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	if(htim == &htim6)//bate
	{
		if(battery <= 14 && battery > 0)
		{

		    battery -= 1;
			sprintf(msg,"current battery : %d\r\n",battery);
			HAL_UART_Transmit(&huart3,(uint8_t*)msg,strlen(msg),HAL_MAX_DELAY);
			if(battery >= 12)
			{
				HAL_GPIO_WritePin(GPIOA,GPIO_PIN_6,SET);
				HAL_UART_Transmit(&huart3,tx1,sizeof(tx1),HAL_MAX_DELAY);
			}
			else if(battery < 12 && battery >= 10)
			{
				HAL_GPIO_WritePin(GPIOA,GPIO_PIN_13,SET);
				HAL_UART_Transmit(&huart3,tx2,sizeof(tx2),HAL_MAX_DELAY);
			}
			else if(battery <= 7 && battery > 10)
			{
				HAL_GPIO_WritePin(GPIOA,GPIO_PIN_2,SET);
				HAL_UART_Transmit(&huart3,tx4,sizeof(tx4),HAL_MAX_DELAY);
			}
            			else if(battery < 7 && z!=1)
			{
				HAL_UART_Transmit(&huart3,tx6,sizeof(tx6),HAL_MAX_DELAY);


				if(HAL_UART_Receive(&huart3,&ch,sizeof(ch),HAL_MAX_DELAY)==HAL_OK)
				{
					switch(ch)
					{
					case 'R':
						HAL_UART_Transmit(&huart3,tx7,sizeof(tx7),HAL_MAX_DELAY);
						battery = 13;
						break;
					case 'P':
						HAL_UART_Transmit(&huart3,tx8,sizeof(tx8),HAL_MAX_DELAY);
						battery = 12;
						break;
					case 'N':
						HAL_UART_Transmit(&huart3,tx9,sizeof(tx9),HAL_MAX_DELAY);
						z=1;


					}



				}
			}
		}


	}