STM32 Project Share: Smart Home Appliance Control System

Project Finished Product Image:

Bilibili Video Link:

https://www.bilibili.com/video/BV1hZBBYwEHb/?share_source=copy_web&vd_source=097fdeaf6b6ecfed8a9ff7119c32faf2

(See end of article for resource sharing)

01

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Project Introduction

1. Function Details

STM32 Smart Home Appliance Control System

Functions are as follows:

1. STM32F103C8T6 microcontroller board as the main control unit

2. Display function: Real-time display of temperature and humidity data on OLED screen

3. Automatic control: Determine if temperature and humidity are within threshold range, otherwise sound the buzzer alarm

4. Threshold adjustment: Threshold values can be adjusted using buttons

5. Remote control: Control lights, fans, and curtains remotely via the Gizwits Cloud APP

6. Remote monitoring: The Gizwits Cloud APP can remotely monitor environmental temperature and humidity data

2. Bill of Materials

• STM32F103C8T6 Microcontroller

• OLED Screen

• DHT11 Temperature and Humidity Sensor

• ESP8266-01S WiFi Module

• Relay

• High Power LED Module

• Fan Module

• Stepper Motor

02

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Schematic Design

03

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PCB Hardware Design

PCB Diagram

04

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Program Design

#include "stm32f10x.h"                  // Device header#include "gizwits_product.h"#include "oled.h"#include "menu.h"#include "dht11.h"#include "motor.h"#include "key.h"#include "buzzer.h"#include "flash.h"#include "usart.h"#include "sys.h"#include "usb.h"#include "tim3.h"#include "tim2.h"#include "iwdg.h"
#define FLASH_START_ADDR 0x0801f000 // Starting address for writing
u8 Menu = 1; // Menu variable
u8 SetNum = 1;
u8 Temp_value; // Temperature threshold variable
u8 Humi_value; // Humidity threshold variable
int main(void) {
    NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
    OLED_Init();
    DHT11_UserConfig();
    MOTOR_UserConfig();
    Key_Init();
    USB_Init();
    Buzzer_Init();
    Temp_value = FLASH_R(FLASH_START_ADDR); // Read from specified page address in FLASH
    Humi_value = FLASH_R(FLASH_START_ADDR + 2); // Read from specified page address in FLASH
    Timer2_Init(9, 14398);
    uart2_init(9600);
    uart1_init(115200);
    GENERAL_TIM_Init();
    userInit(); // Complete initial assignment
    gizwitsInit();
    IWDG_Init();
    while (1) {
        IWDG_ReloadCounter(); // Reload counter value to feed the watchdog
        switch(Menu) {
            case 1:
                Menu1(); // Display menu 1
                /* Check if motor start flag is 1 */
                if(Curtain_ON_Flag == 1) {
                    MOTOR_Direction_Angle(1, 0, 180, 1); // Clockwise motor rotation 180 degrees
                    MOTOR_STOP(); // Motor stop
                    Curtain_ON_Flag = 0;
                }
                /* Check if motor stop flag is 1 */
                if(Curtain_OFF_Flag == 1) {
                    MOTOR_Direction_Angle(0, 0, 180, 1); // Counterclockwise motor rotation 180 degrees
                    MOTOR_STOP(); // Motor stop
                    Curtain_OFF_Flag = 0;
                }
                break;
            case 2:
                OLED_Clear(); // Clear screen
                Menu2(); // Display menu 2
                Menu = 3;
            case 3:
                OLED_Option(SetNum); // Display current selection position
                OLED_ShowNum(2, 10, Temp_value, 2); // Display temperature threshold data
                OLED_ShowNum(3, 10, Humi_value, 2); // Display humidity threshold data
                /* Count the number of times button 1 is pressed */
                if(KeyNum == 1) {
                    KeyNum = 0;
                    SetNum++;
                    if(SetNum > 2) {
                        SetNum = 1;
                    }
                }
                /* When position points to temperature threshold, adjust value based on button 3 or 4 */
                if(SetNum == 1) {
                    if(KeyNum == 3) {
                        KeyNum = 0;
                        Temp_value++;
                        if(Temp_value >= 100) {
                            Temp_value = 0;
                        }
                    }
                    if(KeyNum == 4) {
                        KeyNum = 0;
                        Temp_value--;
                        if(Temp_value >= 100) {
                            Temp_value = 99;
                        }
                    }
                }
                /* When position points to humidity threshold, adjust value based on button 3 or 4 */
                if(SetNum == 2) {
                    if(KeyNum == 3) {
                        KeyNum = 0;
                        Humi_value++;
                        if(Humi_value >= 100) {
                            Humi_value = 0;
                        }
                    }
                    if(KeyNum == 4) {
                        KeyNum = 0;
                        Humi_value--;
                        if(Humi_value >= 100) {
                            Humi_value = 99;
                        }
                    }
                }
                /* When button 2 is pressed, return to main menu */
                if(KeyNum == 2) {
                    KeyNum = 0;
                    /* Store the changed threshold values in Flash */
                    FLASH_W(FLASH_START_ADDR, Temp_value, Humi_value);
                    OLED_Clear(); // Clear screen
                    Menu = 1; // Display menu 1
                }
                break;
            default: break;
        }
        userHandle();
        gizwitsHandle((dataPoint_t *)&currentDataPoint);
    }
}

05

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Experimental Results

Resource Sharing (Baidu Cloud)

https://pan.baidu.com/s/1SyRMEeWhjiycDIb8y7RWoA?pwd=uep1 Extraction Code: uep1

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