barzik/main.py

## main.py
import network
import socket
import machine
import ujson
import utime

SSID = 'NAME'
PASSWORD = 'PASSWORD'

def connect_to_wifi(ssid, password):
    wlan = network.WLAN(network.STA_IF)
    wlan.active(True)

    if not wlan.isconnected():
        print('Connecting to WiFi...')
        wlan.connect(ssid, password)
        while not wlan.isconnected():
            pass
    print('Network config:', wlan.ifconfig())

def read_mq135():
    adc = machine.ADC(machine.Pin(36))
    adc.atten(machine.ADC.ATTN_11DB)  # Set 11dB attenuation for readings up to approx. 3.3V
    return adc.read()

def handle_request(cl_file):
    request = cl_file.readline().decode('utf-8')
    while True:
        line = cl_file.readline()
        if not line or line == b'\r\n':
            break

    if "GET /sensors" in request:
        mq135_value = read_mq135()
        data = {
            "id": "mq-135",
            "label": "Gas sensor",
            "value": mq135_value
        }
        response = ujson.dumps(data)
        headers = 'HTTP/1.0 200 OK\r\nContent-type: application/json\r\nAccess-Control-Allow-Origin: *\r\n\r\n'
        return headers + response

    elif "GET /" in request:
        html = """
        <html>
            <head>
                <title>MQ-135 Sensor Data</title>
                <script>
                    function fetchData() {
                        fetch('/sensors')
                        .then(response => response.json())
                        .then(data => {
                            document.getElementById("sensorData").innerText = JSON.stringify(data, null, 4);
                            document.getElementById("sensorMeter").value = data.value;
                        });
                    }
                    setInterval(fetchData, 5000); // Fetch data every 5 seconds
                </script>
            </head>
            <body onload="fetchData()">
                <h1>MQ-135 Sensor Data:</h1>
                <meter id="sensorMeter" min="0" max="4000" low="50" high="500" optimum="200"></meter>
                <pre id="sensorData"></pre>
            </body>
        </html>
        """
        headers = 'HTTP/1.0 200 OK\r\nContent-type: text/html\r\n\r\n'
        return headers + html

    else:
        return 'HTTP/1.0 404 Not Found\r\nContent-type: text/plain\r\n\r\n404: Not Found'

def start_web_server():
    addr = socket.getaddrinfo('0.0.0.0', 80)[0][-1]
    s = socket.socket()
    s.bind(addr)
    s.listen(1)

    print('Listening on', addr)

    while True:
        cl, addr = s.accept()
        print('Client connected from', addr)
        cl_file = cl.makefile('rwb', 0)
        response = handle_request(cl_file)
        cl.send(response)
        utime.sleep(0.5)  # Add a small delay
        cl.close()

connect_to_wifi(SSID, PASSWORD)
start_web_server()
	import network
	import socket
	import machine
	import ujson
	import utime

	SSID = 'NAME'
	PASSWORD = 'PASSWORD'

	def connect_to_wifi(ssid, password):
	wlan = network.WLAN(network.STA_IF)
	wlan.active(True)

	if not wlan.isconnected():
	print('Connecting to WiFi...')
	wlan.connect(ssid, password)
	while not wlan.isconnected():
	pass
	print('Network config:', wlan.ifconfig())

	def read_mq135():
	adc = machine.ADC(machine.Pin(36))
	adc.atten(machine.ADC.ATTN_11DB) # Set 11dB attenuation for readings up to approx. 3.3V
	return adc.read()

	def handle_request(cl_file):
	request = cl_file.readline().decode('utf-8')
	while True:
	line = cl_file.readline()
	if not line or line == b'\r\n':
	break

	if "GET /sensors" in request:
	mq135_value = read_mq135()
	data = {
	"id": "mq-135",
	"label": "Gas sensor",
	"value": mq135_value
	}
	response = ujson.dumps(data)
	headers = 'HTTP/1.0 200 OK\r\nContent-type: application/json\r\nAccess-Control-Allow-Origin: *\r\n\r\n'
	return headers + response

	elif "GET /" in request:
	html = """
	<html>
	<head>
	<title>MQ-135 Sensor Data</title>
	<script>
	function fetchData() {
	fetch('/sensors')
	.then(response => response.json())
	.then(data => {
	document.getElementById("sensorData").innerText = JSON.stringify(data, null, 4);
	document.getElementById("sensorMeter").value = data.value;
	});
	}
	setInterval(fetchData, 5000); // Fetch data every 5 seconds
	</script>
	</head>
	<body onload="fetchData()">
	<h1>MQ-135 Sensor Data:</h1>
	<meter id="sensorMeter" min="0" max="4000" low="50" high="500" optimum="200"></meter>
	<pre id="sensorData"></pre>
	</body>
	</html>
	"""
	headers = 'HTTP/1.0 200 OK\r\nContent-type: text/html\r\n\r\n'
	return headers + html

	else:
	return 'HTTP/1.0 404 Not Found\r\nContent-type: text/plain\r\n\r\n404: Not Found'

	def start_web_server():
	addr = socket.getaddrinfo('0.0.0.0', 80)[0][-1]
	s = socket.socket()
	s.bind(addr)
	s.listen(1)

	print('Listening on', addr)

	while True:
	cl, addr = s.accept()
	print('Client connected from', addr)
	cl_file = cl.makefile('rwb', 0)
	response = handle_request(cl_file)
	cl.send(response)
	utime.sleep(0.5) # Add a small delay
	cl.close()

	connect_to_wifi(SSID, PASSWORD)
	start_web_server()