how to make room temparature and humidity monitor

in this blog i am showing how to build your own room temparature and humidity monitering system...(a device that measures the humidity data and temperature data and logs it and displays it on a LCD screen)this system for somany applications like incubator,home automation etc....
so lets  gets started
                  

things needed

arduino uno r3
DHT11 SENSOR MODULE

16*2 lcd module
330 ohm resistor
jumper wires

first lets test the dht11 module
The DHT11 is a temperature and humidity sensor on one board, it easy to use with the arduino 
connect the arudino to the dht11 as follows
5V -- VCC of the sensor(2nd pin)
Gnd -- Gnd of the sensor(3rd pin)
D7 -- Signal or data pin of the sensor(1st pin)
after connecting upload the code and open serial moniter 
if everything works perfectly lets make our display
follow the circuit diagram
circuit diagram

again if everything works as expected  lets move to soldering
thats it.....

code and circuit