嵌入式物联网在教育行业的应用——案例分析

#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <DHT.h>

#define DHTPIN 2
#define DHTTYPE DHT11

DHT dht(DHTPIN, DHTTYPE);
LiquidCrystal_I2C lcd(0x27, 16, 2);

int lightSensorPin = A0;

void setup() {
  dht.begin();
  lcd.begin();
  lcd.backlight();
}

void loop() {
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();
  int lightLevel = analogRead(lightSensorPin);

  lcd.setCursor(0, 0);
  lcd.print("Temp: ");
  lcd.print(temperature);
  lcd.print("C");
  
  lcd.setCursor(0, 1);
  lcd.print("Humidity: ");
  lcd.print(humidity);
  lcd.print("%");
  
  delay(2000);
  
  lcd.setCursor(0, 0);
  lcd.print("Light: ");
  lcd.print(lightLevel);
  
  delay(2000);
}

import pandas as pd
from sklearn.model_selection import train_test_split
from sklearn.linear_model import LinearRegression
from sklearn.metrics import mean_squared_error

# 读取数据
data = pd.read_csv('student_data.csv')

# 数据预处理
X = data[['study_time', 'homework_done']]
y = data['exam_score']

# 分割数据集
X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.2, random_state=42)

# 训练模型
model = LinearRegression()
model.fit(X_train, y_train)

# 预测
y_pred = model.predict(X_test)

# 评估模型
mse = mean_squared_error(y_test, y_pred)
print(f'Mean Squared Error: {mse}')

# 个性化学习建议
def learning_suggestion(study_time, homework_done):
    predicted_score = model.predict([[study_time, homework_done]])[0]
    if predicted_score < 60:
        return "需要更多的学习时间和完成作业。"
    elif predicted_score < 80:
        return "表现良好，但可以提高作业完成率。"
    else:
        return "继续保持良好的学习习惯！"

# 示例
suggestion = learning_suggestion(5, 1)
print(f'学习建议: {suggestion}')

import cv2

# 初始化摄像头
cap = cv2.VideoCapture(0)

while True:
    ret, frame = cap.read()
    if not ret:
        break
    
    # 显示视频流
    cv2.imshow('Campus Security', frame)
    
    # 按下'q'键退出
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

# 释放摄像头
cap.release()
cv2.destroyAllWindows()

#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <MPU6050.h>

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define OLED_RESET -1
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

MPU6050 mpu;

void setup() {
  Wire.begin();
  mpu.initialize();
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
  display.display();
  delay(2000);
  display.clearDisplay();
}

void loop() {
  int16_t ax, ay, az;
  mpu.getAcceleration(&ax, &ay, &az);

  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(0, 0);
  display.print("Accel: ");
  display.print("X=");
  display.print(ax);
  display.print(" Y=");
  display.print(ay);
  display.print(" Z=");
  display.print(az);
  display.display();
  
  delay(500);
}