proofofconcept_server.py

#! /usr/bin/env python
import SocketServer, subprocess, sys
from threading import Thread
import RPi.GPIO as GPIO, time, os      

GPIO.setmode(GPIO.BCM)
HOST = '10.1.1.45'
PORT = 2000

def RCtime (RCpin):
        reading = 0
        GPIO.setup(RCpin, GPIO.OUT)
        GPIO.output(RCpin, GPIO.LOW)
        time.sleep(.1)
 
        GPIO.setup(RCpin, GPIO.IN)
        # This takes about 1 millisecond per loop cycle
        while (GPIO.input(RCpin) == GPIO.LOW & reading < 100000):
                reading += 1
        return reading

class SingleTCPHandler(SocketServer.BaseRequestHandler):
    "One instance per connection.  Override handle(self) to customize action."
    def handle(self):
        # self.request is the client connection
        data = self.request.recv(1024)  # clip input at 1Kb
        print data
        reply = RCtime(int(data))
        if reply is not None:
            self.request.send(str(reply))
        self.request.close()

class SimpleServer(SocketServer.ThreadingMixIn, SocketServer.TCPServer):
    # Ctrl-C will cleanly kill all spawned threads
    daemon_threads = True
    # much faster rebinding
    allow_reuse_address = True

    def __init__(self, server_address, RequestHandlerClass):
        SocketServer.TCPServer.__init__(self, server_address, RequestHandlerClass)

if __name__ == "__main__":
    server = SimpleServer((HOST, PORT), SingleTCPHandler)
    # terminate with Ctrl-C
    try:
        server.serve_forever()
    except KeyboardInterrupt:
        sys.exit(0)