Added Lab 10

Lab10/MicroPython/Code/Thermostat01.py

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+import network
+import time
+from umqtt.simple import MQTTClient
+import secrets
+import dht
+from machine import Pin
+
+# ====== Globals ======
+tsetting = False
+last_tsetting = None
+temperatureSetting = 60
+
+# DHT11 setup (GP14)
+dht_sensor = dht.DHT11(Pin(14))
+furnaceRelay = machine.Pin('GP16', machine.Pin.OUT) #configure LED Pin as an output pin and create and led object for Pin class
+
+
+# ====== WiFi ======
+def connect_wifi():
+    wlan = network.WLAN(network.STA_IF)
+    wlan.active(True)
+    wlan.connect(secrets.WIFI_SSID, secrets.WIFI_PASSWORD)
+
+    print("Connecting to WiFi...")
+    while not wlan.isconnected():
+        time.sleep(1)
+
+    print("Connected:", wlan.ifconfig())
+
+# ====== MQTT Callback ======
+def message_callback(topic, msg):
+    global tsetting, last_tsetting,temperatureSetting
+    topic = topic.decode()
+    msg = msg.decode()
+
+    print("Received:", topic, msg)
+
+    if topic.endswith("/temperaturesetting"):
+        try:
+            value = int(msg)
+            print("temperaturesetting value::", value)
+            temperatureSetting = value
+            print("Temperature Setting == ",temperatureSetting)
+        except:
+            print("Invalid temperaturesetting value")
+
+    if topic.endswith("/led"):
+        print("LED command:", msg)
+
+# ====== MQTT Setup ======
+def connect_mqtt():
+    client_id = "picoW-client"
+    broker = "io.adafruit.com"
+    port = 1883
+
+    username = secrets.AIO_USERNAME
+    password = secrets.AIO_KEY
+
+    client = MQTTClient(client_id, broker, port=port,
+                        user=username, password=password)
+
+    client.set_callback(message_callback)
+    client.connect()
+
+    # Feed paths
+    base = secrets.AIO_USERNAME + "/feeds/"
+    temperaturesetting_feed = base + "temperaturesetting"
+    led_feed = base + "led"
+    humidity_feed = base + "humidity"
+    temperature_feed = base + "temperature"
+
+    # Subscribe
+    client.subscribe(temperaturesetting_feed)
+    client.subscribe(led_feed)
+
+    print("Subscribed to feeds")
+
+    return client, led_feed, humidity_feed, temperature_feed, temperaturesetting_feed
+
+# ====== Publish helpers ======
+def publish_led(client, led_feed, value):
+    msg = "ON" if value else "OFF"
+    client.publish(led_feed, msg)
+    print("Published LED:", msg)
+
+def publish_temp_humidity(client, humidity_feed, temperature_feed, humidity, temp_f):
+    client.publish(humidity_feed, str(humidity))
+    client.publish(temperature_feed, str(temp_f))
+
+    print("Published Humidity:", humidity)
+    print("Published Temp (F):", temp_f)
+
+# ====== Read DHT11 ======
+def read_dht():
+    try:
+        dht_sensor.measure()
+        temp_c = dht_sensor.temperature()
+        humidity = dht_sensor.humidity()
+
+        # Convert to Fahrenheit
+        temp_f = (temp_c * 9/5) + 32
+
+        return temp_f, humidity
+
+    except Exception as e:
+        print("DHT read error:", e)
+        return None, None
+
+# ====== Main ======
+def main():
+    global tsetting, last_tsetting,temperatureSetting, furnaceRelay
+
+    connect_wifi()
+    client, led_feed, humidity_feed, temperature_feed, temperaturesetting_feed = connect_mqtt()
+
+    last_dht_time = 0
+
+    while True:
+        client.check_msg()
+
+        # ---- Example toggle logic (replace with real input) ----
+#        if int(time.time()) % 10 == 0:
+#            tsetting = not tsetting
+
+        # ---- Publish LED state if changed ----
+#        if tsetting != last_tsetting:
+#            publish_led(client, led_feed, tsetting)
+#            last_tsetting = tsetting
+
+        # ---- Read DHT every 5 seconds ----
+        if time.time() - last_dht_time > 15:
+            temp_f, humidity = read_dht()
+
+            if temp_f is not None:
+                publish_temp_humidity(
+                    client,
+                    humidity_feed,
+                    temperature_feed,
+                    humidity,
+                    temp_f
+                )
+
+            last_dht_time = time.time()
+
+
+        if temperatureSetting > temp_f:
+            tsetting = True
+            furnaceRelay.value(True)
+        else:
+            tsetting = False
+            furnaceRelay.value(False)
+            
+        print("Temperature Setting = ",temperatureSetting)
+        publish_led(client, led_feed, tsetting)  
+
+
+        time.sleep(5)
+
+# Run
+main()