Send/Receive SMS with STM32F103C8 and SIM800C GSM Module

Embedded

hi i copie your code in aurdino ide and i'm geeting this error "PB11 bot declared inside this scope". pls help me solve t his error. Thanks

#include <LiquidCrystal.h> //Library for LCD display

const int rs = PB11, en = PB10, d4 = PB0, d5 = PB1, d6 = PC13, d7 = PC14; //Pins that are connected between LCD and STM32

LiquidCrystal lcd(rs, en, d4, d5, d6, d7);

int receive = 0;

void setup()

{



lcd.begin(16,2); //LCD set at 16x2 mode



pinMode(PA0,INPUT); //Push buttons as INPUT pins

pinMode(PA1,INPUT);



lcd.print("STM32 WITH GSM"); //Display Welcome message

lcd.setCursor(0,1);

lcd.print("SIM800C");



Serial1.begin(9600); // Setting the baud rate of GSM Module

delay(1000);

lcd.clear();

}

void loop()

{

lcd.clear();

lcd.setCursor(0,0);

lcd.print("S to Send sms");

lcd.setCursor(0,1);

lcd.print("R to Receive sms");

delay(100);





int a = digitalRead(PA0); //Read status of the push buttons

int b = digitalRead(PA1);



if (a == 1) // Depeding upon which push button is pressed the respected function is called

{

SendMessage();

}

else if( b == 1)

{

RecieveMessage();

}

}

void SendMessage() //Function to Send Message

{

lcd.clear();



lcd.print("Sending sms");

delay(1000);

Serial1.println("AT+CMGF=1"); //Sets the GSM Module in Text Mode

delay(1000);

Serial1.println("AT+CMGS=\"+91XXXXXXXXXX\"\r"); // Replace x with mobile number

delay(1000);

Serial1.println("Hi Circuit Digest from GSM Module"); // The SMS text you want to send

delay(100);

Serial1.println((char)26);// ASCII code of CTRL+Z

delay(1000);

lcd.clear();

lcd.print("SMS SENT");

delay(1000);

}

void RecieveMessage() //Function to Receive Message

{

lcd.clear();

lcd.print("Receiving sms");

Serial1.println("AT+CNMI=2,2,0,0,0"); // AT Command to recieve a live SMS

delay(1000);

while(1)

{

if(Serial1.available())

{

do

{