
this modules is without 32khz crystal, you need to placed this crystal on the IC 6 pin & to the ground
You must have Libraries like -------Wire.h ---- TEA5767Radio.h ------- LiquidCrystal.h
Here in Code TEA5767Radio were used , it will support RDA5807M Chip.
Also remember these two pins must be proper
* Arduino Pin A5 = Radio Chip Pin SDA
* Arduino Pin A4 = Radio Chip Pin SCL
1 ----> Arduino SDA
2 ----> Arduino SCL
3 ----> GND
5 ----> +5V
6 ----> GND
7 ----> Audio out (right channel)
8 ----> Audio out (left channel)
10 ---> Antenna
* LCD RS pin to digital pin 12
* LCD Enable pin to digital pin 11
* LCD D4 pin to digital pin 5
* LCD D5 pin to digital pin 4
* LCD D6 pin to digital pin 3
* LCD D7 pin to digital pin 2
* LCD R/W pin to ground
* Arduino SDA PIN A5
* Arduino SCL PIN A4
* ends to +5V and ground
* UP SEARCH (A0)
* DOWN SEARCH (A1)
-----------------------------------------------------------------
#include <Wire.h>
#include <TEA5767Radio.h>
#include <LiquidCrystal.h>
TEA5767Radio radio = TEA5767Radio();
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
float frequency = 0;
int fUP = A0;
int fDOWN = A1;
int count = 0;
void setup()
{
delay(1000);
Wire.begin();
frequency = 96.0; //starting frequency
radio.setFrequency(frequency);
lcd.begin(16,2);
lcd.clear();
lcd.setCursor(0,0);
lcd.print("FM: ");
lcd.setCursor(0, 1);
lcd.print(frequency);
}
void loop()
{
if(digitalRead(fUP))
{
count=0;
while (digitalRead(fUP))
{
count++;
if(count > 0 && count <= 6)
{
frequency += 0.1;
frequencyUpdate();
delay(200);
}
else if (count > 6 && count <= 2)
{
frequency += 0.1;
frequencyUpdate();
delay(80);
}
else
{
frequency += 0.1;
frequencyUpdate();
delay(5);
}
}
}
if(digitalRead(fDOWN))
{
count = 0;
while (digitalRead(fDOWN))
{
count--;
if(count < 0 && count >= -6)
{
frequency -= 0.1;
frequencyUpdate();
delay(200);
}
else if (count < -6 && count >= -12)
{
frequency -= 0.1;
frequencyUpdate();
delay(80);
}
else
{
frequency -= 0.1;
frequencyUpdate();
delay(5);
}
}
}
}
void frequencyUpdate() //this function changes the frequency of the station, is called by preset and frequency up/down conditions.
{
frequency = constrain(frequency, 50.0, 115.0); //50MHz to 115MHz.
lcd.setCursor(0,0);
lcd.print("KSF FM:");
lcd.setCursor(0,1);
lcd.print(frequency);
radio.setFrequency(frequency);
}
