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flaskapp/__init__.py

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+from flask import Flask
+from config import Config
+from flask_sqlalchemy import SQLAlchemy
+from flask_migrate import Migrate
+from flask_bootstrap import Bootstrap
+
+app = Flask(__name__)
+app.config.from_object(Config)
+db = SQLAlchemy(app)
+migrate = Migrate(app, db)
+
+from flaskapp import routes, models, errors
+
+bootstrap = Bootstrap(app)

flaskapp/dangercalc.py

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+from flaskapp.models import DangerLevel
+
+Critical_Temperature = 105
+Critical_Light = 40
+Critical_Humididty = 80
+
+def danger_calculation(baro_pressure,light,humidity,avg_temp):
+    if avg_temp >= Critical_Temperature:
+        return DangerLevel.Critical
+    if light >= Critical_Light:
+        return DangerLevel.Critical
+    if humidity >= Critical_Humididty:
+        return DangerLevel.Critical

flaskapp/errors.py

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+from flask import render_template
+from flaskapp import app, db
+
+@app.errorhandler(404)
+def not_found_error(error):
+    return render_template('404.html'), 404
+
+@app.errorhandler(500)
+def internal_error(error):
+    db.session.rollback()
+    return render_template('500.html'), 500

flaskapp/models.py

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+from flaskapp import db
+
+class SensorData(db.Model):
+    id = db.Column(db.Integer, primary_key=True)
+    humidity = db.Column(db.Float)
+    avg_temp = db.Column(db.Float)
+    baro_pressure = db.Column(db.Float)
+    light = db.Column(db.Float)
+    timestamp = db.Column(db.DateTime)
+    danger_level = db.Column(db.Integer)
+
+    def __repr__(self):
+        return '<SensorData {}>'.format(self.id)
+    
+    @staticmethod
+    def getAll():
+        return SensorData.query.all()
+
+class DangerLevel():
+    Critical = 1 #The server is in a dangerous state, it should be automatically shutdown to prevent damage to components and data loss.
+    High = 2 #The server is outside of standard operating conditions, and its state should be manually reviewed to prevent data loss.
+    Medium = 3 #The server getting close to the limit of standard operating conditions and should be kept an eye on, but could also be due to sustained load.
+    Low = 4 #The server is a little above standard temperatures, however is standard for burst computing.
+    Nil = 5 #There is no danger level; data is normal.
+    Unknown = 6 #Some data may be incorrect, and the sensor should be checked.
+    Tampered = 7 #The server may have been tampered with, such as getting moved or physically accessed.
+    Other = 8

flaskapp/routes.py

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+from flaskapp import app, db
+from flaskapp.models import SensorData, DangerLevel
+from flask import render_template, request, jsonify
+import datetime
+from flaskapp.dangercalc import danger_calculation
+
+@app.route("/")
+@app.route("/index")
+def index():
+    data = SensorData.query.order_by(SensorData.timestamp.desc())
+    return render_template('index.html', title='Home', data=data)
+
+@app.route('/', methods=["POST"])
+def newdata():
+    baro_temp = round(request.json['baro_temp'], 2)
+    baro_pressure = round(request.json['baro_pressure'], 2)
+    light = round(request.json['light'], 2)
+    humidity_temp = round(request.json['humidity_temp'], 2)
+    humidity = round(request.json['humidity'], 2)
+    avg_temp = round((baro_temp + humidity_temp)/2, 2)
+    timestamp = datetime.datetime.now()
+    danger_level = danger_calculation(baro_pressure, light, humidity, avg_temp)
+
+    sensordata = SensorData(timestamp=timestamp, baro_pressure=baro_pressure,light=light,humidity=humidity, avg_temp=avg_temp, danger_level=danger_level)
+    
+    db.session.add(sensordata)
+    db.session.commit()
+
+    return jsonify(), 201
+
+@app.route("/graph")
+def graph():
+    line_labels = ['']
+
+    line_values = SensorData.getAll()
+    line_values.sort(key=lambda x: x.timestamp)
+    line_values = line_values[-12:]
+
+    return render_template('graph.html', title='Average Temperature Graph', max=40, labels=line_labels, values=line_values)

flaskapp/templates/404.html

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+{% extends "base.html" %}
+
+{% block app_content %}
+<h1>Not Found</h1>
+<p><a href="{{url_for('index') }}">Back</a></p>
+{% endblock %}

flaskapp/templates/500.html

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+{% extends "base.html" %}
+
+{% block app_content %}
+<h1>500 Server Error</h1>
+<p><a href="{{url_for('index') }}">Back</a></p>
+{% endblock %}

flaskapp/templates/base.html

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+{% extends 'bootstrap/base.html' %}
+
+{% block title %}
+    {% if title %}{{ title }} - IoT Flask App{% else %}IoT Flask App{% endif %}
+{% endblock %}
+
+{% block navbar %}
+    <nav class="navbar navbar-default">
+        <div class="container">
+            <div class="navbar-header">
+                <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1" aria-expanded="false">
+                    <span class="sr-only">Toggle navigation</span>
+                    <span class="icon-bar"></span>
+                    <span class="icon-bar"></span>
+                    <span class="icon-bar"></span>
+                </button>
+                <a class="navbar-brand" href="{{ url_for('index') }}">IoT Flask App</a>
+            </div>
+            <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
+                <ul class="nav navbar-nav">
+                    <li><a href="{{ url_for('index') }}">Home</a></li>
+                </ul>
+                <ul class="nav navbar-nav">
+                    <li><a href="{{ url_for('graph') }}">Temp Graph</a></li>
+                </ul>
+            </div>
+        </div>
+    </nav>
+{% endblock %}
+
+<div class="container">
+    {% block content %}
+    {% endblock %}
+</div>

flaskapp/templates/graph.html

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+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="utf-8" />
+  <title>{{ title }}</title>
+  <script src='https://cdnjs.cloudflare.com/ajax/libs/Chart.js/1.0.2/Chart.min.js'></script>
+</head>
+
+<body>
+  <center>
+    <h1>{{ title }}</h1>
+
+    <canvas id="chart" width="600" height="400"></canvas>
+    <script>
+
+      // bar chart data
+      var barData = {
+        labels : [
+          {% for item in values %}
+            "{{ item.timestamp }}",
+          {% endfor %}
+        ],
+
+        datasets : [{
+          fillColor: "rgba(151,187,205,0.2)",
+          strokeColor: "rgba(151,187,205,1)",
+          pointColor: "rgba(151,187,205,1)",
+          pointStrokeColor: "#fff",
+          pointHighlightFill: "#fff",
+          pointHighlightStroke: "rgba(151,187,205,1)",
+          bezierCurve : false,
+          data : [
+	    {% for item in values %}
+              {{ item.avg_temp }},
+            {% endfor %}]
+          }
+	]
+      }
+
+      Chart.defaults.global.animationSteps = 50;
+      Chart.defaults.global.tooltipYPadding = 16;
+      Chart.defaults.global.tooltipCornerRadius = 0;
+      Chart.defaults.global.tooltipTitleFontStyle = "normal";
+      Chart.defaults.global.tooltipFillColor = "rgba(0,0,0,0.8)";
+      Chart.defaults.global.animationEasing = "easeOutBounce";
+      Chart.defaults.global.responsive = false;
+      Chart.defaults.global.scaleLineColor = "black";
+      Chart.defaults.global.scaleFontSize = 16;
+
+      // get bar chart canvas
+      var mychart = document.getElementById("chart").getContext("2d");
+
+      steps = 10
+      max = {{ max }}
+      // draw bar chart
+      var LineChartDemo = new Chart(mychart).Line(barData, {
+        scaleOverride: true,
+        scaleSteps: steps,
+        scaleStepWidth: Math.ceil(max / steps),
+        scaleStartValue: 0,
+        scaleShowVerticalLines: true,
+        scaleShowGridLines : true,
+        barShowStroke : true,
+        scaleShowLabels: true,
+        bezierCurve: false,
+      });
+
+    </script>
+  </center>
+</body>
+</html>

flaskapp/templates/index.html

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+{% extends "base.html" %}
+
+{% block content %}
+
+<h1>Sensor Data</h1>
+
+<table class="table table-striped table-bordered table-sm">
+    <th>
+        <tr>
+            <td><b>Humidity</b></td>
+            <td><b>Average Temp</b></td>
+            <td><b>Barometer Pressure</b></td>
+            <td><b>Light</b></td>
+            <td><b>Timestamp</b></td>
+        </tr>
+    </th>
+    {% for item in data %}
+    {% if item.danger_level == 1 %}
+    <tr style="color: red;">
+    {% else %}
+    <tr>
+    {% endif %}
+        <td>{{ item.humidity }}%</td>
+        <td>{{ item.avg_temp }}°C</td>
+        <td>{{ item.baro_pressure }} hPa</td>
+        <td>{{ item.light }} lx</td>
+        <td>{{ item.timestamp }}</td>
+    </tr>
+    {% endfor %}
+</table>
+
+{% endblock %}