README: Tidy the sample code
Signed-off-by: Nick Andrew <nick@nick-andrew.net>
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Nick Andrew
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README.md
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README.md
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@ -47,7 +47,7 @@ Because Lua is a high level language and several modules are built into the firm
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print(ip)
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--nil
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wifi.setmode(wifi.STATION)
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wifi.sta.config("SSID","password")
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wifi.sta.config("SSID", "password")
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ip = wifi.sta.getip()
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print(ip)
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--192.168.18.110
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@ -57,8 +57,8 @@ Because Lua is a high level language and several modules are built into the firm
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```lua
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pin = 1
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gpio.mode(pin,gpio.OUTPUT)
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gpio.write(pin,gpio.HIGH)
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gpio.mode(pin, gpio.OUTPUT)
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gpio.write(pin, gpio.HIGH)
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print(gpio.read(pin))
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```
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@ -67,10 +67,10 @@ Because Lua is a high level language and several modules are built into the firm
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```lua
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-- A simple http client
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conn=net.createConnection(net.TCP, 0)
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conn:on("receive", function(conn, payload) print(payload) end )
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conn:connect(80,"115.239.210.27")
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conn:on("receive", function(conn, payload) print(payload) end)
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conn:connect(80, "115.239.210.27")
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conn:send("GET / HTTP/1.1\r\nHost: www.baidu.com\r\n"
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.."Connection: keep-alive\r\nAccept: */*\r\n\r\n")
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.. "Connection: keep-alive\r\nAccept: */*\r\n\r\n")
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```
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## Or a simple HTTP server
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@ -78,12 +78,12 @@ Because Lua is a high level language and several modules are built into the firm
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```lua
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-- A simple http server
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srv=net.createServer(net.TCP)
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srv:listen(80,function(conn)
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conn:on("receive",function(conn,payload)
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srv:listen(80, function(conn)
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conn:on("receive", function(conn,payload)
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print(payload)
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conn:send("<h1> Hello, NodeMcu.</h1>")
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conn:send("<h1> Hello, NodeMCU.</h1>")
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end)
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conn:on("sent",function(conn) conn:close() end)
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conn:on("sent", function(conn) conn:close() end)
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end)
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```
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@ -95,33 +95,33 @@ m = mqtt.Client("clientid", 120, "user", "password")
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-- setup Last Will and Testament (optional)
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-- Broker will publish a message with qos = 0, retain = 0, data = "offline"
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-- to topic "/lwt" if client don't send keepalive packet
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-- to topic "/lwt" if client doesn't send keepalive packet
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m:lwt("/lwt", "offline", 0, 0)
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m:on("connect", function(con) print ("connected") end)
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m:on("offline", function(con) print ("offline") end)
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m:on("connect", function(con) print("connected") end)
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m:on("offline", function(con) print("offline") end)
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-- on publish message receive event
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m:on("message", function(conn, topic, data)
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print(topic .. ":" )
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print(topic .. ":")
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if data ~= nil then
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print(data)
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end
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end)
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-- m:connect( host, port, secure, auto_reconnect, function(client) )
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-- m:connect(host, port, secure, auto_reconnect, function(client) end)
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-- for secure: m:connect("192.168.11.118", 1880, 1, 0)
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-- for auto-reconnect: m:connect("192.168.11.118", 1880, 0, 1)
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m:connect("192.168.11.118", 1880, 0, 0, function(conn) print("connected") end)
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-- subscribe topic with qos = 0
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m:subscribe("/topic",0, function(conn) print("subscribe success") end)
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-- or subscribe multiple topic (topic/0, qos = 0; topic/1, qos = 1; topic2 , qos = 2)
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-- subscribe to topic with qos = 0
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m:subscribe("/topic", 0, function(conn) print("subscribe success") end)
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-- or subscribe multiple topics (topic/0, qos = 0; topic/1, qos = 1; topic2, qos = 2)
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-- m:subscribe({["topic/0"]=0,["topic/1"]=1,topic2=2}, function(conn) print("subscribe success") end)
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-- publish a message with data = hello, QoS = 0, retain = 0
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m:publish("/topic","hello",0,0, function(conn) print("sent") end)
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m:publish("/topic", "hello", 0, 0, function(conn) print("sent") end)
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m:close(); -- if auto-reconnect == 1, will disable auto-reconnect and then disconnect from host.
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m:close(); -- if auto-reconnect == 1, it will disable auto-reconnect and then disconnect from host.
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-- you can call m:connect again
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```
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@ -131,45 +131,45 @@ m:close(); -- if auto-reconnect == 1, will disable auto-reconnect and then disc
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```lua
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-- a udp server
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s=net.createServer(net.UDP)
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s:on("receive",function(s,c) print(c) end)
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s:on("receive", function(s, c) print(c) end)
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s:listen(5683)
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-- a udp client
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cu=net.createConnection(net.UDP)
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cu:on("receive",function(cu,c) print(c) end)
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cu:connect(5683,"192.168.18.101")
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cu:on("receive", function(cu, c) print(c) end)
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cu:connect(5683, "192.168.18.101")
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cu:send("hello")
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```
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## Do something shiny with an RGB LED
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```lua
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function led(r,g,b)
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pwm.setduty(1,r)
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pwm.setduty(2,g)
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pwm.setduty(3,b)
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function led(r, g, b)
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pwm.setduty(1, r)
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pwm.setduty(2, g)
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pwm.setduty(3, b)
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end
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pwm.setup(1,500,512)
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pwm.setup(2,500,512)
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pwm.setup(3,500,512)
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pwm.setup(1, 500, 512)
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pwm.setup(2, 500, 512)
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pwm.setup(3, 500, 512)
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pwm.start(1)
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pwm.start(2)
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pwm.start(3)
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led(512,0,0) -- red
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led(0,0,512) -- blue
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led(512, 0, 0) -- red
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led(0, 0, 512) -- blue
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```
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## And blink it
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```lua
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lighton=0
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tmr.alarm(1,1000,1,function()
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tmr.alarm(1, 1000, 1, function()
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if lighton==0 then
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lighton=1
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led(512,512,512)
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led(512, 512, 512)
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else
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lighton=0
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led(0,0,0)
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led(0, 0, 0)
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end
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end)
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```
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@ -177,8 +177,8 @@ cu:send("hello")
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## If you want to run something when the system boots
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```lua
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--init.lua will be excuted
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file.open("init.lua","w")
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--init.lua will be executed
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file.open("init.lua", "w")
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file.writeline([[print("Hello, do this at the beginning.")]])
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file.close()
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node.restart() -- this will restart the module.
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@ -188,21 +188,21 @@ cu:send("hello")
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```lua
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-- a simple telnet server
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s=net.createServer(net.TCP,180)
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s:listen(2323,function(c)
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s=net.createServer(net.TCP, 180)
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s:listen(2323, function(c)
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function s_output(str)
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if(c~=nil)
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then c:send(str)
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end
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end
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node.output(s_output, 0) -- re-direct output to function s_ouput.
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c:on("receive",function(c,l)
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node.input(l) -- works like pcall(loadstring(l)) but support multiple separate line
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c:on("receive", function(c, l)
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node.input(l) -- works like pcall(loadstring(l)) but support multiples separate lines
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end)
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c:on("disconnection",function(c)
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node.output(nil) -- un-regist the redirect output function, output goes to serial
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c:on("disconnection", function(c)
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node.output(nil) -- un-register the redirect output function, output goes to serial
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end)
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print("Welcome to NodeMcu world.")
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print("Welcome to NodeMCU world.")
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end)
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```
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