Controlling Raspberry Pi GPIO pins remotely over a TCP connection

Open terminal or connect to Raspberry Pi via Putty and create a new file test.py

Command : nano test.py

copy the code given below and paste it in that file . The code is also available on github .

Press CTRL+X to exit and then y to save changes .

Now to run the file type sudo python test.py

from socket import *  
 ## Import GPIO library  
import RPi.GPIO as GPIO   
 # Use physical pin numbers  
GPIO.setmode(GPIO.BOARD)  
 # Set up header pin 7 (GPIO7) as an output  
GPIO.setup(7,GPIO.OUT)  
host = "0.0.0.0"  
print host  
port = 7777  
s = socket(AF_INET, SOCK_STREAM)  
print "Socket Made"  
s.bind((host,port))  
print "Socket Bound"  
s.listen(5)  
print "Listening for connections..."  
while True:  
    c, addr = s.accept()   # Establish connection with client.  
    print 'Got connection from', addr  
    c.send('Thank you for connecting')  
    data = c.recv(1024)  
    if(data == "on" ):  
        print 'pin 7 on'  
        GPIO.output(7,True) ## Turn on GPIO pin 7  
    elif(data == 'off' ):  
        print 'pin 7 off'      
        GPIO.output(7,False) ## Turn off GPIO pin 7  
    elif(data == 'close' ):  
        print 'closing connection'  
        s.close()  
        break  
   c.close()   
 GPIO.cleanup() 

Now use a TCP client to connect to this TCP server and send data .
Modify the pin number to control other GPIO pins .