init.lua

-- Begin WiFi configuration

local wifiConfig = {}

-- wifi.STATION         -- station: join a WiFi network
-- wifi.AP              -- access point: create a WiFi network
-- wifi.wifi.STATIONAP  -- both station and access point
wifiConfig.mode = wifi.STATIONAP  -- both station and access point

wifiConfig.accessPointConfig = {}
wifiConfig.accessPointConfig.ssid = "ESP-"..node.chipid()   -- Name of the SSID you want to create
wifiConfig.accessPointConfig.pwd = "ESP-"..node.chipid()    -- WiFi password - at least 8 characters

wifiConfig.stationPointConfig = {}
wifiConfig.stationPointConfig.ssid = "Internet"    -- Name of the WiFi network you want to join
wifiConfig.stationPointConfig.pwd =  ""            -- Password for the WiFi network

-- Tell the chip to connect to the access point

wifi.setmode(wifiConfig.mode)
print('set (mode='..wifi.getmode()..')')
print('MAC: ',wifi.sta.getmac())
print('chip: ',node.chipid())
print('heap: ',node.heap())

wifi.ap.config(wifiConfig.accessPointConfig)
wifi.sta.config(wifiConfig.stationPointConfig.ssid, wifiConfig.stationPointConfig.pwd)
wifiConfig = nil
collectgarbage()

-- End WiFi configuration

-- Compile server code and remove original .lua files.
-- This only happens the first time afer the .lua files are uploaded.

local compileAndRemoveIfNeeded = function(f)
   if file.open(f) then
      file.close()
      print('Compiling:', f)
      node.compile(f)
      file.remove(f)
      collectgarbage()
   end
end

local serverFiles = {'httpserver.lua', 'httpserver-request.lua', 'httpserver-static.lua', 'httpserver-header.lua', 'httpserver-error.lua'}
for i, f in ipairs(serverFiles) do compileAndRemoveIfNeeded(f) end

compileAndRemoveIfNeeded = nil
serverFiles = nil
collectgarbage()

-- Connect to the WiFi access point.
-- Once the device is connected, you may start the HTTP server.

local joinCounter = 0
local joinMaxAttempts = 5
tmr.alarm(0, 3000, 1, function()
   local ip = wifi.sta.getip()
   if ip == nil and joinCounter < joinMaxAttempts then
      print('Connecting to WiFi Access Point ...')
      joinCounter = joinCounter +1
   else
      if joinCounter == joinMaxAttempts then
         print('Faild to connect to WiFi Access Point.')
      else
         print('IP: ',ip)
         -- Uncomment to automatically start the server in port 80
         --dofile("httpserver.lc")(80)
      end
      tmr.stop(0)
      joinCounter = nil
      joinMaxAttempts = nil
      collectgarbage()
   end

end)