- Tue Oct 27, 2015 1:47 pm
#32392
Thank you Janko, that works for me
working on dht 11 and nodemcu devkit 0.9
Would be realy great if this version would be put on th top
working on dht 11 and nodemcu devkit 0.9
Would be realy great if this version would be put on th top
jankop wrote:Previous program does not work correctly in floating point. That's why I edited it for floating point arithmetic. For proper operation, it is necessary to set in program fpmdht.lua sensor type. This is parameter typeSensor = "dht11" or "dht22".
Load program fpmdht.lua and dht.lua to ESP8266 with LuaLoaderCode: Select all-- Demo http server for sensors DHT11/22
-- Tested with Lua NodeMCU 0.9.5 build 20150127 floating point !!!
-- 1. Flash Lua NodeMCU to ESP module.
-- 2. Set in program fpmdht.lua sensor type. This is parameter typeSensor="dht11" or "dht22".
-- 3. You can rename the program fpmdht.lua to init.lua
-- 4. Load program fpmdht.lua and dht.lua to ESP8266 with LuaLoader
-- 5. HW reset module
-- 6. Login module to your AP - wifi.setmode(wifi.STATION),wifi.sta.config("yourSSID","yourPASSWORD")
-- 7. Run program fpmdht.lua - dofile(fpmdht.lua)
-- 8. Test IP address - wifi.sta.getip()
-- 9. Test it with your browser and true IP address of module.
--10. The sensor is repeatedly read every minute.
--11. The pictures on page are external.
--12. The length of html code is limited to 1460 characters including header.
-- The author of the program module dht.lua for reading DHT sensor is Javier Yanez
--*******************************
sensorType="dht22" -- set sensor type dht11 or dht22
--*******************************
wifi.setmode(wifi.STATION)
--wifi.sta.config("yourSSID","yourPASSWORD")
wifi.sta.connect()
tmr.delay(1000000)
humi="XX"
temp="XX"
fare="XX"
count=1
PIN = 4 -- data pin, GPIO2
--load DHT module and read sensor
function ReadDHT()
dht=require("dht")
dht.read(PIN)
if sensorType=="dht11"then
humi=dht.getHumidity()/256
temp=dht.getTemperature()/256
else
humi=dht.getHumidity()/10
temp=dht.getTemperature()/10
end
fare=(temp*9/5+32)
print("Humidity: "..humi.."%")
print("Temperature: "..temp.." deg C")
print("Temperature: "..fare.." deg F")
-- release module
dht=nil
package.loaded["dht"]=nil
end
ReadDHT()
tmr.alarm(1,60000,1,function()ReadDHT()count=count+1 if count==5 then count=0 wifi.sta.connect()print("Reconnect")end end)
srv=net.createServer(net.TCP) srv:listen(80,function(conn)
conn:on("receive",function(conn,payload)
--print(payload) -- for debugging only
strstr={string.find(payload,"GET / HTTP/1.1")}
if(strstr[1]~=nil)then
--generates HTML web site
conn:send('HTTP/1.1 200 OK\r\nConnection: keep-alive\r\nCache-Control: private, no-store\r\n\r\n\
<!DOCTYPE HTML>\
<html><head><meta content="text/html;charset=utf-8"><title>ESP8266</title></head>\
<body bgcolor="#ffe4c4"><h2>Hygrometer with<br>'..sensorType..' sensor</h2>\
<h3><font color="green">\
<IMG SRC="http://esp8266.fancon.cz/common/hyg.gif"WIDTH="64"HEIGHT="64"><br>\
<input style="text-align: center"type="text"size=4 name="j"value="'..humi..'"> % of relative humidity<br><br>\
<IMG SRC="http://esp8266.fancon.cz/common/tmp.gif"WIDTH="64"HEIGHT="64"><br>\
<input style="text-align: center"type="text"size=4 name="p"value="'..temp..'"> Temperature grade C<br>\
<input style="text-align: center"type="text"size=4 name="p"value="'..fare..'"> Temperature grade F</font></h3>\
<IMG SRC="http://esp8266.fancon.cz/common/'..sensorType..'.gif"WIDTH="200"HEIGHT="230"BORDER="2"></body></html>') end
conn:on("sent",function(conn) conn:close() end)
end)
end)
