برقراری ارتباط بین ماژول 433 مگاهرتزی RF با برد STM32F103C8

				
					Transmitter code (STM32F103C8):

//433MHZ RF Trasmitter with STM32F103C8

//Transmitter Code

//Circuit Digest

#include <RH_ASK.h>                             //RadioHead library

#define trigPin PB1                             //Sets the Trigpin of Ultrasonic sensor as PB1

#define echoPin PB0                             //Sets the echoPin of Ultrasonic sensor as PB0

RH_ASK rf_driver(2000, PA9, PA10);              //Sets Pin PA9 as receiver and PA10 as transmitterand 2000 as Speed

String transmit_pwm;                            //Strings to store string value

String transmit_distance;

String transmit;

void setup()

{

    // Initialize ASK Object

    rf_driver.init();

    Serial.begin(9600);

    pinMode(PA0,INPUT);

    pinMode(echoPin,INPUT);

    pinMode(trigPin,OUTPUT);

}

void loop()

{

    int analoginput = analogRead(PA0);                    // ADC value from pin PA0 connected to Potentiometer

    int pwmvalue = map(analoginput,0,4096,0,100);         // Converts 0 to 4096 into 0 to 100

    digitalWrite(trigPin, LOW);                           //Makes TrigPin of Ultrasonic LOW

    delayMicroseconds(2);

    digitalWrite(trigPin, HIGH);                          //Makes TrigPin of Ultrasonic HIGH

    delayMicroseconds(10);

    digitalWrite(trigPin, LOW);                           //Makes TrigPin of Ultrasonic LOW

    long duration = pulseIn(echoPin, HIGH);               //Receives the Echo signal reflected

    float distance= duration*0.034/2;                     //Calculates distance in CM of object

    transmit_pwm = String(pwmvalue);                      //Convert value into string

    transmit_distance = String(distance);                 //Convert value into string

    transmit = transmit_pwm + "," + transmit_distance;    //Adds two String in one line

    const char *msg = transmit.c_str();                   //

    rf_driver.send((uint8_t *)msg, strlen(msg));          //Sends the String

    rf_driver.waitPacketSent();         

    Serial.println(msg);                                  //Serial Print value for debug

    delay(1000);

}

Receiver Code (Arduino UNO):

//Receiver Arduino Code

//433MHZ RF with STM32F103C8 as Transmitter

//Circuit Digest

#include <RH_ASK.h>                 //Includes RadioHead Library

#include <LiquidCrystal.h>          //Includes the LCD display Library 

LiquidCrystal lcd(2,3,4,5,6,7);     //Initialize lcd with Pins connected to Arduino

String str_receive;                 //Strings to Store Value

String str_number;

String str_distance;

RH_ASK rf;                          //rf as object for RG_ASK

void setup()

{

    lcd.begin(16,2);               //Lcd set as 16x2 Mode

    lcd.print("CIRCUIT DIGEST");   //Display Welcome message

    lcd.setCursor(0,1);

    lcd.print("RF with STM32");

    delay(5000);

    lcd.clear();

    rf.init();                     //Initialize rf Object

}

void loop()

{

    uint8_t buf[7];                       

    uint8_t buflen = sizeof(buf);

    if (rf.recv(buf, &buflen))                                  

    {

      str_receive = String((char*)buf);                          // Receive String from the Transmitter

      for (int i = 0; i < str_receive.length(); i++)             // Split string into two string

      {

      if (str_receive.substring(i, i+1) == ",")                 

      {

      str_number = str_receive.substring(0, i);

      str_distance = str_receive.substring(i+1);

      break;

      }

    }

      char numberstring[4];

      char distancestring[3];

      str_distance.toCharArray(distancestring,3);              //Convert String into Char Array

      str_number.toCharArray(numberstring,3);

      int distance = atoi(distancestring);                    //Convery Array into integer value

      int number = atoi(numberstring);

      lcd.setCursor(0,0);

      lcd.print("Number:");

      lcd.print(number);                                     //Display number value at LCD display

      lcd.setCursor(0,1);

      lcd.print("Distance :");

      lcd.print(distance);                                   //Display distance value at LCD display

      lcd.print(" cm");

      delay(1500);

      lcd.clear();

}

}