MicroPython ESP32网页实时更新DHT11数据显示

news2024/9/24 1:26:57

MicroPython ESP32网页实时更新DHT11数据显示

📌相关篇《MicroPython ESP32 读取DHT11温湿度传感器数据》
📍《【Micropython esp32/8266】网页点灯控制示例》

✨本例综合以上两篇文章内容实现：在本地网页中显示DHT11温度传感器数据。可以做到在线监测湿度度数据变化。

✨本示例基于Thonny平台下开发。✨
🎉固件版本：esp32-20220618-v1.19.1应该也兼容最新的版本。
🌼效果如下：
📖工程架构

⛳注意事项

🚩运行程序前，DHT11传感器必须已经接到指定定义的引脚上了，否则运行会报错！！！
🧲在boot.py为文件中需要修改成个人的WiFi信息。
🎯本地路由器设置不能开启AP隔离功能，否则设备与设备直接无法正常访问。
🔰设备端和访问端必须在同一个网络环境下。
🏳‍🌈不支持5G网络。

步骤

在这里插入图片描述

📘代码实现

boot.py

# This file is executed on every boot (including wake-boot from deepsleep)
#import esp
#esp.osdebug(None)
#import uos, machine
#uos.dupterm(None, 1) # disable REPL on UART(0)
#import gc
#import webrepl
#webrepl.start()
#gc.collect()

try:
  import usocket as socket
except:
  import socket

from machine import Pin
import network

import esp
esp.osdebug(None)

import gc
gc.collect()
# wifi信息
ssid = 'MERCURY_D268G'	# 填写自己的WiFi信息
password = 'pba5ayzk'	# 填写自己的WiFi信息

station = network.WLAN(network.STA_IF)

station.active(True)
station.connect(ssid, password)

while station.isconnected() == False:
  pass

print('Connection successful')
print(station.ifconfig())

led = Pin(2, Pin.OUT)

📑main.py

import dht
import machine

d = dht.DHT11(machine.Pin(4))
d.measure()
t=d.temperature() # eg. 23 (°C)
h=d.humidity()    # eg. 41 (% RH)
def web_page():
    
  html = """<html><head>
    <meta http-equiv="refresh" content="3">
    <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="icon" href="data:,"><style>body { text-align: center; font-family: "Trebuchet MS", Arial;}
  table { border-collapse: collapse; width:45%; margin-left:auto; margin-right:auto;}
  th { padding: 12px; background-color: #0043af; color: white; }
  tr { border: 1px solid #ddd; padding: 12px; }
  tr:hover { background-color: #bcbcbc; }
  td { border: none; padding: 12px; }
  .sensor { color:red; font-weight: bold; background-color: #bcbcbc; padding: 1px;
  </style></head><body><h1>ESP Web DHT11 DATA</h1>
  <table><tr><th>MEASUREMENT</th><th>VALUE</th></tr>
  <tr><td>Temperature</td><td><span class="sensor">""" + str(t) + """</span></td></tr>
  <tr><td>Humidity</td><td><span class="sensor">""" + str(h) + """</span></td></tr></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()
    conn.settimeout(3.0)
    print('Got a connection from %s' % str(addr))
    request = conn.recv(1024)
    request = str(request)
    print('Content = %s' % request)

    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()