資料來源: Control of your Appliances and IoT Devices at your Fingertips with Flask
Connecting to your database
https://dzone.com/articles/restful-web-services-with-python-flask
E:xample : Browser Graphical User Interface (GUI) for Sprinkler System
TEST & Control the relay(s) for the Sprinkler system:
This python routine starts the vales connected to the Raspberry Pi pins with the numbers listed
in the array “zone” (8, 7, 14, 15, 18, 23, 24, 25),
# import the necessary packages
import RPi.GPIO as GPIO
import time
# set the GPIO mode
GPIO.setmode(GPIO.BCM)
zone = [8, 7, 10, 9, 14, 15, 18, 23, 24, 25]
#################################################
# List of zones with the times for each zone ####
#################################################
#8 = House front left, Large tree, at walk way
s8 = [zone[0], 200]
#7 = House front left, Large tree, at garage wall
s7 = [zone[1], 200]
#10 = right corner of backyard behind shed
s10 = [zone[2], 200]
#9 = Backyard cherry trees
s9 = [zone[3], 200]
#14 = Orange Trees, Plum trees, Apple tree..
s14 = [zone[4], 200]
#15 = Front right stripe
s15 = [zone[5], 200]
#18 = Cypresses left
s18 = [zone[6], 200]
#23 = planting boxes
s23 = [zone[7], 200]
#24 = Roses house wall
s24 = [zone[8], 150]
#25 = House wall at AC
s25 = [zone[9], 150]
def openCloseValves(valve, zeit):
print("Opening Valve",valve," for ",zeit," seconds")
time.sleep(5.0)
GPIO.setup(valve, GPIO.OUT)
GPIO.output(valve, GPIO.LOW) # Open valve
time.sleep(zeit)
GPIO.output(valve, GPIO.HIGH) # Close valve
time.sleep(5.0)
print("done...")
def run():
openCloseValves(s8[0],s8[1])
openCloseValves(s7[0],s7[1])
openCloseValves(s10[0],s10[1])
openCloseValves(s9[0],s9[1])
openCloseValves(s14[0],s14[1])
openCloseValves(s15[0],s15[1])
openCloseValves(s18[0],s18[1])
openCloseValves(s23[0],s23[1])
openCloseValves(s24[0],s24[1])
openCloseValves(s25[0],s25[1])
# perform a bit of cleanup
GPIO.cleanup()
if __name__=='__main__':
try:
run()
except:
# Shut all valves...
for num in zone:
GPIO.setup(num, GPIO.OUT)
GPIO.output(num, GPIO.HIGH)
GPIO.cleanup()
print("An Error occured OR user stopped routine...!!!")
raise
The file webForm contains following python code
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#!/usr/bin/python
#!/usr/bin/python
from flask import Flask, render_template, flash, request
from wtforms import Form, TextField, validators
import json
import RPi.GPIO as GPIO
import sprinklerMain as valvesMain
import os
# App config.
DEBUG = True
app = Flask(__name__)
app.config.from_object(__name__)
app.config['SECRET_KEY'] = '17d441f27d441f27567d441f2b6176a'
with open('/home/pi/Blog_flaskSprinkler/settings.json') as data_file:
sprinkler = json.load(data_file)
class ReusableForm(Form):
Z0 = TextField('Z0:', validators=[validators.required(), validators.Length(min=1, max=35)])
Z1 = TextField('Z1:', validators=[validators.required(), validators.Length(min=1, max=35)])
Z2 = TextField('Z2:', validators=[validators.required(), validators.Length(min=1, max=35)])
Z3 = TextField('Z3:', validators=[validators.required(), validators.Length(min=1, max=35)])
@app.route("/", methods=['GET', 'POST'])
def guiPage():
form = ReusableForm(request.form)
if request.method == 'POST':
if request.form['submit'] == "submitAll":
Z0=request.form['Z0']
if Z0 and Z0.isnumeric():
valve = sprinkler['0']
sprinkler['0'] = [valve[0], Z0]
Z1=request.form['Z1']
if Z1 and Z1.isnumeric():
valve = sprinkler['1']
sprinkler['1'] = [valve[0], Z1]
Z2=request.form['Z2']
if Z2 and Z2.isnumeric():
valve = sprinkler['2']
sprinkler['2'] = [valve[0], Z2]
Z3=request.form['Z3']
if Z3 and Z3.isnumeric():
valve = sprinkler['3']
sprinkler['3'] = [valve[0], Z3]
flash('Zone0 : ' + Z0)
flash('Zone1 : ' + Z1)
flash('Zone2 : ' + Z2)
flash('Zone3 : ' + Z3)
# Save new values back to the json file...:
with open('/home/pi/Blog_flaskSprinkler/settings.json','w+') as fp:
json.dump(sprinkler, fp, sort_keys=True, indent=4)
elif request.form['submit'] == "startAll":
print("Starting all valves...")
os.system('/home/pi/flaskSprinkler/sprinklerMain.py &') # Start sprinklerMain in background (new thread)...
elif request.form['submit'] == "stopAll":
print("Stopping all valves...")
valvesMain.closeAllValves() # stop all valves...
#...0...
elif request.form['submit'] == "start0":
print("Starting 0 : Front left, at walkway...")
valve = sprinkler['0']
valvesMain.openValve(int(valve[0]))
elif request.form['submit'] == "stop0":
print("Stop 0")
valve = sprinkler['0']
valvesMain.closeValve(int(valve[0]))
#...1...
elif request.form['submit'] == "start1":
print("Starting 1 : Front left, at garage wall...")
valve = sprinkler['1']
valvesMain.openValve(int(valve[0]))
elif request.form['submit'] == "stop1":
print("Stop 1")
valve = sprinkler['1']
valvesMain.closeValve(int(valve[0]))
#...2...
elif request.form['submit'] == "start2":
print("Starting 2 : Right backyard, behind shed...")
valve = sprinkler['2']
valvesMain.openValve(int(valve[0]))
elif request.form['submit'] == "stop2":
print("Stop 2")
valve = sprinkler['2']
valvesMain.closeValve(int(valve[0]))
#...3...
elif request.form['submit'] == "start3":
print("Starting 3 : Backyard cherry trees...")
valve = sprinkler['3']
valvesMain.openValve(int(valve[0]))
elif request.form['submit'] == "stop3":
print("Stop 3")
valve = sprinkler['3']
valvesMain.closeValve(int(valve[0]))
valve=[]
dynamicvalue=[]
for i in range(0,len(sprinkler)):
valve = sprinkler[str(i)]
dynamicvalue.append(int(valve[1]))
return render_template('guiPage.html', form=form, defname = dynamicvalue)
if __name__ == "__main__":
#app.run(debug=True, host='0.0.0.0')
app.run(host='0.0.0.0')
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sudo chmod ug+x webForm.py
$> ./webForm
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settings.json
{
"0": [
"25",
"200"
],
"1": [
"27",
"200"
],
"2": [
"21",
"200"
],
"3": [
"23",
"200"
]
}
sprinklerMain.py
import RPi.GPIO as GPIO
import time
import json
import os
from collections import OrderedDict
def openCloseValves(valve, zeit):
print("Opening Valve " + str(valve) + " for " + str(zeit) + " seconds..."),
GPIO.setwarnings(False)
GPIO.setmode(GPIO.BCM)
time.sleep(5.0)
GPIO.setup(valve, GPIO.OUT)
GPIO.output(valve, GPIO.LOW) # Open valve
time.sleep(zeit)
GPIO.output(valve, GPIO.HIGH) # Close valve
time.sleep(5.0)
print("Done")
def openValve(valve):
print("Opening Valve " + str(valve) + " ..."),
#GPIO.setwarnings(False)
GPIO.setmode(GPIO.BCM)
GPIO.setup(valve, GPIO.OUT)
GPIO.output(valve, GPIO.LOW) # Open valve
print("Done")
return()
def closeValve(valve):
print("Closing Valve " + str(valve) + " ..."),
GPIO.setmode(GPIO.BCM)
GPIO.setup(valve, GPIO.OUT)
GPIO.output(valve, GPIO.HIGH) # Close valve
print("Done")
return()
def run():
value =[]
with open('/home/pi/flaskSprinkler/settings.json') as data_file:
sprinkler = json.load(data_file)
for i in range(0,len(sprinkler)):
value = sprinkler[str(i)]
valve = int(value[0])
zeit = int(value[1])
print("sprinkler new " + str(valve) + " value : " + str(zeit))
openCloseValves(valve, zeit)
# Perform a bit of cleanup...
GPIO.cleanup()
def closeAllValves():
GPIO.setmode(GPIO.BCM)
for value in range(2,28):
try:
GPIO.setup(int(value), GPIO.OUT)
GPIO.output(int(value), GPIO.HIGH)
except:
continue # continue with the next GPIO pin...
GPIO.cleanup()
# Kill routine sprinkler script in case that is running...
try:
os.system("sudo pkill -9 sprinklerMain.py")
time.sleep(1)
except:
pass
if __name__=="__main__":
try:
run()
except:
closeAllValves()
print("An Error occured OR user stopped routine...!!!")
raise
guiPage.html. This file needs to be in the folder templates/.
<div class="container">
<h2>Sprinkler Setting Web Form</h2>
<form action="" method="post">
<div class="form-group">
<table class="responsable">
<tbody>
<tr>
<td><label for="Z0">Zone 0 : Front left, at walk way</label></td>
<td><input id="Z0" class="form-control" name="Z0" type="text" placeholder="Front left, at walk way..." /></td>
<td><button style="width: 100px; font-size: 18pt; padding: 2px; border: 3px solid green;" name="submit" type="submit" value="start0">Start0</button></td>
<td><button style="width: 100px; font-size: 18pt; padding: 2px; border: 3px solid red;" name="submit" type="submit" value="stop0">Stop0</button></td>
</tr>
<tr>
<td><label for="Z1">Zone 1 : Front left, at garage wall</label></td>
<td><input id="Z1" class="form-control" name="Z1" type="text" placeholder="Front left, at garage wall..." /></td>
<td><button style="width: 100px; font-size: 18pt; padding: 2px; border: 3px solid green;" name="submit" type="submit" value="start1">Start1</button></td>
<td><button style="width: 100px; font-size: 18pt; padding: 2px; border: 3px solid red;" name="submit" type="submit" value="stop1">Stop1</button></td>
</tr>
<tr>
<td><label for="Z2">Zone 2 : Right backyard, behind shed</label></td>
<td><input id="Z2" class="form-control" name="Z2" type="text" placeholder="Right backyard, behind shed..." /></td>
<td><button style="width: 100px; font-size: 18pt; padding: 2px; border: 3px solid green;" name="submit" type="submit" value="start2">Start2</button></td>
<td><button style="width: 100px; font-size: 18pt; padding: 2px; border: 3px solid red;" name="submit" type="submit" value="stop2">Stop2</button></td>
</tr>
<tr>
<td><label for="Z3">Zone 3 : Backyard cherry trees.</label></td>
<td><input id="Z3" class="form-control" name="Z3" type="text" placeholder="Backyard cherry trees..." /></td>
<td><button style="width: 100px; font-size: 18pt; padding: 2px; border: 3px solid green;" name="submit" type="submit" value="start3">Start3</button></td>
<td><button style="width: 100px; font-size: 18pt; padding: 2px; border: 3px solid red;" name="submit" type="submit" value="stop3">Stop3</button></td>
</tr>
</tbody>
</table>
</div>
<button class="btn btn-success" style="width: 650px; font-size: 18pt; padding: 2px; border: 6px solid black;" name="submit" type="submit" value="submitAll">Write times specified (let-out fileds not changed)</button> <button class="btn btn-success" style="width: 650px; font-size: 18pt; padding: 2px; border: 6px solid green;" name="submit" type="submit" value="startAll">Start all zones</button> <button class="btn btn-success" style="width: 650px; font-size: 18pt; padding: 2px; border: 6px solid red;" name="submit" type="submit" value="stopAll">Stop all zones</button>
<h3>Values Set:</h3>
</form></div>
Keeping it Running
@reboot /home/pi/flaskSprinkler/shutSprinkler.py
15 22 * * * nohup /home/pi/flaskSprinkler/sprinklerMain.py &
*/5 * * * * nohup /home/pi/flaskSprinkler/isFlaskRunning.sh &
#----------------------
shutSprinkler.py
# import the necessary packages
import RPi.GPIO as GPIO
import time
#import cv2
# load the input image and display it to our screen
#print("click on the image and press any key to continue...")
#image = cv2.imread("hoover_dam.jpg")
#cv2.imshow("Image", image)
#cv2.waitKey(0)
#print("moving on...")
# set the GPIO mode
GPIO.setmode(GPIO.BCM)
# loop over the LEDs on the TrafficHat and light each one
# individually
for i in (14,15,18,23,24,25,8,7,2,3,4,17,27,22,10,9):
GPIO.setup(i, GPIO.OUT)
time.sleep(0.1)
GPIO.output(i, GPIO.HIGH)
# perform a bit of cleanup
GPIO.cleanup()
isFlaskRunning.sh
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#!/bin/bash
#!/bin/bash
service="webForm"
if ! ps -e | grep "$service" ; then
/home/pi/flaskSprinkler/webForm
fi
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