feeder_server.py

#blog.oscarmorrison.com
#Cat feeder (open and close server)
#change the pin, and port here.
from flask import Flask, jsonify
import RPi.GPIO as IO
import time

pinOut = 4

app = Flask(__name__)

@app.route('/')
def index():
    return jsonify(response='pinging from the cat feeder!')

@app.route('/open')
def openRouteWithDefaultTime():
    time = 0.5
    openFeeder(time)
    return jsonify(response='feeding the kitty '+str(time))

@app.route('/open/<time>')
def openRoute(time):
    time = float(time)
    openFeeder(time)
    return jsonify(response='feeding the kitty '+str(time))

def openFeeder(wait):
    print('Opening cat feeder for ', wait)
    IO.setwarnings(False)
    IO.setmode (IO.BCM)
    IO.setup(pinOut,IO.OUT)
    pwm = IO.PWM(pinOut,50)
    pwm.start(2.5)
    time.sleep(0.5)
    pwm.ChangeDutyCycle(7.5)
    time.sleep(wait)
    pwm.ChangeDutyCycle(2.5)
    time.sleep(0.5)
    pwm.stop(2.5)

if __name__ == '__main__':
    app.run(host='0.0.0.0', debug=True)