Solution $-$

python code $-$

import RPi.GPIO as GPIO

from flask import Flask, render$\_$template $,$ request

app $=$ Flask$(\_$name$\_)$

GPIO.setmode$($GPIO$.$BCM$)$

GPIO.setwarnings$($False$)$

ledRed$=13$

ledYellow$=19$

ledGreen$=26$

ledRedSts$=0$

ledYellowSts$=0$

ledGreenSts$=0$

GPIO.setup$($ledRed$,$ GPIO.OUT$)$

GPIO.setup$($ledYellow$,$ GPIO.OUT$)$

GPIO.setup$($ledGreen$,$ GPIO.OUT$)$

GPIO.uotput$($ledRed$,$ GPIO.LOW$)$

GPIO.uotput$($ledYellow$,$ GPIO.LOW$)$

GPIO.uotput$($ledGreen$,$ GPIO.LOW$)$

@app.route$(\text{'}/\text{'})$

def index$()$:

ledRedSts $=$ GPIO.input$($ledRed$)$

ledYellowSts $=$ GPIO.input$($ledYellow$)$

ledGreenSts $=$ GPIO.input$($ledgreen$)$

templateData $=\{\text{'}$ledRed$\text{'}$ :ledRedSts $,$

ledYellow' :ledYellowSts,

ledGreen' :ledGreenSts$\}$

return render$\_$template$(\text{'}$index$.$html$\text{'},**$templateData$)$

@app.route$(\text{'}//\text{'})$

def do$($deviceName $,$ action$)$:

if deviceName $==$"ledRed":

actuator$==$ledRed

if deviceName $==$"ledYellow":

actuator$==$ledYellow

if deviceName $==$"ledGreen":

actuator$==$ledGreen

if action $=="$on$"$:

GPIO.output$($actuator$,$GPIO.HIGH$)$

if action $==$"off":

GPIO.output$($actuator$,$GPIO.LOW$)$

ledRedSts$=$GPIO.input$($ledRed$)$

ledYellowSts$=$GPIO.input$($ledYellow$)$

ledGreen$=$GPIO.input$($ledGreen$)$

templateData $=\{\text{'}$ledRed$\text{'}$ :ledRedSts $,$

ledYellow' :ledYellowSts,

ledGreen' :ledGreenSts$\}$

return render$\_$template$(\text{'}$index$.$html$\text{'},**$templateData$)$

if $\_$name$\_=="\_$main$\_"$:

app.run$($host $=\text{'}0\mathrm{.}0\mathrm{.}0\mathrm{.}0\text{'},$debug$=$True$)$

Html code$-$

GPIO Control Web App

a simple home automation system protoype is to be designed using raspberry pi$,$ it should satisfy the following features:

the system is to be turned on and off using external switch

outdoor lights are to be turned on and off according to ambient light conditions.

the system includes motion sensor $($PIR sensor $)$placed at the main gate of the house,whenever motion is detected $,$an led is to be turned on a buzzer is start beeping with a frequency $1$ hz and raspberry pi camera is to take still image and save it$.$

after taking the still image $,$ the system should wait for a response from owner $,$if the owner presses corresponding pushbutton $,$ servomotor should rotate in order to open the gate $($going from angle $0$ to $180)$

when the gate is open $,$an ultrasonic sensor should detect an in$-$range movement $,$ when no movement is in$-$range after $10$ seconds $,$ the gate will close $.$

a$)$draw a flowchart of the described system.

b$)$draw the schematic of all connections needed for the described system $.$

c$)$write the python code needed for all features of the described system $,$ your code should satisfy the flowchart uploaded in part a$.$