📡 IoT ואוטומציה למהנדסים

// Arduino - DHT22 example
#include <DHT.h>
#define DHTPIN 2
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Serial.begin(9600);
  dht.begin();
}

void loop() {
  float t = dht.readTemperature();
  if (!isnan(t)) {
    Serial.println(t);
  }
  delay(1000);
}

pip install pyserial matplotlib

import serial
import matplotlib.pyplot as plt
import matplotlib.animation as animation

SERIAL_PORT = 'COM3'  # שנה לפי המערכת
BAUD_RATE = 9600

ser = serial.Serial(SERIAL_PORT, BAUD_RATE, timeout=1)
plt.ion()
fig, ax = plt.subplots()
xs, ys = [], []

def update(frame):
    if ser.in_waiting:
        try:
            line = ser.readline().decode().strip()
            temp = float(line)
            ys.append(temp)
            xs.append(len(ys))
            if len(ys) > 100:
                ys.pop(0)
                xs.pop(0)
            ax.clear()
            ax.plot(xs, ys)
            ax.set_ylim(0, 50)
        except:
            pass

ani = animation.FuncAnimation(fig, update, interval=500)
plt.show()