master_lc.py

import socket
import sys
import RPi.GPIO as GPIO
import time
import pygame, time
from pygame.locals import *


pygame.init()


screen = pygame.display.set_mode((640, 480))
pygame.display.set_caption('Pygame Keyboard Test')
pygame.mouse.set_visible(0)

GPIO.setmode(GPIO.BOARD)
GPIO.setup(2, GPIO.OUT)
GPIO.setup(3, GPIO.OUT)
GPIO.setup(7, GPIO.OUT)
GPIO.setup(17, GPIO.OUT)



def right():
    GPIO.output(2, GPIO.HIGH)
    GPIO.output(3, GPIO.LOW)
    GPIO.output(7, GPIO.HIGH)
    GPIO.output(17, GPIO.LOW)
    time.sleep(0.5)

def left():
    GPIO.output(3, GPIO.HIGH)
    GPIO.output(2, GPIO.LOW)
    GPIO.output(17, GPIO.HIGH)
    GPIO.output(7, GPIO.LOW)
    time.sleep(0.5)

def back():
    GPIO.output(2, GPIO.HIGH)
    GPIO.output(3, GPIO.LOW)
    GPIO.output(17, GPIO.HIGH)
    GPIO.output(7, GPIO.LOW)
    time.sleep(0.5)

def forward():
    GPIO.output(3, GPIO.HIGH)
    GPIO.output(2, GPIO.LOW)
    GPIO.output(7, GPIO.HIGH)
    GPIO.output(17, GPIO.LOW)
    time.sleep(0.5)


def create_socket():
    try:
        global host
        global s
        global port
        host=""
        port=9999
        s=socket.socket()
    except socket.error as mag:
        print("socket creation error",str(mag))


def bind_socket():
    try:
        global host
        global s
        global port

        print("binding the socket")
        s.bind((host,port))
        s.listen(5)


    except socket.error as mag:
        print("socket binding error ",str(mag)," retrying")
        bind_socket()


def accept():
    conn,adress=s.accept()
    print("ip : ",adress[0]," port : ",adress[1])
    send_command(conn)
    conn.close()


def send_command(conn):
    while True:
        for event in pygame.event.get():
            if (event.type == pygame.QUIT):
                pygame.quit()
                conn.close()
                s.close()
                sys.exit()
            if event.type == pygame.KEYDOWN:
                if(event.key== K_RIGHT):
                    conn.send(str.encode('right'))
                    right()
                elif(event.key== K_LEFT):
                    conn.send(str.encode('left'))
                    left()
                elif(event.key== K_DOWN):
                    conn.send(str.encode('back'))
                    back()
                elif(event.key== K_UP):
                    conn.send(str.encode('forward'))
                    forward()






def main():
    create_socket()
    bind_socket()
    accept()

main()