NodeMCU

NodeMCU是一個開源的物聯網平臺。 它使用Lua指令碼語言程式設計。該平臺基於eLua 開源專案,底層使用ESP8266 sdk 0.9.5版本。該平臺使用了很多開源專案, 例如 lua-cjson, spiffs. NodeMCU包含了可以執行在 esp8266 Wi-Fi SoC晶片之上的韌體,以及基於ESP-12模組的硬體。已隱藏部分未翻譯內容，歡迎參與[ 翻譯]。History.NodeMCU is started after ESP8266 come out. In December 30, 2013, Espressif systems begin production of ESP8266. ESP8266 is an Wi-Fi SoC and integrated with LX106 core, widely used in IoT applications(See related projects). In 13 Oct 2014, Hong committed first file of nodemcu-firmware to github, NodeMCU project started. And then more and more developers from ESP8266 opensource community join in NodeMCU developer team. On 1 Dec 2014, Huang R commit the gerber file of an ESP8266 board, then NodeMCU project have the first open-hardware which named devkit 1.0, thus NodeMCU is not only a firmware, it becomes a platform. In 31 Dec 2014, Tuan PM port MQTT client library from Contiki to ESP8266 SoC platform, and commit to NodeMCU project, then NodeMCU can support MQTT IoT protocol, using Lua access MQTT broker, it is an important update of firmware. Another important update is in 30 Jan 2015, Devsaurus port u8glib to NodeMCU project, and NodeMCU can drive LCD, Screen, OLED, even VGA display module easily.韌體燒寫.nodemcu_latest.bin: 0x00000 對於大多數 esp8266 模組, 直接拉低 GPIO0 引腳的電平，並且重新上電或重啟。 可以使用 nodemcu-flasher 燒寫韌體。特別的，如果你想編譯/構建自己的韌體，需要注意以下燒寫地址： 0x00000.bin: 0x00000 0x10000.bin: 0x10000注意，"在燒寫之後，最好執行 file.format() "硬體連線.如果使用 NodeMCU devkit, 只需要安裝 CH340G 驅動程式, 並且將開發模組使用micro-usb 線連線到電腦。 然後，將波特率設為9600, 並開啟序列埠。若使用普通的esp8266模組, 則必須準備usb-ttl 轉接器。程式舉例.連線Wi-Fi熱點.ip = wifi.sta.getip()print(ip)--nilwifi.setmode(wifi.STATION)wifi.sta.config("SSID","password")ip = wifi.sta.getip()print(ip)--192.168.18.110如同arduino般操作硬體.pin = 1gpio.mode(pin,gpio.OUTPUT)gpio.write(pin,gpio.HIGH)print(gpio.read(pin))使用 nodejs 風格網路程式設計.-- A simple http clientconn=net.createConnection(net.TCP, 0)conn:on("receive", function(conn, payload) print(payload) end )conn:connect(80,"115.239.210.27")conn:send("GET / HTTP/1.1\r\nHost: www.baidu.com\r\n".."Connection: keep-alive\r\nAccept: */*\r\n\r\n")簡易的HTTP伺服器.-- A simple http serversrv=net.createServer(net.TCP)srv:listen(80,function(conn)conn:on("receive",function(conn,payload)print(payload)conn:send("")end)conn:on("sent",function(conn) conn:close() end)end)連線 MQTT Broker.-- init mqtt client with keepalive timer 120secm = mqtt.Client("clientid", 120, "user", "password")-- setup Last Will and Testament (optional)-- Broker will publish a message with qos = 0, retain = 0, data = "offline"-- to topic "/lwt" if client don't send keepalive packetm:lwt("/lwt", "offline", 0, 0)m:on("connect", function(con) print ("connected") end)m:on("offline", function(con) print ("offline") end)-- on publish message receive eventm:on("message", function(conn, topic, data)print(topic .. ":" )if data ~= nil thenprint(data)endend)-- for secure: m:connect("192.168.11.118", 1880, 1)m:connect("192.168.11.118", 1880, 0, function(conn) print("connected") end)-- subscribe topic with qos = 0m:subscribe("/topic",0, function(conn) print("subscribe success") end)-- or subscribe multiple topic (topic/0, qos = 0; topic/1, qos = 1; topic2 , qos = 2)-- m:subscribe({["topic/0"]=0,["topic/1"]=1,topic2=2}, function(conn) print("subscribe success") end)-- publish a message with data = hello, QoS = 0, retain = 0m:publish("/topic","hello",0,0, function(conn) print("sent") end)m:close();-- you can call m:connect againUDP 客戶端與伺服器.-- a udp servers=net.createServer(net.UDP)s:on("receive",function(s,c) print(c) end)s:listen(5683)-- a udp clientcu=net.createConnection(net.UDP)cu:on("receive",function(cu,c) print(c) end)cu:connect(5683,"192.168.18.101")cu:send("hello")