2023-24 - Internet of Things (MMI126818)

RESIT Coursework 2: Combined Specification and Submission Template.

4.1 Storing data in the Firestore database Collections 6

4.2 Analysing the data 7

• • The Resit CW2 specification

  • The details of each response that is expected for each part of the CW.

• Feel free to state any assumptions that you make in responding to any section.

• Unless specifically stated otherwise, you are required to provide only your own diagrams/screenshots as part of your responses.

• • have consistent layout,

  • be spell-checked,

• The report must be submitted via Turnitin and must be in .docx format only; PDF files will NOT be accepted.

• Writing Skills

  • • https://www.researchgate.net/publication/240701960_Scientific_Writing_for_Computer_Science_Students

CW2 Specific Notes

Introduction

Port: 1883

Subscription Topic 1: org-glasgow-west/veh-type-2/dev-VEH6543/telemetry

Vehicle ‘Fault’ messages are published on the ‘state’ topic. There is a range of possible vehicle faults. For testing purposes these faults arrive approximately every minute. No publishing is required by you. You must only subscribe.

Received data format example:

Q1: Node-RED Dashboard

• • A Centigrade chart

  • A Fahrenheit chart

• • You should provide an appropriate ‘tab’ name.

  • The ‘groups’ that are used on the tab should have appropriate names.

3. Provide a screenshot of the configuration of the chart node used in the flow.

4. Provide a copy of the code used for the Node-RED function(s) that creates the correct data to be sent to the chart nodes. Any function must be given an appropriate name, with the function-name and code provided below. Only textual code is acceptable, not screenshots.

Q2: Google Maps on Node-RED Cloud Deployment

• Places a marker on the map for the vehicle location, erasing any previous marker.

• The marker has an InfoWindow that delivers two data-items with suitable labels:

2. Provide a copy of the code used for the Node-RED function that creates the object to be sent to the Google Maps flow.

Code (in text format). Provide the function name and then the JavaScript content below.

Q3 Using a database to store and analyse the vehicle data (on Cloud)

Storing data in the Firestore database Collections

Telemetry messages :

• Firestore collection name: ‘vehicle_telemetry_data’.

• • The time in UTC Milliseconds. The key should be: ‘date_time_UTC_milliseconds’. You must generate the value for this with suitable code.

State messages:

• • The time in UTC Milliseconds. The key should be: “date_time_UTC_milliseconds”.

  • The fault type: The key should be ‘vehicle_fault_type’.

Code (in text format) for storing Telemetry messages. Provide the function name and then the JavaScript content below.

Code (in text format) for storing State messages. Provide the function name and then the JavaScript content below.

Analysing the data

You must deliver the following:

• A screenshot of the flow.

The query code for 20 minutes of temperature data.

The code to set-up the data/configuration for the statistics node.

Code Export