One code is flask in python and one is html. could one explain to me how to run them so that i can get atleast the dashboard attached and what is the procedure that one has to run to get the the output above. when i run mine.I cannot even an output on the html side. what am i doing wrong?

assign2-b.py

# import flask libraries for more details on flask, go to # https://www.tutorialspoint.com/flask/index.htm from flask import Flask, render_template

# import the GrovePi+ libraries from grovepi import *

# flask constructor for taking the current module as an argument # this initializes the Python script as a app object # we will use the app object to run a web server using Flask # so we can access it via a HTML page app = Flask(__name__)

# read the temperature sensor from D3 port temp_sensor = 3

# ************************************************************************** # Routing in Flask # ************************************************************************** # flask uses a routing technique for # enabling the user to remember URLs # of applications (eg. similar to REST). You can then access the page # directly with no further navigation

# ************************************************************************** # RESTful Method: getTemp that returns the temperature from DHT11 # ************************************************************************** # A route in REST services provides a mapping from a URL to a specific # method. A route is associated with HTTP verbs (GET, POST, etc.). # ************************************************************************** # The getTemp method retrieves the temperature from the temperature # sensor and returns a string with the temperature value. # ************************************************************************** # The @app.route enables the routing from the URL to be mapped to # this function, acting as a RESTful service method. For example, # assume the URL where the web server is running is: # http://localhost:some_port/getTemp # when accessing this URL, it would map to this function # which returns the temperature as a string. # ************************************************************************** # Summary: instead of exposing the method by name, we use REST # to expose the method via the URL. # ************************************************************************** # Why use the route? # route the getTemp function this function will be used when we call the # this file from the AJAX script in the HTML file. That is, when the # setInterval in from Google Chart elapses, call this function it simply # returns the temperature # ************************************************************************** # ************************************************************************** @app.route("/getTemp") def getTemp(): [temp, hum] = dht(temp_sensor, 0) return str(temp)

# ************************************************************************** # RESTful Method: main route of the URL path (root) # ************************************************************************** # this method is the default root path which returns the temperature # the function to be called when accessing the root URL # http://localhost:some_port/ @app.route("/") def getStatus(): try: [temp, hum] = dht(temp_sensor, 0) print(temp)

# ************************************************************************** # define dynamic data to be sent: # ************************************************************************** # create a collection (in this case one variable) to store # the temperature information. This collection will be used # rendering HTML using the render_template function # the following is a JSON formatted data. # the elements in templateData will be passed via JavaScript # to the JavaScript elements and map to the gauge chart. # For example, we are passing a variable called temp (left) # whose value is the value of a local variable in this script # also called temp (the one extracted from [temp, hum] above). # When considering the ultrasonic, you should appened this # JSON collection such that you include the value of the # distance from ultrasonic. Then, retrieve it in HTML. templateData = { 'temp': temp }

# ************************************************************************** # web template engine using Jinja: # this allows us to define dynamic elements based on a web request and # map them to HTML elements via JavaScript # ************************************************************************** # one of the useful features of flask is the "template rendering" # It is based on the Jinja2 template engine which means that one # can combine HTML and program code (e.g. Python) which can be # rendered directly. The usefulness of this is that is it not easy # to use scripts like Python to output HTML (e.g. lots of print # statements) and this makes inefficient. Hence, rendering simplifies # this process. We can also pass, for example, variables (or collection # of variables to the HTML file and their values will then bind to HTML # elements. This means that we can then control the values of these # variables from the Python script. # IMPORTANT: render_template will look for the assign2-b.html file # in a "templates" folder. Hence, ensure that you place assign2-b.html # in a sub-folder called templates return render_template('assign2-b.html', **templateData) except: print('an error has occured')

# ************************************************************************** # Setup a Development Server using Flask # create a web server instance and set the IP and Port via Flask # ************************************************************************** # Flask uses the run() function to run the application on the local server # you can specify the host, port, debug and options. If you do not specify # the port, then the default port of the localhost:5000. You can change the # port to any port number that you wish (in this example, we use port 1200) # The Debug mode automate the reloading of the server if the source code # changes. That is, if the server is running and you modify this script # and save it, the server automatically is reloaded. # The host by default is 127.0.0.1. If set to 0.0.0.0 this indicates that # the server can be available externally # ************************************************************************** # ************************************************************************** if __name__ == '__main__': app.run(debug=True, port=1200, host='0.0.0.0')

assign2-b.html