problem with sim800

hi, I wrote a code for an SMS controlled irrigation system. it has three modes: manual mode which can turn a Solenoid valve on and off with an SMS, semi-auto which can turn a solenoid valve on for a specific duration and turn it off using an SMS. and automatic mode which can for example turn a solenoid valve on for an hour every day at a specific time for instance 5 am. I have no problem with the first two modes. but I encountered a problem with the third mode. I need to use a gsm clock for this mode and I wrote a function for testing that extracts the time after we send a message to sim800 and texts back the time. I want to use this time to compare it to 5. when I use this function in my code nothing works and I can't turn the LED on with SMS. when I delete this function the code works fine. what is the problem here?

my compiler is Keil and I use stm32f103ret6.and the function that I have a problem with it is send_clock. 

 

/**
  ******************************************************************************
  * File Name          : main.c
  * Description        : Main program body
  ******************************************************************************
  *
  * COPYRIGHT(c) 2020 STMicroelectronics
  *
  * Redistribution and use in source and binary forms, with or without modification,
  * are permitted provided that the following conditions are met:
  *   1. Redistributions of source code must retain the above copyright notice,
  *      this list of conditions and the following disclaimer.
  *   2. Redistributions in binary form must reproduce the above copyright notice,
  *      this list of conditions and the following disclaimer in the documentation
  *      and/or other materials provided with the distribution.
  *   3. Neither the name of STMicroelectronics nor the names of its contributors
  *      may be used to endorse or promote products derived from this software
  *      without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  ******************************************************************************
  */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "stm32f1xx_hal.h"

/* USER CODE BEGIN Includes */
#include <string.h>
#include <stdio.h>  
#include <stdlib.h>
unsigned char E[]={10},C[]={13},G[]={34},S[]={26};
#define Enter    HAL_UART_Transmit(&huart1,(unsigned char*)E,1,10);
#define CR       HAL_UART_Transmit(&huart1,(unsigned char*)C,1,10);
#define GIM      HAL_UART_Transmit(&huart1,(unsigned char*)G,1,10);
#define SUB      HAL_UART_Transmit(&huart1,(unsigned char*)S,1,10);
#define LED      HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_0)

/* USER CODE END Includes */

/* Private variables ---------------------------------------------------------*/
TIM_HandleTypeDef htim3;

UART_HandleTypeDef huart1;

/* USER CODE BEGIN PV */
/* Private variables ---------------------------------------------------------*/
UART_HandleTypeDef huart1;
char str_tmp[50];
char buffer;
char m1[2];
int sec=0;
int b=0 ;
/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
void Error_Handler(void);
static void MX_GPIO_Init(void);
static void MX_USART1_UART_Init(void);
static void MX_TIM3_Init(void);

/* USER CODE BEGIN PFP */
/* Private function prototypes -----------------------------------------------*/
void uart1_puts(char *str);
void Send_State(void);
void CMGF_1(void);
char get_char(void);
void wait_to_get(char ch);
void del_All_SMS(void);
void cmti(void) ;
void cmgr(void);
void Send_SMS(char *text);

//****************************************************
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
{
	if (htim->Instance==TIM3)
	{
	sec++;
	GPIOB->BSRR=(1<<16);	
	if (sec==10)
	{
		GPIOB->BSRR=0x1;
		sec=0;
	}		
	else if (sec==5 && b==1)
	{ 
		GPIOB->BSRR=0x1;
		sec=0;
	}
}	


}
void uart1_puts(char *str)    
{
while (*str!=0)
{
	HAL_UART_Transmit(&huart1,(unsigned char*)str,1,10);
	str++;
}
 } 
//**********************

 
 //*******************************************************
 
 //*******************************************************************************
 void auto1(uint32_t x,uint32_t y)
 {
	 HAL_Delay(y);
	GPIOB->BSRR=0x01;
	HAL_Delay(x);
	GPIOB->BSRR=(1<<16);
	 
 }	 
 
 
 
 
//******************************************************** 
 void CMGF_1(void)
 {
	str_tmp[0]='\0';
	HAL_Delay(100);       
	strcpy(str_tmp,"AT+CMGF=1");
	HAL_Delay(500);       
	uart1_puts(str_tmp);
	Enter
	CR	
	
 }
//******************************************************** 
 char get_char(void)
{
 char cha[1];
 HAL_UART_Receive(&huart1,(unsigned char *)cha,1,200000);
 return cha[0];
}
//********************************************************
 void wait_to_get(char ch) {
 char Rch[1];
 while(ch != Rch[0]){
	HAL_UART_Receive(&huart1,(unsigned char *)Rch,1,200000);
 }
 }
 
 //********************************************************
 void del_All_SMS(void)
 {
 strcpy(str_tmp,"AT+CMGDA=");
 HAL_Delay(500);       
 uart1_puts(str_tmp);
 GIM
 str_tmp[0]='\0';
 HAL_Delay(500);       

 strcpy(str_tmp,"DEL ALL");
 HAL_Delay(500);       
 uart1_puts(str_tmp);
 GIM    //AT+CMGDA="del all"
 Enter
 CR
 HAL_Delay(500);       
 str_tmp[0]='\0';
 }
//*********************************************************
void cmti(void) {
 wait_to_get(','); 
 uart1_puts("AT+CMGR=1");
 Enter
 CR	
 }
//*********************************************************
 void Send_State(void)
{
CMGF_1(); 
HAL_Delay(500);       
str_tmp[0]='\0';
HAL_Delay(100);       

strcpy(str_tmp,"AT+CMGS=");
HAL_Delay(500);       
uart1_puts(str_tmp);
GIM
str_tmp[0]='\0';
HAL_Delay(100);       

strcpy(str_tmp,"09154866346");
HAL_Delay(500);       
uart1_puts(str_tmp);
GIM
Enter
CR

HAL_Delay(500);           

if(LED==1)// send State
{
 uart1_puts("LED is on");
}  
else
{
 uart1_puts("LED is off");
}   
Enter
CR
str_tmp[0]='\0';
HAL_Delay(500);       
SUB

HAL_Delay(5000);
del_All_SMS();
}
//*********************************************************
void Send_SMS(char *text)
{
CMGF_1(); 
HAL_Delay(500);       
str_tmp[0]='\0';
HAL_Delay(100);       

strcpy(str_tmp,"AT+CMGS=");
HAL_Delay(500);       
uart1_puts(str_tmp);
GIM
str_tmp[0]='\0';
HAL_Delay(100);       

strcpy(str_tmp,"09154866346");
HAL_Delay(500);       
uart1_puts(str_tmp);
GIM
Enter
CR

HAL_Delay(500);           

 uart1_puts(text);

Enter
CR
str_tmp[0]='\0';
HAL_Delay(500);       
SUB

HAL_Delay(2000);
del_All_SMS();
}
//************************************************
void send_clock(void) {

 int y,z,m,j;
 
 char chert[19]={0};
 char date[22]={0};
 char buffer2[50];
 char new_date[30]={0};
 wait_to_get(',');
for(y=0;y<19;y++)
 {
   chert[y]=get_char(); 
 } 
 for (z=0;z<22;z++)
 {
	date[z]=get_char(); 
	 
 }

	 Send_SMS(date);
 

// strcpy(str_tmp,"AT+CCLK=");
// HAL_Delay(500);       
// uart1_puts(str_tmp);
// GIM
// str_tmp[0]='\0';
// HAL_Delay(500);       

// strcpy(str_tmp,date);
// HAL_Delay(500);       
// uart1_puts(str_tmp);
// GIM    //AT+CMGDA="del all"
// Enter
// CR
//        
// str_tmp[0]='\0';
// uart1_puts("AT+CCLK?");
// Enter
// CR
// HAL_Delay(500);
// for (j=0;j<30;j++)
// {
//	new_date[j]=get_char(); 
// }
// Send_SMS(new_date);
 }


 //**************************************************
void cmgr(void) {

 int x;
 
 char message[2]={0};

 
 	 wait_to_get(E[0]);
 
for(x=0;x<2;x++)
 {
   message[x]=get_char(); 
 } 
				    
					
		if(strcmp(message,"on")==0)
		{
		      
				GPIOB->BSRR=0x1;
				del_All_SMS();
		}
		else if(strcmp(message,"of")==0)
		{
				GPIOB->BSRR=(1<<16);
				del_All_SMS();
		}
		else if(strcmp(message,"st")==0)
		{
			Send_State();
			del_All_SMS();
		}	
  				
	else if (strcmp(message,"s1")==0)
	{
	 auto1(1000,2000);
		del_All_SMS();
	}
	else if (strcmp(message,"s2")==0)
	{
		auto1(1000,5000);
		del_All_SMS();
	}
	else if (strcmp(message,"s3")==0)
	{
	auto1(1000,10000);	
		del_All_SMS();
	}
	else if (strcmp(message,"at")==0)
	{
		HAL_TIM_Base_Start_IT(&htim3);
		del_All_SMS();
		b=0;
	}
	else if (strcmp(message,"mn")==0)
	{
	HAL_TIM_Base_Stop_IT(&htim3);
		del_All_SMS();
	}
	else if (strcmp(message,"a2")==0)
	{
   	b=1;
		del_All_SMS();
	}
//	else if (strcmp(message,"ck")==0)
//	{
//		send_clock();
//		del_All_SMS();
//	}
}

/* USER CODE END PFP */

/* USER CODE BEGIN 0 */

/* USER CODE END 0 */

int main(void)
{

  /* USER CODE BEGIN 1 */

  /* USER CODE END 1 */

  /* MCU Configuration----------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* Configure the system clock */
  SystemClock_Config();

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_USART1_UART_Init();
  MX_TIM3_Init();

  /* USER CODE BEGIN 2 */
CMGF_1();
	del_All_SMS();
	
  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
	
  while (1)
  {

		
		buffer=get_char();
		if(buffer=='+') 
		{ 
			buffer=get_char(); 
			if(buffer=='C') { 
				buffer=get_char(); 
				if(buffer=='M') { 
					buffer=get_char(); 
					if(buffer=='T') {			
						buffer=get_char();
						if(buffer=='I') {	
							buffer=get_char();
							if(buffer==':')	
								cmti();
								}
				  	} 
					else if(buffer=='G') { 
						buffer=get_char(); 
							if(buffer=='R') {
								buffer=get_char(); 
								if(buffer==':')	
								
								cmgr();
								
								send_clock();
								
  /* USER CODE END WHILE */

  /* USER CODE BEGIN 3 */

  							}
}
}
				}
			}
		}
	}
  /* USER CODE END 3 */



/** System Clock Configuration
*/
void SystemClock_Config(void)
{

  RCC_OscInitTypeDef RCC_OscInitStruct;
  RCC_ClkInitTypeDef RCC_ClkInitStruct;

    /**Initializes the CPU, AHB and APB busses clocks 
    */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.HSICalibrationValue = 16;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }

    /**Initializes the CPU, AHB and APB busses clocks 
    */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
  {
    Error_Handler();
  }

    /**Configure the Systick interrupt time 
    */
  HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);

    /**Configure the Systick 
    */
  HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);

  /* SysTick_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
}

/* TIM3 init function */
static void MX_TIM3_Init(void)
{

  TIM_ClockConfigTypeDef sClockSourceConfig;
  TIM_MasterConfigTypeDef sMasterConfig;

  htim3.Instance = TIM3;
  htim3.Init.Prescaler = 7999;
  htim3.Init.CounterMode = TIM_COUNTERMODE_UP;
  htim3.Init.Period = 999;
  htim3.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
  if (HAL_TIM_Base_Init(&htim3) != HAL_OK)
  {
    Error_Handler();
  }

  sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
  if (HAL_TIM_ConfigClockSource(&htim3, &sClockSourceConfig) != HAL_OK)
  {
    Error_Handler();
  }

  sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
  sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
  if (HAL_TIMEx_MasterConfigSynchronization(&htim3, &sMasterConfig) != HAL_OK)
  {
    Error_Handler();
  }

}

/* USART1 init function */
static void MX_USART1_UART_Init(void)
{

  huart1.Instance = USART1;
  huart1.Init.BaudRate = 115200;
  huart1.Init.WordLength = UART_WORDLENGTH_8B;
  huart1.Init.StopBits = UART_STOPBITS_1;
  huart1.Init.Parity = UART_PARITY_NONE;
  huart1.Init.Mode = UART_MODE_TX_RX;
  huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  huart1.Init.OverSampling = UART_OVERSAMPLING_16;
  if (HAL_UART_Init(&huart1) != HAL_OK)
  {
    Error_Handler();
  }

}

/** Configure pins as 
        * Analog 
        * Input 
        * Output
        * EVENT_OUT
        * EXTI
*/
static void MX_GPIO_Init(void)
{

  GPIO_InitTypeDef GPIO_InitStruct;

  /* GPIO Ports Clock Enable */
  __HAL_RCC_GPIOB_CLK_ENABLE();
  __HAL_RCC_GPIOA_CLK_ENABLE();

  /*Configure GPIO pin Output Level */
  HAL_GPIO_WritePin(GPIOB, GPIO_PIN_0, GPIO_PIN_RESET);

  /*Configure GPIO pin : PB0 */
  GPIO_InitStruct.Pin = GPIO_PIN_0;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

}

/* USER CODE BEGIN 4 */

/* USER CODE END 4 */

/**
  * @brief  This function is executed in case of error occurrence.
  * @param  None
  * @retval None
  */
void Error_Handler(void)
{
  /* USER CODE BEGIN Error_Handler */
  /* User can add his own implementation to report the HAL error return state */
  while(1) 
  {
  }
  /* USER CODE END Error_Handler */ 
}

#ifdef USE_FULL_ASSERT

/**
   * @brief Reports the name of the source file and the source line number
   * where the assert_param error has occurred.
   * @param file: pointer to the source file name
   * @param line: assert_param error line source number
   * @retval None
   */
void assert_failed(uint8_t* file, uint32_t line)
{
  /* USER CODE BEGIN 6 */
  /* User can add his own implementation to report the file name and line number,
    ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
  /* USER CODE END 6 */

}

#endif

/**
  * @}
  */ 

/**
  * @}
*/ 

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

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