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class-material/FakeSensors/Sensor de temperatura y humedad (DHT22)/readme.md

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+# Proyecto: Simulación de Sensor DHT22 en Wokwi con MQTT
+
+**Autor:** [Arias Verdin Vivian C20211692]  
+**Fecha:** [03/04/2025]  
+**Descripción:** Este proyecto simula un sensor de temperatura y humedad DHT22 en Wokwi y envía los datos a un servidor MQTT.
+
+---
+
+# Código Wokwi
+
+```python
+import time
+import network
+from umqtt.simple import MQTTClient
+import dht
+import machine
+
+# Configurar WiFi en Wokwi
+SSID = "Wokwi-GUEST"
+PASSWORD = ""
+
+wifi = network.WLAN(network.STA_IF)
+wifi.active(True)
+wifi.connect(SSID, PASSWORD)
+
+while not wifi.isconnected():
+    print("Conectando a WiFi...")
+    time.sleep(1)
+
+print("✅ WiFi Conectado. IP:", wifi.ifconfig()[0])
+
+# Configurar MQTT
+BROKER = "test.mosquitto.org"
+TOPIC = "fake/dht22"
+client = MQTTClient("esp32", BROKER)
+client.connect()
+
+# Configurar sensor DHT22
+dht_sensor = dht.DHT22(machine.Pin(4))
+
+# Bucle infinito para enviar datos cada 3 segundos
+while True:
+    try:
+        dht_sensor.measure()
+        temp = dht_sensor.temperature()
+        hum = dht_sensor.humidity()
+        payload = f"{{'temperature': {temp}, 'humidity': {hum}}}"
+        client.publish(TOPIC, payload)
+        print("📤 Enviado:", payload)
+    except Exception as e:
+        print("⚠️ Error al leer el sensor:", e)
+    time.sleep(3)
+```
+
+# Código de Visualización en Python
+
+```python
+import paho.mqtt.client as mqtt
+
+# Configuración de MQTT
+BROKER = "test.mosquitto.org"
+PORT = 1883
+TOPIC = "fake/dht22"
+
+def on_connect(client, userdata, flags, rc):
+    if rc == 0:
+        print("✅ Conectado correctamente")
+        client.subscribe(TOPIC)
+    else:
+        print(f"❌ Error de conexión: {rc}")
+
+def on_message(client, userdata, msg):
+    payload = msg.payload.decode()
+    print(f"📥 Recibido: {payload}")
+
+client = mqtt.Client()
+client.on_connect = on_connect
+client.on_message = on_message
+
+client.connect(BROKER, PORT)
+print("📡 Esperando datos...")
+client.loop_forever()
+```
+
+#screenshot
+![image](https://github.com/user-attachments/assets/575ed038-c5da-4640-9cb9-35c217fad97e)
+![image](https://github.com/user-attachments/assets/981be6d2-1005-4c4e-a87f-adb3f4ab0650)
+![image](https://github.com/user-attachments/assets/3933bdfa-7aee-46bc-ab27-a8e75ced8335)
+
+