nodeMCU dimmer/switch/temp.sensor without arduino

------------------------------------------------------------------------------
-- DHT11/22 query module
--
-- LICENCE: http://opensource.org/licenses/MIT
-- Vladimir Dronnikov <dronnikov@gmail.com>
--
-- Example:
-- print("DHT11", dofile("dht22.lua").read(4))
-- print("DHT22", dofile("dht22.lua").read(4, true))
-- NB: the very first read sometimes fails
------------------------------------------------------------------------------
local M
do
  -- cache
  local gpio = gpio
  local val = gpio.read
  local waitus = tmr.delay
  --
  local read = function(pin, dht22)
    -- wait for pin value
    local w = function(v)
      local c = 255
      while c > 0 and val(pin) ~= v do c = c - 1 end
      return c
    end
    -- NB: we preallocate incoming data buffer
    --     or precise timing in reader gets broken
    local b = { 0, 0, 0, 0, 0 }

    -- kick the device
    gpio.mode(pin, gpio.INPUT, gpio.PULLUP)
    gpio.write(pin, 1)
    waitus(10)
    gpio.mode(pin, gpio.OUTPUT)
    gpio.write(pin, 0)
    waitus(20000)
    gpio.write(pin, 1)
    gpio.mode(pin, gpio.INPUT, gpio.PULLUP)
    -- wait for device presense
    if w(0) == 0 or w(1) == 0 or w(0) == 0 then
      return nil, 0
    end
    -- receive 5 octets of data, msb first
    for i = 1, 5 do
      local x = 0
      for j = 1, 8 do
        x = x + x
        if w(1) == 0 then return nil, 1 end
        -- 70us for 1, 27 us for 0
        waitus(30)
        if val(pin) == 1 then
          x = x + 1
          if w(0) == 0 then return nil, 2 end
        end
      end
      b[i] = x
    end
    -- check crc. NB: calculating in receiver loop breaks timings
    local crc = 0
    for i = 1, 4 do
      crc = (crc + b[i]) % 256
    end
    if crc ~= b[5] then return nil, 3 end
    -- convert
    local t, h
    -- DHT22: values in tenths of unit, temperature can be negative
    if dht22 then
      h = (b[1] * 256 + b[2])
      t = (b[3] * 256 + b[4])
      if t > 0x8000 then t = -(t - 0x8000) end
    -- DHT11: no negative temperatures, only integers
    -- NB: return in 0.1 Celsius
    else
      h = (10 * b[1])
      t = (10 * b[3])
    end
    return t
  end
  -- expose interface
  M = {
    read = read,
  }
end
return M

--
--print("init")
--dofile("dht22.lua").read(4)
--tmr.delay(1000000)
--print("read")
--myval = dofile("dht22.lua").read(4)
--print(myval)
--


pwm.setup(3, 1000, 000)
pwm.start(3)

LED1_current=000
LED1_target=000

SWITCH1_state = 0

Fadetime1=1000

Stepcounter1=0
PosStepcounter1=0
DimTimer1=0


wifi.setmode(wifi.STATION)
wifi.sta.config("SSID","PASS")



srv=net.createServer(net.TCP) 
srv:listen(43333,function(conn) 
    conn:on("receive",function(conn,payload) 
   
    print("Input: "..payload) 
 
	if string.find(payload,"GETTEMP") then
	 print("Received temperature request")
	 --print("init")
      dofile("dht22.lua").read(4)
      tmr.delay(1000000)
      print("read")
      myval = (dofile("dht22.lua").read(4)/10)
      print(myval)
	 conn:send(myval)

     elseif string.find(payload,"SWITCH1") then
     SWITCH1_state=tonumber(string.sub(payload, 9) )
     print("Received SWITCH1 target Value: "..SWITCH1_state)
     if SWITCH1_state == 1 then
          pwm.setduty(3, 1023)
          LED1_current = 1023
      elseif SWITCH1_state == 0 then
          pwm.setduty(3, 0)
          LED1_current = 0
        end
     

     
    elseif string.find(payload,"LED1") then
     LED1_target=tonumber(string.sub(payload, 13) )
     print("Received LED1 Target Value: "..LED1_target)

     Stepcounter1=(LED1_target)-(LED1_current)
     
     if (Stepcounter1) < 0 then
      PosStepcounter1=(Stepcounter1)*-1
      else PosStepcounter1=(Stepcounter1)
     end
     
     if (PosStepcounter1) == 0 then
      PosStepcounter1=(PosStepcounter1)+1
      else PosStepcounter1=(PosStepcounter1)
     end
          
     DimTimer1=(Fadetime1)/(PosStepcounter1)

     if (DimTimer1) == 0 then 
      DimTimer1=(DimTimer1)+1
      else DimTimer1=(DimTimer1)
     end

      print (Fadetime1)
      print (Stepcounter1)
      print (PosStepcounter1)
      print (DimTimer1)
      print (LED1_current)
      print (LED1_target)


    tmr.alarm(0, (DimTimer1), 1, function() 
     if LED1_current < LED1_target then 
      LED1_current = (LED1_current + 1) 
      pwm.setduty(3, LED1_current)
    elseif LED1_current > LED1_target then 
      LED1_current = (LED1_current - 1) 
      pwm.setduty(3, LED1_current)
    elseif LED1_current == LED1_target then tmr.stop(0)
     end end )
    

    end
    end)
    end)

print ("easyIoT dimmer/switch/temperature sensor for nodeMCU")
print ("Based on QuinLED_ESP8266_V0.4")