import network
import time
from machine import Pin
import dht
from umqtt.simple import MQTTClient
# Setări MQTT
MQTT_CLIENT_ID = "micropython-weather-demo"
MQTT_BROKER = "broker.mqttdashboard.com"
MQTT_USER = ""
MQTT_PASSWORD = ""
MQTT_TOPIC_IN = "DataIN"
MQTT_TOPIC_OUT = "DataOut"
# WiFi connection
sta_if = network.WLAN(network.STA_IF)
sta_if.active(True)
sta_if.connect('Wokwi-GUEST', '')
while not sta_if.isconnected():
time.sleep(0.1)
print("Connected to WiFi")
# Init MQTT client
client = MQTTClient(MQTT_CLIENT_ID, MQTT_BROKER, user=MQTT_USER, password=MQTT_PASSWORD)
client.connect()
print("Connected to MQTT broker")
sensor = dht.DHT22(Pin(15))
pir_sensor = Pin(12, Pin.IN)
ledBlue = Pin(32, Pin.OUT)
ledGreen = Pin(33, Pin.OUT)
ledRed = Pin(25, Pin.OUT)
ledSwitch = Pin(16, Pin.OUT)
prev_message = ""
def data_callback(topic, msg):
print("Received data: {} on topic: {}".format(msg, topic))
def switch_callback(topic, msg):
print("Received message: {} on topic: {}".format(msg, topic))
if msg == b'1':
ledSwitch.value(1)
print("LED turned ON")
elif msg == b'0':
ledSwitch.value(0)
print("LED turned OFF")
client.set_callback(switch_callback)
client.subscribe(MQTT_TOPIC_OUT)
def send_sensor_data():
sensor.measure()
data = {
"temp": sensor.temperature(),
"humidity": sensor.humidity(),
"pir": pir_sensor.value()
}
numeric_values = [str(value) for value in data.values()]
message = ",".join(numeric_values)
print("Reportng data to MQTT topic {}: {}".format(MQTT_TOPIC_IN, message))
client.publish(MQTT_TOPIC_IN, message)
while True:
send_sensor_data()
if pir_sensor.value():
ledBlue.value(1)
time.sleep(1)
ledGreen.value(1)
time.sleep(1)
ledRed.value(1)
else:
ledBlue.value(0)
ledGreen.value(0)
ledRed.value(0)
client.check_msg()
time.sleep(1)