Added simple webserver
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# ESP32 Webserver
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This project makes use of the ESP32's wifi capabilities and the `usocket` library to respond to a simple get request and return and HTML response.
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import esp
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import gc
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import network
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esp.osdebug(None)
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gc.collect()
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def connect():
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sta_if = network.WLAN(network.STA_IF)
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if not sta_if.isconnected():
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print("connecting to wireless network....")
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sta_if.active(True)
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sta_if.connect(b"Candy", b"whatisdelicious")
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while not sta_if.isconnected():
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pass
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print("network config:", sta_if.ifconfig())
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# def no_debug():
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# import esp
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# esp.osdebug(None)
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connect()
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from webserver import render_html, http_respond
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SENSOR_DATA = {
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"cel": 22,
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"fahr": 71.6,
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"light": 90,
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"hum": 35,
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}
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def report():
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"""Mock function to return sensor data"""
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return SENSOR_DATA
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while True:
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context = report()
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html = render_html(context)
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http_respond(html)
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import gc
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try:
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import usocket as socket
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except ImportError:
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import socket
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s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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s.bind(('', 80))
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s.listen(5)
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def render_html(context: dict = {}):
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html = """<html><head><meta name="viewport" content="width=device-width, initial-scale=1">
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<link rel="icon" href="data:,"><style>body { text-align: center; font-family: "Trebuchet MS", Arial;}
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table { border-collapse: collapse; width:35%; margin-left:auto; margin-right:auto; }
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th { padding: 12px; background-color: #0043af; color: white; }
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tr { border: 1px solid #ddd; padding: 12px; }
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tr:hover { background-color: #bcbcbc; }
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td { border: none; padding: 12px; }
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.sensor { color:white; font-weight: bold; background-color: #bcbcbc; padding: 1px;
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</style></head><body><h1>ESP32 Sensor Output</h1>
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<table><tr><th>MEASUREMENT</th><th>VALUE</th></tr>
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<tr><td>Temp. Celsius</td><td><span class="sensor">""" + str(context.get('cel')) + """</span></td></tr>
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<tr><td>Temp. Fahrenheit</td><td><span class="sensor">""" + str(context.get('fahr')) + """F</span></td></tr>
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<tr><td>Light</td><td><span class="sensor">""" + str(context.get('light')) + """%</span></td></tr>
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<tr><td>Humidity</td><td><span class="sensor">""" + str(context.get('hum')) + """%</span></td></tr></body></html>"""
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return html
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def http_respond(html: str):
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try:
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if gc.mem_free() < 102000:
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gc.collect()
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conn, addr = s.accept()
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conn.settimeout(3.0)
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print('Got a connection from: {addr}'.format(addr=addr))
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request = conn.recv(1024)
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conn.settimeout(None)
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request = str(request)
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print('Content = {}'.format(request))
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conn.send('HTTP/1.1 200 OK\n')
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conn.send('Content-Type: text/html\n')
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conn.send('Connection: close\n\n')
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conn.sendall(html)
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conn.close()
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except OSError as err:
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conn.close()
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print('Connection closed')
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