Implementing a feed mode for the reef-pi

feedmode.py

#!/usr/bin/env python

"""Feedmode.py: Feedmode extends reef-pi by implementing a proper feedmode buttom/timer."""

#   Copyright 2018 John Rudolf Lewis
#
#   Licensed under the Apache License, Version 2.0 (the "License");
#   you may not use this file except in compliance with the License.
#   You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
#   Unless required by applicable law or agreed to in writing, software
#   distributed under the License is distributed on an "AS IS" BASIS,
#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#   See the License for the specific language governing permissions and
#   limitations under the License.

import time, json, requests, datetime
import RPi.GPIO as GPIO

BUTTON_PIN = 12
USERNAME = "reef-pi"
PASSWORD = "reef-pi"
POWERHEAD_ID = 2
RETURNPUMP_ID = 1
FEED_DURATION_SECONDS = 300

feedmode_running = False
feedmode_expire_at = datetime.datetime.now()

def _login():
   session = requests.Session();
   session.post("http://localhost/auth/signin", data = json.dumps({"user":USERNAME,"password":PASSWORD}))
   return session
  
def _toggle_equipment(session, id, on):
   r = session.get("http://localhost/api/equipment/{id}".format(id=id))
   if r.status_code != 200:
      return False
   equipment = json.loads(r.text)
   equipment['on'] = on
   r = session.post("http://localhost/api/equipment/{id}".format(id=id), data = json.dumps(equipment))
   return r.status_code == 200

def _equipment_on(session, id):
   r = session.get("http://localhost/api/equipment/{id}".format(id=id))
   if r.status_code != 200:
      return False
   return json.loads(r.text)['on']

def _on_button_press(channel):
   global feedmode_running
   global feedmode_expire_at

   session = _login()

   if not feedmode_running:
      feedmode_running = True
      feedmode_expire_at = datetime.datetime.now() + datetime.timedelta(seconds=FEED_DURATION_SECONDS)
      _toggle_equipment(session, RETURNPUMP_ID, False)
      print str(datetime.datetime.now()), " ReturnPump turned off."
   elif _equipment_on(session, POWERHEAD_ID):
      _toggle_equipment(session, POWERHEAD_ID, False)
      print str(datetime.datetime.now()), " PowerHead turned off."
   else:
      _toggle_equipment(session, POWERHEAD_ID, True)
      print str(datetime.datetime.now()), " PowerHead turned on."
      _toggle_equipment(session, RETURNPUMP_ID, True)
      print str(datetime.datetime.now()), " ReturnPump turned on."
      feedmode_running = False
      
def _on_timer():
   global feedmode_running
   if feedmode_running and feedmode_expire_at < datetime.datetime.now():
      session = _login()
      _toggle_equipment(session, POWERHEAD_ID, True)
      print str(datetime.datetime.now()), " PowerHead turned on."
      _toggle_equipment(session, RETURNPUMP_ID, True)
      print str(datetime.datetime.now()), " ReturnPump turned on."
      feedmode_running = False

GPIO.setmode(GPIO.BCM)
GPIO.setup(BUTTON_PIN, GPIO.IN, pull_up_down=GPIO.PUD_UP)
GPIO.add_event_detect(BUTTON_PIN, GPIO.FALLING, callback=_on_button_press, bouncetime=500)

print str(datetime.datetime.now()), " Ready!"

while True:
   _on_timer()
   time.sleep(1)

Are there any instruction to implement this mode ?

Are there any instruction to implement this mode ?

never wrote any... but I recall that all I did was to set this up to run as a service so that it starts up each time the pi reboots. But first, you will want to modify the constants as appropriate for your setup, both the button pin number, and the equipment ids.

Got it. Thanks.