代码实现用nbiot和stm32发送数据1234和接受数据1234

这里给出一个简单的示例代码，使用NB-IoT模块和STM32微控制器发送和接收数据。

#include "stm32f10x.h"
#include "stdio.h"

#define AT_CMD_DELAY_MS 500

void USART1_Init(void);
void USART1_SendChar(char ch);
void USART1_SendString(char* str);
void delay_ms(uint32_t ms);
void NB_IoT_Init(void);
void NB_IoT_SendData(char* data);
void NB_IoT_ReceiveData(void);

int main(void)
{
    char data_to_send[] = "1234";
    
    USART1_Init();
    NB_IoT_Init();
    
    while(1)
    {
        // Send data
        NB_IoT_SendData(data_to_send);
        delay_ms(AT_CMD_DELAY_MS);
        
        // Receive data
        NB_IoT_ReceiveData();
        delay_ms(AT_CMD_DELAY_MS);
    }
}

void USART1_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    USART_InitTypeDef USART_InitStructure;

    // Enable GPIOA clock
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

    // Enable USART1 clock
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);

    // Configure USART1 Tx (PA9) as alternate function push-pull
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    // Configure USART1 Rx (PA10) as input floating
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    // Configure USART1 parameters
    USART_InitStructure.USART_BaudRate = 9600;
    USART_InitStructure.USART_WordLength = USART_WordLength_8b;
    USART_InitStructure.USART_StopBits = USART_StopBits_1;
    USART_InitStructure.USART_Parity = USART_Parity_No;
    USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
    USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
    USART_Init(USART1, &USART_InitStructure);

    // Enable USART1
    USART_Cmd(USART1, ENABLE);
}

void USART1_SendChar(char ch)
{
    while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET);
    USART_SendData(USART1, ch);
}

void USART1_SendString(char* str)
{
    while(*str)
    {
        USART1_SendChar(*str);
        str++;
    }
}

void delay_ms(uint32_t ms)
{
    uint32_t i;
    for(i=0; i<ms*1000; i++);
}

void NB_IoT_Init(void)
{
    // Configure NB-IoT module
    // ...
}

void NB_IoT_SendData(char* data)
{
    USART1_SendString("AT+NSOST=0.0.0.0,5684,");
    USART1_SendString(data);
    USART1_SendString("\r\n");
}

void NB_IoT_ReceiveData(void)
{
    USART1_SendString("AT+NSORF=0,20\r\n");
    
    // Wait for response from NB-IoT module
    // ...
    
    // Read received data from NB-IoT module
    // ...
}

其中，`USART1_Init()`函数初始化了STM32的USART1串口，用于与NB-IoT模块通信。`NB_IoT_Init()`函数初始化了NB-IoT模块。`NB_IoT_SendData()`函数发送数据到NB-IoT模块，`NB_IoT_ReceiveData()`函数接收数据从NB-IoT模块。

需要根据具体的NB-IoT模块和STM32微控制器进行修改和调整。