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--- nodemcu [2015/01/07 11:44]
gwizz created
+++ nodemcu [2015/12/07 18:57]
mrmonteith [Connect the hardware in serial]
@@ Line 1: / Line 1: @@
-NodeMCU is under very active development.
+====== NodeMCU ======
-See the github page: [[https://github.com/nodemcu/nodemcu-firmware]]
+ * See the [[nodemcu-unofficial-faq|nodeMCU Unofficial FAQ]] for answers to your "Frequently Asked Questions".
+===== Hardware =====
+NodeMCU devkit is a development kit for NodeMCU firmware.\\ It will make NodeMCU more easy. With a micro USB cable, you can connect NodeMCU devkit to your laptop and flash it without any trouble, just like Arduino.\\ It is an open hardware, with ESP-12 core with 32Mbits(4MBytes) flash.
+==== Devkit 0.8 ====
+It is the original design of NodeMCU devkit. Very old and never sell on shop. It can't automatic flash firmware.
+{{:devkit_0.8.jpg?600|}}
+==== Devkit 0.9 ====
+It is the second design of NodeMCU devkit. It uses CH340G as UART bridge, and can flash firmware automatically by using nodemcu-flasher.
+{{:devkit_0.9.jpg?300|}}
+{{:devkit_0.9_B.jpg?300|}}
+==== Devkit 1.0 ====
+It is the 5th design of NodeMCU devkit. It uses CP2102 as UART bridge, and can flash firmware automatically by using nodemcu-flasher. It support apple's MAC OS.
+{{:devkit_1.0.jpg?600|}}
+===== Introduction =====
+  * Website: [[http://www.nodemcu.com/index_en.html]]
+  * Forum: [[http://www.esp8266.com/viewforum.php?f=17]]
+  * Firmware: [[https://github.com/nodemcu/nodemcu-firmware]]
+  * Hardware: [[https://github.com/nodemcu/nodemcu-devkit]]
+  * Flasher: [[https://github.com/nodemcu/nodemcu-flasher]]
+===== Summary =====
+  * Easy to access wireless router
+  * Based on Lua 5.1.4 (without debug, os module.)
+  * Event-Drive programming preferred.
+  * Build-in json, file, timer, pwm, i2c, spi, 1-wire, net, mqtt, coap, gpio, wifi, adc, uart and system api.
+  * GPIO pin re-mapped, use the index to access gpio, i2c, pwm.
+  * Both Integer(less memory usage) and Float version firmware provided.
+===== Dependencies =====
+  * Build on ESP8266 sdk 0.9.5
+  * Lua core based on eLua project
+  * cjson based on lua-cjson
+  * File system based on spiffs
+===== Flash the firmware =====
+nodemcu_latest.bin: 0x00000\\ for most esp8266 modules, just pull GPIO0 down and restart.\\ You can use the [[https://github.com/nodemcu/nodemcu-flasher|nodemcu-flasher]] to burn the firmware.
+Or, if you build your own bin from source code.\\ 0x00000.bin: 0x00000\\ 0x10000.bin: 0x10000
+//Better run file.format() after flash//
+===== Connect to the hardware via serial interface =====
+Need to explain how to connect up serial portion.
+baudrate:9600
+===== Start play =====
+=== Connect to your ap ===
+<code lang="lua">
+ip = wifi.sta.getip()
+print(ip)
+-- nil
+wifi.setmode(wifi.STATION)
+wifi.sta.config("SSID","password")
+ip = wifi.sta.getip()
+print(ip)
+-- 192.168.18.110
+</code>
+=== Manipulate hardware like a arduino ===
+<code lang="lua">
+pin = 1
+gpio.mode(pin,gpio.OUTPUT)
+gpio.write(pin,gpio.HIGH)
+print(gpio.read(pin))
+</code>
+=== Write network application in nodejs style ===
+<code lang="lua">
+-- A simple http client
+conn=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")
+</code>
+=== Or a simple http server ===
+<code lang="lua">
+-- A simple http server
+srv=net.createServer(net.TCP)
+srv:listen(80,function(conn)
+  conn:on("receive",function(conn,payload)
+    print(payload)
+    conn:send("<h1> Hello, NodeMcu.</h1>")
+  end)
+  conn:on("sent",function(conn) conn:close() end)
+end)
+</code>
+=== Connect to MQTT Broker ===
+<code lang="lua">
+-- init mqtt client with keepalive timer 120sec
+m = 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 packet
+m: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 event
+m:on("message", function(conn, topic, data)
+  print(topic .. ":" )
+  if data ~= nil then
+    print(data)
+  end
+end)
+-- 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 = 0
+m: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 = 0
+m:publish("/topic","hello",0,0, function(conn) print("sent") end)
+m:close();
+-- you can call m:connect again
+</code>
+=== UDP client and server ===
+<code lang="lua">
+-- a udp server
+s=net.createServer(net.UDP)
+s:on("receive",function(s,c) print(c) end)
+s:listen(5683)
+-- a udp client
+cu=net.createConnection(net.UDP)
+cu:on("receive",function(cu,c) print(c) end)
+cu:connect(5683,"192.168.18.101")
+cu:send("hello")
+</code>
-And the website for the project: [[http://nodemcu.com/index_en.html]]

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