STM32 Project Share: Bathroom Monitoring System

We do not engage in one-time transactions; we aim to be long-term partners in technical growth!

01

—

Physical Video Demonstration

See the end of the article for data sharing

02

—

Project Overview

DHT11 for monitoring temperature and humidity

Ultrasonic sensor to monitor the distance of individuals in the bathroom

SIM900A is the SMS module for sending messages

The ultrasonic distance measuring module monitors individuals in the bathroom. If there are unstable changes in the monitored distance during the monitoring process,

it will not trigger an alarm: when an individual in the bathroom falls and is injured, the monitored data will remain unchanged, triggering an alarm and sending an SMS to a designated phone using the GSM device. The temperature and humidity will be displayed on the OLED.

03

—

Schematic Design

04

—

PCB Hardware Design

05

—

Program Design

#include "stm32f10x.h"                  // Device header
#include "delay.h"
#include "lcd.h"
#include "sim900a.h"
#include "usart.h"
#include "IOput.h"
#include "dht11.h"
#include "wave.h"
extern char dispbuf[64];
// Wiring/**************************************************
1. Connect the microcontroller to the corresponding power supply
   Microcontroller PB10 --- Module 3VR
   Microcontroller PB11 --- Module 3VT
   Microcontroller GND  --- Module GND
   Microcontroller 5V   --- Module VCC_
2. Power the module separately
   Module VCC (or VCC5V) connects to DC5V
   Module GND connects to power ground
*****************************************************/
u8 show_flag,show1_flag,max_wd=30,dec_wd=20,max_sd=60,dec_sd=40,distance,mode_flag,tance=0,count,shuaidao=0,message_flag=0;
int main (void){
	char English_message[]={"Fall detected!!"};                             // English SMS content
	char phonenumber[]={"17780467539"};                             // Phone number to receive SMS
	char Chinese_message[]={"4F60597D"};                            // Chinese SMS content corresponding to 你好
	char Unicode_phonenumber[]={"00310038003700360031003000370036003300300032"};
	delay_init();
	NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
	Usart1_Init(115200);                           // Serial port 1 for printing information
	Usart3_Init(38400);                             // Serial port 3 for driving SIM900A
	OLED_Init();
	delay_ms(1);
	OLED_Clear();
	DHT11_Init();
	CH_SR04_Init();
	input_init();
//	sim900a_send_English_message(English_message,phonenumber);
	while(1) {
//		Usart_SendString2(USART1,"AT\r\n"); 
		distance=Senor_Using();
		DHT11_Read_Data(&temp,&humi);
		key_scan(0,0,0);
		OLED_ShowCH(0,0,"  Bathroom Monitoring System  ");
		OLED_ShowCH(0,2,"Temperature:");
		OLED_ShowNum(40,2,temp,2,16);
		OLED_ShowCH(64,2,"Humidity:");
		OLED_ShowNum(104,2,humi,2,16);
		OLED_ShowCH(0,4,"Distance:");
		OLED_ShowNum(40,4,distance,2,16);
		if(set_flag==1) {
			set_flag=0;
			mode_flag++;
			if(mode_flag>=2)
				mode_flag=0;
		}
		if(mode_flag==0) {
			OLED_ShowCH(64,4,"Not Monitoring");
		} else {
			OLED_ShowCH(64,4,"Monitoring On");
			if(distance==tance) {
				count++;
				if(count>=100) {
					count=0;
					shuaidao++;
				}
				if(shuaidao>=5) {
					OLED_ShowCH(0,6,"   Fall Detected  ");
					shuaidao=0;
					message_flag=1;
				}
			} else {
				OLED_ShowCH(0,6,"   All Normal  ");
				message_flag=0;
				shuaidao=0;
				count=0;
				tance=distance;
			}
		}
		if(message_flag==1) {
			message_flag=0;
			sim900a_send_English_message(English_message,phonenumber);
		}
	}
}

06

—

Data Sharing

Baidu Cloud link:

https://pan.baidu.com/s/1u4QvCEuRuH3GATOxDiABfg?pwd=rydr Extraction code: rydr

If the link is invalid, please click on the public account to contact us!