Arduino+W5100+新浪云SAE（开发语言：Python）+微信公众平台（实现LED控制）

阅读本博客之前，建议先参考博客：微信客户端+微信公众平台+新浪云SAE+Arduino+WS100(控制LED)

不同之处：主要是服务器使用的语言，本博客使用的是Python

一、硬件部分

1） Arduino、W5100

连接图如下：



硬件这边是我遇到的坑，记录下来

a. 控制LED灯的pin脚：

很多教程里都选择了Pin 13， 但是我购买的板中，Pin13是一个复用引脚，当Arduino和W5100板连接的时候，pin13被占用了，无法通过pin13来控制LED的开关。因此我更换了pin9

外接一个LED灯， 参考图如下：



b. Ethernet.begin()连接网络的方式：

根据library资料有五种连接方式:https://www.arduino.cc/en/Reference/EthernetBegin

Ethernet.begin(mac);
Ethernet.begin(mac, ip);
Ethernet.begin(mac, ip, dns);
Ethernet.begin(mac, ip, dns, gateway);
Ethernet.begin(mac, ip, dns, gateway, subnet);

当时忽略了一个问题，arduino库1.0后，支持DHCP模式，所以我再测试的时候，不需要手动设置IP，直接的连接方式如下：Ethernet.begin(mac);

2）Arduino设备程序烧录

Arduino IDE

https://www.arduino.cc/en/Main/Software

Arduino代码

#include "Arduino.h"
#include <SPI.h>
#include <Ethernet.h>

char state = '0';
char c;
byte mac[] = {
0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED};

EthernetClient client;
// arduino1.applinzi.com是我自己的服务器，你们需要更换成自己的
char server[] = "arduino1.applinzi.com";
int sensrdata = 50;

unsigned long lastConnectionTime = 0;
boolean lastConnected = false;
// 设置一个时间间隔，10秒请求一次
const unsigned long postingInterval = 10*1000;

void setup()
{
// Add your initialization code here
Serial.begin(9600);
delay(1000);
Ethernet.begin(mac);
Serial.print("My IP address: ");
Serial.println(Ethernet.localIP());
pinMode(9, OUTPUT);
}

// The loop function is called in an endless loop
void loop()
{
//Add your repeated code here
while(client.available()) {
state = client.read();
if(state == '{'){               //关灯    0
Serial.println(state);
digitalWrite(9, LOW);
delay(3000);
}else if(state == '}'){       //开灯    1
Serial.println(state);
digitalWrite(9, HIGH);
delay(3000);
}
}

if (!client.connected() && lastConnected) {
Serial.println("disconnecting 2.");
client.stop();
}

if(!client.connected() && (millis() - lastConnectionTime > postingInterval)) {
if (client.connect(server, 80)) {

Serial.println("connecting");
// sen
c977
d the HTTP PUT request:
client.println("GET / HTTP/1.1");
client.println("Host: arduino1.applinzi.com");
//          client.println("User-Agent: arduino-ethernet");
client.println("Connection: close");
client.println();

lastConnectionTime = millis();
}else {
Serial.println("connection failed");
Serial.println("disconnecting 1.");
client.stop();
}
}
lastConnected = client.connected();
}

二、服务器部分

服务器应用：



数据库设计：





列出部分代码，详细代码见Github：https://github.com/shfscut/Arduino

index.wsgi代码

import os

import sae
import web
from handle import Handle

urls = (
'/', 'Handle'
)

app_root = os.path.dirname(__file__)
templates_root = os.path.join(app_root, 'templates')
render = web.template.render(templates_root)

app = web.application(urls, globals()).wsgifunc()

application = sae.create_wsgi_app(app)

handle.py代码

# -*- coding: utf-8 -*-
# filename: handle.py

import hashlib
import web
import reply
import receive
import sae.const
import MySQLdb

class Handle(object):
def GET(self):
try:
data = web.input()
if len(data) == 0:
db=MySQLdb.connect(host=sae.const.MYSQL_HOST,port=int(sae.const.MYSQL_PORT), user=sae.const.MYSQL_USER, passwd=sae.const.MYSQL_PASS, db=sae.const.MYSQL_DB)
cursor = db.cursor()
sql_query = "SELECT * FROM switch where id=1"
content=""
try:
cursor.execute(sql_query)
results = cursor.fetchall()
for row in results:
arduino_id = row[0]
arduino_state = row[1]
content = arduino_state
except:
content = "Error: unable to fetch data"
if content==1:
return "}"
elif content==0:
return "{"
return None
signature = data.signature
timestamp = data.timestamp
nonce = data.nonce
echostr = data.echostr
token = "xxxxxxx" #改成自己的威信token

list = [token, timestamp, nonce]
list.sort()
sha1 = hashlib.sha1()
map(sha1.update, list)
hashcode = sha1.hexdigest()
print "handle/GET func: hashcode, signature: ", hashcode, signature
if hashcode == signature:
return echostr
else:
return ""
except Exception, Argument:
return Argument

def POST(self):
try:
webData = web.data()
print "Handle Post webdata is ", webData
recMsg = receive.parse_xml(webData)
if isinstance(recMsg, receive.Msg) and recMsg.MsgType == 'text':
toUser = recMsg.FromUserName
fromUser = recMsg.ToUserName
content =sae.const.MYSQL_USER
db=MySQLdb.connect(host=sae.const.MYSQL_HOST,port=int(sae.const.MYSQL_PORT), user=sae.const.MYSQL_USER, passwd=sae.const.MYSQL_PASS, db=sae.const.MYSQL_DB)
cursor = db.cursor()
sql_query = "SELECT * FROM switch where id=1"
sql_update_1 = "UPDATE switch set state=1 where id=1"
sql_update_0 = "UPDATE switch set state=0 where id=1"
arduino_id, arduino_state = None, None
try:
cursor.execute(sql_query)
results = cursor.fetchall()
for row in results:
arduino_id = row[0]
arduino_state = row[1]
except:
content = "Error: unable to fetch data"
if recMsg.Content == "open":
if arduino_state != 1:

try:
cursor.execute(sql_update_1)
db.commit()
except:
db.rollback()
elif recMsg.Content == "close":
if arduino_state != 0:

try:
cursor.execute(sql_update_0)
db.commit()
except:
db.rollback()
else:
content = recMsg.Content
try:
cursor.execute(sql_query)
results = cursor.fetchall()
for row in results:
arduino_id = row[0]
arduino_state = row[1]
content = "arduino_state:" + str(arduino_state)
except:
content = "Error: unable to fetch data"
db.close()
replyMsg = reply.TextMsg(toUser, fromUser, content)
return replyMsg.send()
else:
print "暂且不处理"
return "success"
except Exception, Argment:
return Argment

三、微信公众平台

1）注册微信公众号

2）启动服务器配置

设置–>公众号设置–>服务器设置



注意：需要新浪云服务器搭建好了，微信服务器提交才能成功