# Complete project details at https://RandomNerdTutorials.com
#* ESP32 HTTP IoT Server Example for Wokwi.com
# https://wokwi.com/projects/320964045035274834
# To test, you need the Wokwi IoT Gateway, as explained here:
#https://docs.wokwi.com/guides/esp32-wifi#the-private-gateway
# Then start the simulation, and open http://localhost:9080
# in another browser tab.
# Note that the IoT Gateway requires a Wokwi Club subscription.
# To purchase a Wokwi Club subscription, go to https://wokwi.com/club
def read_sensor():
global temp, hum
temp = hum = 0
try:
sensor.measure()
temp = sensor.temperature()
hum = sensor.humidity()
if (isinstance(temp, float) and isinstance(hum, float)) or (isinstance(temp, int) and isinstance(hum, int)):
msg = (b'{0:3.1f},{1:3.1f}'.format(temp, hum))
# uncomment for Fahrenheit
#temp = temp * (9/5) + 32.0
hum = round(hum, 2)
return(msg)
else:
return('Invalid sensor readings.')
except OSError as e:
return('Failed to read sensor.')
def web_page():
html = """<!DOCTYPE HTML><html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.7.2/css/all.css" integrity="sha384-fnmOCqbTlWIlj8LyTjo7mOUStjsKC4pOpQbqyi7RrhN7udi9RwhKkMHpvLbHG9Sr" crossorigin="anonymous">
<style>
html {
font-family: Arial;
display: inline-block;
margin: 0px auto;
text-align: center;
}
h2 { font-size: 3.0rem; }
p { font-size: 3.0rem; }
.units { font-size: 1.2rem; }
.dht-labels{
font-size: 1.5rem;
vertical-align:middle;
padding-bottom: 15px;
}
</style>
</head>
<body>
<h2>ESP DHT Server</h2>
<p>
<i class="fas fa-thermometer-half" style="color:#059e8a;"></i>
<span class="dht-labels">Temperature</span>
<span>"""+str(temp)+"""</span>
<sup class="units">°C</sup>
</p>
<p>
<i class="fas fa-tint" style="color:#00add6;"></i>
<span class="dht-labels">Humidity</span>
<span>"""+str(hum)+"""</span>
<sup class="units">%</sup>
</p>
</body>
</html>"""
return html
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind(('', 80))
s.listen(5)
while True:
conn, addr = s.accept()
print('Got a connection from %s' % str(addr))
request = conn.recv(1024)
print('Content = %s' % str(request))
sensor_readings = read_sensor()
print(sensor_readings)
response = web_page()
conn.send('HTTP/1.1 200 OK\n')
conn.send('Content-Type: text/html\n')
conn.send('Connection: close\n\n')
conn.sendall(response)
conn.close()