基本流程

刷固件

固件下载

1. 在nodemcu官网下载固件点击跳转
   输入你的邮箱，注意确认邮箱直接输入，不要复制上方邮箱,此邮箱用于接收构建好的固件。
   
2. 选取需要用到的模块
   
   3.保存默认点击 Start your build
   
   4.成功获取到固件到邮件去下载
   

第一封 正在构建你的固件

第二封 构建完成 下载相应的固件 一个支持浮点型，一个支持整型

5.打开固件下载固件获取
选择刚刚下载的固件

6.按图配置开始刷固件

完成

阿里云

登录阿里云控制台，进入物联网平台

创建产品

名字随便，数据格式 alink json

创建设备

在产品下创建一个设备

保存好三元组备用

{
“ProductKey”: “a1Ulg1U99vn”,
“DeviceName”: “PhysicalDevice”,
“DeviceSecret”: “2FkXL2JQfyGpnq9GzEZcdljOZyIIWSLw”
}

示例代码

cfg={}
cfg.ssid="802.1x"
cfg.pwd="123456789rg"
pin = 0
gpio.mode(pin,gpio.OUTPUT)
gpio.write(pin,gpio.HIGH)
----[wifi connect]---------------
wifi.setmode(wifi.STATION)
wifi.sta.config(cfg)
wifi.sta.connect()
print("wifi connecting")
----[wifi connected]--------
wifi.eventmon.register(wifi.eventmon.STA_GOT_IP, function(T)
print("Connected, IP is "..wifi.sta.getip())
end)
wifi.eventmon.register(wifi.eventmon.STA_DISCONNECTED, function(T)
print("wifi disconnect")
end)
---------------------
--------[getTime]--------------------
function GetNetTime()
sntp.sync({"0.nodemcu.pool.ntp.org","1.nodemcu.pool.ntp.org","2.nodemcu.pool.ntp.org","3.nodemcu.pool.ntp.org","www.beijing-time.org"},
function(sec, usec, server, info)
print('sync', sec, usec, server)
end,
function()
print("get time error")
end)
return 0
end
---------------------
----[3yuanzu]------
ProductKey ="a1Ulg1U99vn"
DeviceName ="PhysicalDevice"
DeviceSecret="2FkXL2JQfyGpnq9GzEZcdljOZyIIWSLw"
RegionId="cn-shanghai"
topic0="/sys/a1Ulg1U99vn/PhysicalDevice/thing/service/property/set"
topic1="/sys/a1Ulg1U99vn/PhysicalDevice/thing/event/property/post"
myMQTTport=1883
--port
myMQTT=nil
--client
ClientId = wifi.sta.getmac()
myMQTTtimes='6666'
---------------------
myMQTThost=ProductKey..".iot-as-mqtt."..RegionId..".aliyuncs.com"
--host
myMQTTusername=DeviceName.."&"..ProductKey
--username
--------MQTT------------------
myMQTTtimes='6666'
hmacdata="clientId"..ClientId.."deviceName"..DeviceName.."productKey"..ProductKey.."timestamp"..myMQTTtimes
myMQTTpassword=crypto.toHex(crypto.hmac("sha1",hmacdata,DeviceSecret))
myMQTTClientId=ClientId.."|securemode=3,signmethod=hmacsha1,timestamp="..myMQTTtimes.."|"
----[Create MQTT
client]
myMQTT=mqtt.Client(myMQTTClientId, 120,myMQTTusername,myMQTTpassword)
----[Start Timing Connection]-----
MQTTconnectFlag=0
time =tmr.create()
time:alarm(10000,tmr.ALARM_AUTO,function()
if myMQTT~=nil then
print("Attempting client connect...")
myMQTT:connect(myMQTThost, myMQTTport,0,MQTTSuccess,MQTTFailed)
end
end)
--[Connect Successful]---
function MQTTSuccess(client)
print("MQTT connected")
client:subscribe(topic0,0, function(conn)
--topic0
print("subscribe topic0 success")
end)
myMQTT=client
MQTTconnectFlag=1
time:stop()
end
---[Connect Fail---
function MQTTFailed(client,reson)
print("Fail reson:"..reson)
MQTTconnectFlag=0
time:start()
end
--[Device offline Event]-----
myMQTT:on("offline", function(client)
print ("offline")
time:start()
end)
---------------------
--[Registered Device Receives Subscribed Topic Events]-----
myMQTT:on("message", function(client, topic, data)
print("Recieved Topic:/"..topic .. ":" )
if data ~= nil then
print(data)
end
end)
--[topic Timely upload of data]
time1 = tmr.create()
temp =10.1
ok,json = pcall(sjson.encode, {method="thing.service.property.set",id="978050866",params={Temperature=temp,version="1.0.0"}})
--ok,json = pcall(sjson.encode, {id="1",params={Temperature=30.1,Data="test1"}})
data= "this is my first time connect alibaba cloud"
time1:alarm(10000, 1, function()
--watting connect
tmr.wdclr()
else
temp = 10
end
if MQTTconnectFlag==1 and myMQTT~=nil then
myMQTT:publish(topic0,json,0,0,function(client)
print("send ok")
end)
gpio.write(pin,gpio.LOW)
tmr.delay(1000000)
gpio.write(pin,gpio.HIGH)
end
end)

最后

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