###A lua based firmware for wifi-soc esp8266 version 0.9.2 build 2014-11-20
- Easy to access wireless router
- Based on Lua 5.1.4
- Event-Drive programming preferred.
- Build-in file, timer, pwm, i2c, net, gpio, wifi, and system api.
- GPIO pin re-mapped, use the index to access gpio, i2c, pwm.
- GPIO Map Table:
IO index | ESP8266 pin | IO index | ESP8266 pin |
---|---|---|---|
0 | GPIO12 | 8 | GPIO0 |
1 | GPIO13 | 9 | GPIO2 |
2 | GPIO14 | 10 | GPIO4 |
3 | GPIO15 | 11 | GPIO5 |
4 | GPIO3 | ||
5 | GPIO1 | ||
6 | GPIO9 | ||
7 | GPIO10 |
#Flash the firmware
nodemcu_512k.bin: 0x00000
for most esp8266 modules, just pull GPIO0 down and restart.
#Connect the hardware in serial braudrate:9600
#Start play
####Connect to your ap
print(wifi.sta.getip())
--0.0.0.0
wifi.setmode(wifi.STATION)
wifi.sta.config("SSID","password")
print(wifi.sta.getip())
--192.168.18.110
####Manipulate hardware like a arduino
pin = 1
gpio.mode(pin,gpio.OUTPUT)
gpio.write(pin,gpio.HIGH)
print(gpio.read(pin))
####Write network application in nodejs style
-- A simple http client
conn=net.createConnection(net.TCP, 0)
conn:on("receive", function(conn, payload) print(c) 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")
####Or a simple http server
-- 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)
####Do something shining
function led(r,g,b)
pwm.setduty(0,r)
pwm.setduty(1,g)
pwm.setduty(2,b)
end
pwm.setup(0,500,50)
pwm.setup(1,500,50)
pwm.setup(2,500,50)
pwm.start(0)
pwm.start(1)
pwm.start(2)
led(50,0,0) -- red
led(0,0,50) -- blue
####And blink it
lighton=0
tmr.alarm(1000,1,function()
if lighton==0 then
lighton=1
led(50,50,50)
else
lighton=0
led(0,0,0)
end
end)
####If you want to run something when system started
--init.lua will be excuted
file.open("init.lua","w")
file.writeline([[print("Hello, do this at the beginning.")]])
file.close()
node.restart() -- this will restart the module.
####With below code, you can telnet to your esp8266 now
-- a simple telnet server
s=net.createServer(net.TCP,180)
s:listen(2323,function(c)
function s_output(str)
if(c~=nil)
then c:send(str)
end
end
node.output(s_output, 0) -- re-direct output to function s_ouput.
c:on("receive",function(c,l)
node.input(l) -- works like pcall(loadstring(l)) but support multiple separate line
end)
c:on("disconnection",function(c)
node.output(nil) -- un-regist the redirect output function, output goes to serial
end)
print("Welcome to NodeMcu world.")
end)
#Check this out
Tencent QQ group: 309957875
nodemcu wiki
nodemcu.com