青青操国产在线观看,久久婷婷短片

本文來(lái)源電子發(fā)燒友社區(qū)，作者：soon順soon，帖子地址：https://bbs.elecfans.com/jishu_2010903_1_1.html

本文分享一種利用python搭建MQTT控制WIFI-IoT的紅綠燈測(cè)試web頁(yè)面的方法，實(shí)現(xiàn)按下 web頁(yè)面按鍵后會(huì)發(fā)布topic為ledstatus，payload分別為RedLED、YellowLED、GreenLED的消息，如果剛好有興趣的可以參考下。

WIFI-IoT上收到消息后反轉(zhuǎn)對(duì)應(yīng)LED 狀態(tài)的相關(guān)代碼,參閱

MQTT 控制紅綠燈的演示與代碼分享

一、相關(guān)的軟件和python庫(kù)安裝

ubuntu20.04中搭建MQTT Broker的指令如下

sudo apt-get install mosquitto
sudo apt-get install mosquitto-clients
sudo apt-get install mosquitto-dev

復(fù)制代碼

Ubuntu下用python搭建web會(huì)用到的庫(kù)安裝指令如下

pip3 install paho.mqtt
pip3 install web.py

復(fù)制代碼

如果是在windows下mqtt的包安裝要換成如下

pip install web.py
pip install paho-mqtt

復(fù)制代碼

二、用html寫個(gè)簡(jiǎn)單的頁(yè)面"key.html"如下

- Wifi-loT測(cè)試頁(yè)面
- Soon-Wifi-loT
tion="/RedLED" method="POST">

復(fù)制代碼

頁(yè)面比較簡(jiǎn)潔只有標(biāo)題和三個(gè)按鍵

三、Python相關(guān)代碼如下

import web
import paho.mqtt.client
import time
HOSTNAME ="xxxxxx"#請(qǐng)?zhí)钊肽愕腂roker地址/可以是你局域網(wǎng)ubuntu虛擬機(jī)IP，或者云服務(wù)器地址
MQTTPORT = 1883#默認(rèn)1883 具體看你Broker配置
USERNAME ="xxxxxx" #請(qǐng)?zhí)钊胗脩裘?/li>
PASSWD="xxxxxx"#請(qǐng)?zhí)钊胗妹艽a
HTML_PAGE = "key.html"
TOPICE = "ledstatus"
mqtt = paho.mqtt.client
urls = (
'/RedLED', 'RedLED',
'/YellowLED', 'YellowLED',
'/GreenLED', 'GreenLED',
'/(.*)', 'Wifi_lOT_home'
)
app = web.application(urls, globals())
client_id = time.strftime('%Y%m%d%H%M%S',time.localtime(time.time()))
client = mqtt.Client(client_id) # ClientId不能重復(fù)，所以使用當(dāng)前時(shí)間
# publish 消息
def on_publish(topic, payload, qos):
client.username_pw_set(USERNAME, PASSWD)# 必須設(shè)置，否則會(huì)返回「Connected with result code 4」
client.connect(HOSTNAME, MQTTPORT, 60)
client.publish(topic, payload, qos)
class Wifi_lOT_home:
def GET(self, name):
file = open(HTML_PAGE, "rb+")
return file.read()
def POST(self):
print ("test soon")
class RedLED:
def POST(self):
print ("RedLED POST")
on_publish(TOPICE, "RedLED".encode(),0)
file = open(HTML_PAGE, "rb+")
return file.read()
class YellowLED:
def POST(self):
print ("YellowLED POST")
on_publish(TOPICE,"YellowLED".encode(),0)
file = open(HTML_PAGE, "rb+")
return file.read()
class GreenLED:
def POST(self):
print ("GreenLED POST")
on_publish(TOPICE,"GreenLED".encode(),0)
file = open(HTML_PAGE, "rb+")
return file.read()
if __name__ == "__main__":
app.run()

復(fù)制代碼

四、運(yùn)行指令和效果
運(yùn)行指令python3 -u xxxxxx.py 端口，如 python3 -u keyEvent.py 8080
然后在瀏覽器輸入http://localhost:8080/或者h(yuǎn)ttp://（ubuntu IP/server IP）:8080/ 就能看到以下頁(yè)面

附相關(guān)代碼下載

聲明：本文內(nèi)容及配圖由入駐作者撰寫或者入駐合作網(wǎng)站授權(quán)轉(zhuǎn)載。文章觀點(diǎn)僅代表作者本人，不代表電子發(fā)燒友網(wǎng)立場(chǎng)。文章及其配圖僅供工程師學(xué)習(xí)之用，如有內(nèi)容侵權(quán)或者其他違規(guī)問題，請(qǐng)聯(lián)系本站處理。舉報(bào)投訴