import time
import adafruit_dht
import board
import RPi.GPIO as GPIO
import http.server
import threading
import json
sensor = adafruit_dht.DHT11(board.D31)
LED_PIN = 40
FAN_PIN = 15
#stel GPIO in (ik hoop dat het werkt. ik kan het niet testen)
GPIO.setmode(GPIO.BCM)
GPIO.setup(LED_PIN, GPIO.OUT)
GPIO.setup(FAN_PIN, GPIO.OUT)
#array voor sensor data
sensor_data = {
'tempc': 0.0,
'tempf': 0.0,
'humidity': 0.0,
'led': False,
'fan': False
}
fan_timer_start = 0
fan_timer_actief = False
def check_data():
global fan_timer_actief, fan_timer_start
while True:
try:
temperatuur_C = sensor.temperature
temperatuur_F = temperatuur_C * (9/5) + 32
humidity = sensor.humidity
sensor_data['tempc'] = temperatuur_C
sensor_data['tempf'] = temperatuur_F
sensor_data['humidity'] = humidity
except RuntimeError as err:
print(err.args[0])
# zet fan en led aan als temperatuur hoger is dan 20 C
if temperatuur_C > 20:
GPIO.output(LED_PIN, GPIO.HIGH)
GPIO.output(FAN_PIN, GPIO.HIGH)
sensor_data['led'] = True
sensor_data['fan'] = True
fan_timer_actief = False
fan_timer_start = 0
else:
if sensor_data['fan'] == True and fan_timer_actief == False:
fan_timer_actief = True
fan_timer_start = time.time()
sensor_data['fan'] = True
sensor_data['led'] = False
GPIO.output(FAN_PIN, GPIO.HIGH)
GPIO.output(LED_PIN, GPIO.LOW)
elif sensor_data['fan'] == True and fan_timer_actief == True and time.time() - fan_timer_start > 300: # 5 minuten
fan_timer_actief = False
fan_timer_start = 0
sensor_data['fan'] = False
sensor_data['led'] = False
GPIO.output(FAN_PIN, GPIO.LOW)
GPIO.output(LED_PIN, GPIO.LOW)
else:
fan_timer_actief = False
fan_timer_start = 0
sensor_data['fan'] = False
sensor_data['led'] = False
GPIO.output(FAN_PIN, GPIO.LOW)
GPIO.output(LED_PIN, GPIO.LOW)
class handler_class(http.server.BaseHTTPRequestHandler):
def do_GET (self):
if self.path == '/':
#headers
self.send_response(200)
self.send_header('Content-type', 'text/html; charset=utf-8')
self.end_headers()
#html website
website = """
IOT DHT11 sensor status
IOT DHT11 Sensor Status
Temp_C = --C
Temp_F = --F
humidity = --%
LED = UIT
FAN = UIT
"""
self.wfile.write(website.encode())
elif self.path == '/data':
self.send_response(200)
self.send_header('Content-type', 'application/json')
self.end_headers()
self.wfile.write(json.dumps(sensor_data).encode())
def web_server():
#web server port en IP binding
web_binding = ('', 8000)
server = http.server.HTTPServer(web_binding, handler_class)
print ("server draait op port 8000")
server.serve_forever()
if __name__ == '__main__':
threading.Thread(target=web_server, daemon=True).start()
threading.Thread(target=check_data, daemon=True).start()
while True:
time.sleep(1)