دائرة راديو بسيط

العناصر المطلوبة

طريقة توصيل الـ Radio Module

توصيل الدائرة

البرمجة بلغة الأردوينو

//Libraries:
        #include <TEA5767.h>
            #include <Wire.h>

//Constants:
                TEA5767 Radio; //Pinout SLC and SDA - Arduino uno pins A5 and A4

//Variables:
                double old_frequency;
                double frequency;
                int search_mode = 0;
                int search_direction;
                unsigned long last_pressed;
                unsigned char buf[5];
                int stereo;
                int signal_level;
                double current_freq;
                unsigned long current_millis = millis();
                int inByte;
                int flag=0;

void setup () {
                //Init
                Serial.begin(9600);
                Radio.init();
                Radio.set_frequency(98.9); //On power on go to station 98.9

}

void loop () {

if (Serial.available()>0) {
                inByte = Serial.read();
                if (inByte == '+' || inByte == '-' ){  //accept only + and - from keyboard
                flag=0;
                }
                }

if (Radio.read_status(buf) == 1) {
                current_freq =  floor (Radio.frequency_available (buf) / 100000 + .5) / 10;
                stereo = Radio.stereo(buf);
                signal_level = Radio.signal_level(buf);
                //By using flag variable the message will be printed only one time.
                if(flag == 0){
                Serial.print("Current freq: ");
                Serial.print(current_freq);
                Serial.print("MHz Signal: ");
                //Strereo or mono ?
                if (stereo){
                Serial.print("STEREO ");
                }
                else{
                Serial.print("MONO ");
                }
                Serial.print(signal_level);
                Serial.println("/15");
                flag=1;
                }
                }
                //When button pressed, search for new station
                  if (search_mode == 1) {
                      if (Radio.process_search (buf, search_direction) == 1) {
                          search_mode = 0;
                      }
                  }
                  //If forward button is pressed, go up to next station
                  if (inByte == '+') {
                    last_pressed = current_millis;
                    search_mode = 1;
                    search_direction = TEA5767_SEARCH_DIR_UP;
                    Radio.search_up(buf);
                  }
                  //If backward button is pressed, go down to next station
                  if (inByte == '-') {
                    last_pressed = current_millis;
                    search_mode = 1;
                    search_direction = TEA5767_SEARCH_DIR_DOWN;
                    Radio.search_down(buf);
                  } 
                  delay(500);  
                }